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Cisco Security Advisory: Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerabilities



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Cisco Security Advisory: Cisco IOS Software Session Initiation
Protocol Denial of Service Vulnerabilities

Advisory ID: cisco-sa-20110928-sip

Revision 1.0

For Public Release 2011 September 28 1600 UTC (GMT)

+--------------------------------------------------------------------

Summary
=======

Multiple vulnerabilities exist in the Session Initiation Protocol
(SIP) implementation in Cisco IOS Software and Cisco IOS XE Software
that could allow an unauthenticated, remote attacker to cause a
reload of an affected device or trigger memory leaks that may result
in system instabilities. Affected devices would need to be configured
to process SIP messages for these vulnerabilities to be exploitable.

Cisco has released free software updates that address these
vulnerabilities. There are no workarounds for devices that must run
SIP; however, mitigations are available to limit exposure to the
vulnerabilities.

This advisory is posted at
http://www.cisco.com/warp/public/707/cisco-sa-20110928-sip.shtml.

Note: The September 28, 2011, Cisco IOS Software Security Advisory
bundled publication includes ten Cisco Security Advisories. Nine of the
advisories address vulnerabilities in Cisco IOS Software, and one
advisory addresses a vulnerability in Cisco Unified Communications
Manager. Each advisory lists the Cisco IOS Software releases that
correct the vulnerability or vulnerabilities detailed in the advisory as
well as the Cisco IOS Software releases that correct all vulnerabilities
in the September 2011 Bundled Publication.

Individual publication links are in "Cisco Event Response: Semiannual
Cisco IOS Software Security Advisory Bundled Publication" at the
following link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep11.html

Cisco Unified Communications Manager (CUCM) is affected by one of the
vulnerabilities described in this advisory. A separate Cisco Security
Advisory has been published to disclose the vulnerability that affects
the Cisco Unified Communications Manager at the following location:

http://www.cisco.com/warp/public/707/cisco-sa-20110928-cucm.shtml

Vulnerable Products
+------------------

Cisco devices are affected when they are running affected Cisco IOS
Software and Cisco IOS XE Software versions that are configured to
process SIP messages.

Recent versions of Cisco IOS Software do not process SIP messages by
default. Creating a dial peer by issuing the "dial-peer voice"
configuration command will start the SIP processes, causing the Cisco
IOS device to process SIP messages. In addition, several features in
Cisco Unified Communications Manager Express, such as ephones, will
automatically start the SIP process when they are configured, which
could cause the affected device to start processing SIP messages. An
example of an affected configuration follows:

    dial-peer voice <Voice dial-peer tag> voip
     ...
    !

In addition to inspecting the Cisco IOS device configuration for a
"dial-peer" command that causes the device to process SIP messages,
administrators can also use the "show processes | include SIP" command
to determine whether Cisco IOS Software is running the processes that
handle SIP messages. In the following example, the presence of the
processes CCSIP_UDP_SOCKET or CCSIP_TCP_SOCKET indicates that the Cisco
IOS device will process SIP messages:

    Router# show processes | include SIP
     149 Mwe 40F48254            4          1    400023108/24000  0 CCSIP_UDP_SOCKET
     150 Mwe 40F48034            4          1    400023388/24000  0 CCSIP_TCP_SOCKET

Note: Because there are several ways a device running Cisco IOS Software
can start processing SIP messages, the "show processes | include SIP"
command should be used to determine whether the device is processing SIP
messages instead of relying on the presence of specific configuration
commands.

Cisco Unified Border Element images are also affected by two of these
vulnerabilities.

Note: The Cisco Unified Border Element feature (previously known as
the Cisco Multiservice IP-to-IP Gateway) is a special Cisco IOS
Software image that runs on Cisco multiservice gateway platforms.
This feature provides a network-to-network interface point for
billing, security, call admission control, quality of service, and
signaling interworking.

To determine the Cisco IOS Software release that is running on a
Cisco product, administrators can log in to the device and issue the
"show version" command to display the system banner. The system banner
confirms that the device is running Cisco IOS Software by displaying
text similar to "Cisco Internetwork Operating System Software" or
"Cisco IOS Software." The image name displays in parentheses,
followed by "Version" and the Cisco IOS Software release name. Other
Cisco devices do not have the "show version" command or may provide
different output.

The following example identifies a Cisco product that is running
Cisco IOS Software Release 15.0(1)M1 with an installed image name of
C3900-UNIVERSALK9-M:

    Router> show version
    Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)
    Technical Support: http://www.cisco.com/techsupport
    Copyright (c) 1986-2009 by Cisco Systems, Inc.
    Compiled Wed 02-Dec-09 17:17 by prod_rel_team

    !--- output truncated

Additional information about Cisco IOS Software release
naming conventions is available in the white paper Cisco
IOS and NX-OS Software Reference Guide available at
http://www.cisco.com/web/about/security/intelligence/ios-ref.html.

Cisco IOS XE Software is affected by these vulnerabilities.

Note: Cisco Unified Communications Manager is affected by one of the
vulnerabilities described in this advisory. A separate Cisco Security
Advisory has been published to disclose the vulnerability that affects
the Cisco Unified Communications Manager at the following location:

http://www.cisco.com/warp/public/707/cisco-sa-20110928-cucm.shtml

Products Confirmed Not Vulnerable
+--------------------------------

The SIP application layer gateway (ALG), which is used by the Cisco
IOS Network Address Translation (NAT) and firewall features of Cisco
IOS Software, is not affected by these vulnerabilities.

Cisco IOS XR Software is not affected by these vulnerabilities.

No other Cisco products are currently known to be affected by these
vulnerabilities.

Details
=======

SIP is a popular signaling protocol that is used to manage voice and
video calls across IP networks such as the Internet. SIP is
responsible for handling all aspects of call setup and termination.
Voice and video are the most popular types of sessions that SIP
handles, but the protocol has the flexibility to accommodate other
applications that require call setup and termination. SIP call
signaling can use UDP (port 5060), TCP (port 5060), or Transport
Layer Security (TLS; TCP port 5061) as the underlying transport
protocol.

Multiple vulnerabilities exist in the SIP implementation in Cisco IOS
Software that could allow a remote attacker to cause an affected
device to reload or to trigger memory leaks that may result in system
instabilities. These vulnerabilities are triggered when the device
that is running Cisco IOS Software processes crafted SIP messages.
Only traffic destined to the device can trigger the vulnerabilities;
transit SIP traffic is not an exploit vector.

Note: In cases where SIP is running over TCP transport, a TCP
three-way handshake is necessary to exploit these vulnerabilities.

The vulnerabilities are as follow:

CSCth03022 may cause a reload of an affected device. This vulnerability
has been assigned Common Vulnerabilities and Exposures (CVE) ID
CVE-2011-0939.

CSCti48504 may cause memory leaks. This vulnerability has been assigned
CVE ID CVE-2011-3275.

CSCto88686 may cause memory leaks or reloads of affected devices. This
vulnerability has been assigned CVE ID CVE-2011-2072.

Note: this vulnerability also affects Cisco Unified Communications
Manager. The corresponding Cisco bug ID is CSCtl86047. Refer to the
separate Cisco Security Advisory for the Cisco Unified Communications
Manager for additional details.

Vulnerability Scoring Details
=============================

Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.

Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.

Cisco has provided an FAQ to answer additional questions regarding
CVSS at:

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at

http://intellishield.cisco.com/security/alertmanager/cvss

Note that all vulnerabilities in this advisory (CSCth03022, CSCti48504,
and CSCto88686) have been scored in an identical manner, assuming a
complete denial of service (DoS) condition.

* CSCth03022, CSCti48504, CSCto88686

CVSS Base Score - 7.8
    Access Vector -            Network
    Access Complexity -        Low
    Authentication -           None
    Confidentiality Impact -   None
    Integrity Impact -         None
    Availability Impact -      Complete

CVSS Temporal Score - 6.4
    Exploitability -           Functional
    Remediation Level -        Official-Fix
    Report Confidence -        Confirmed


Impact
======

Successful exploitation of the vulnerabilities in this advisory may
result in system instabilities or a reload of an affected device.
Repeated exploitation could result in a sustained DoS condition.

Software Versions and Fixes
===========================

When considering software upgrades, also consult
http://www.cisco.com/go/psirt and any subsequent advisories to determine
exposure and a complete upgrade solution.

In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.

Additionally, the Cisco IOS Software Checker is available on
the Cisco Security Intelligence Operations (SIO) portal at
http://tools.cisco.com/security/center/selectIOSVersion.x. It provides
several features for checking which Security Advisories affect specified
versions of Cisco IOS Software.

Cisco IOS Software
+-----------------

Each row of the following Cisco IOS Software table corresponds to a
Cisco IOS Software train. If a particular train is vulnerable, the
earliest releases that contain the fix are listed in the First Fixed
Release For This Advisory column. The First Fixed Release for All
Advisories in the September 2011 Bundled Publication column lists the
earliest possible releases that correct all the published
vulnerabilities in the Cisco IOS Software Security Advisory bundled
publication. Cisco recommends upgrading to the latest available
release, where possible.

+------------------------------------------------------------+
|   Major    |         Availability of Repaired Releases     |
|  Release   |                                               |
|------------+-----------------------------------------------|
|  Affected  |                       |  First Fixed Release  |
| 12.0-Based |  First Fixed Release  | for All Advisories in |
|  Releases  |                       |  the September 2011   |
|            |                       |  Bundled Publication  |
|------------------------------------------------------------|
| There are no affected 12.0 based releases                  |
|------------------------------------------------------------|
|  Affected  |                       |  First Fixed Release  |
| 12.1-Based |  First Fixed Release  | for All Advisories in |
|  Releases  |                       |  the September 2011   |
|            |                       |  Bundled Publication  |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.1E      | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SXF               |
|------------+-----------------------+-----------------------|
|  Affected  |                       |  First Fixed Release  |
| 12.2-Based |  First Fixed Release  | for All Advisories in |
|  Releases  |                       |  the September 2011   |
|            |                       |  Bundled Publication  |
|------------+-----------------------+-----------------------|
| 12.2       | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2B      | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2BC     | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2BW     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2BX     | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SB                |
|------------+-----------------------+-----------------------|
| 12.2BY     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2BZ     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2CX     | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2CY     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2CZ     | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SB                |
|------------+-----------------------+-----------------------|
| 12.2DA     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2DD     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2DX     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2EU     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Releases up to and    |
| 12.2EW     | Not vulnerable        | including 12.2(20)EW4 |
|            |                       | are not vulnerable.   |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2EWA    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 12.2EX     | Not vulnerable        | 12.2(55)EX3           |
|------------+-----------------------+-----------------------|
| 12.2EY     | Not vulnerable        | 12.2(58)EY            |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; migrate   |
| 12.2EZ     | Not vulnerable        | to any release in     |
|            |                       | 15.0SE                |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2FX     | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SE                |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2FY     | Not vulnerable        | fixed in Release      |
|            |                       | 12.2EX                |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2FZ     | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SE                |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; migrate   |
| 12.2IRA    | Not vulnerable        | to any release in     |
|            |                       | 12.2IRG               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; migrate   |
| 12.2IRB    | Not vulnerable        | to any release in     |
|            |                       | 12.2IRG               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; migrate   |
| 12.2IRC    | Not vulnerable        | to any release in     |
|            |                       | 12.2IRG               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2IRD    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2IRE    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; migrate   |
| 12.2IRF    | Not vulnerable        | to any release in     |
|            |                       | 12.2IRG               |
|------------+-----------------------+-----------------------|
| 12.2IRG    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2IXA    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2IXB    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2IXC    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2IXD    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2IXE    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2IXF    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2IXG    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2IXH    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 12.2JA     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2JK     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2MB     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2MC     | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2MRA    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SRD               |
|------------+-----------------------+-----------------------|
| 12.2MRB    | Not vulnerable        | 12.2(33)MRB5          |
|------------+-----------------------+-----------------------|
|            |                       | Releases prior to     |
|            |                       | 12.2(30)S are         |
|            |                       | vulnerable; Releases  |
| 12.2S      | Not vulnerable        | 12.2(30)S and later   |
|            |                       | are not vulnerable.   |
|            |                       | First fixed in        |
|            |                       | Release 12.2SB        |
|------------+-----------------------+-----------------------|
| 12.2SB     | Not vulnerable        | 12.2(31)SB2012.2(33)  |
|            |                       | SB10                  |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SBC    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SB                |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SCA    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SCC               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SCB    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SCC               |
|------------+-----------------------+-----------------------|
| 12.2SCC    | Not vulnerable        | 12.2(33)SCC7          |
|------------+-----------------------+-----------------------|
| 12.2SCD    | Not vulnerable        | 12.2(33)SCD6          |
|------------+-----------------------+-----------------------|
| 12.2SCE    | Not vulnerable        | 12.2(33)SCE112.2(33)  |
|            |                       | SCE2                  |
|------------+-----------------------+-----------------------|
| 12.2SCF    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2SE     | Not vulnerable        | 12.2(55)SE312.2(58)SE |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SEA    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SE                |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SEB    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SE                |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SEC    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SE                |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SED    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SE                |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SEE    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SE                |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SEF    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SE                |
|------------+-----------------------+-----------------------|
|            |                       | Releases prior to     |
|            |                       | 12.2(25)SEG4 are      |
|            |                       | vulnerable; Releases  |
| 12.2SEG    | Not vulnerable        | 12.2(25)SEG4 and      |
|            |                       | later are not         |
|            |                       | vulnerable. First     |
|            |                       | fixed in Release      |
|            |                       | 12.2EX                |
|------------+-----------------------+-----------------------|
|            |                       | Releases prior to     |
|            |                       | 12.2(53)SG4 are       |
| 12.2SG     | Not vulnerable        | vulnerable; Releases  |
|            |                       | 12.2(53)SG4 and later |
|            |                       | are not vulnerable.   |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2SGA    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 12.2SL     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2SM     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 12.2SO     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2SQ     | Not vulnerable        | 12.2(50)SQ3           |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SRA    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SRD               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SRB    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SRD               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SRC    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SRD               |
|------------+-----------------------+-----------------------|
| 12.2SRD    | Not vulnerable        | 12.2(33)SRD6          |
|------------+-----------------------+-----------------------|
| 12.2SRE    | Not vulnerable        | 12.2(33)SRE4          |
|------------+-----------------------+-----------------------|
| 12.2STE    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2SU     | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
|            |                       | Releases prior to     |
|            |                       | 12.2(29a)SV are       |
|            |                       | vulnerable; Releases  |
| 12.2SV     | Not vulnerable        | 12.2(29a)SV and later |
|            |                       | are not vulnerable.   |
|            |                       | Migrate to any        |
|            |                       | release in 12.2SVD    |
|------------+-----------------------+-----------------------|
| 12.2SVA    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2SVC    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2SVD    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2SVE    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2SW     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SX     | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SXF               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SXA    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SXF               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SXB    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SXF               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SXD    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SXF               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SXE    | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SXF               |
|------------+-----------------------+-----------------------|
| 12.2SXF    | Not vulnerable        | 12.2(18)SXF17b        |
|------------+-----------------------+-----------------------|
| 12.2SXH    | Not vulnerable        | 12.2(33)SXH8a         |
|------------+-----------------------+-----------------------|
| 12.2SXI    | Not vulnerable        | 12.2(33)SXI6          |
|------------+-----------------------+-----------------------|
| 12.2SXJ    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2SY     | Not vulnerable        | 12.2(50)SY            |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2SZ     | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SB                |
|------------+-----------------------+-----------------------|
| 12.2T      | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2TPC    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 12.2XA     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XB     | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2XC     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XD     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XE     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XF     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XG     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XH     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XI     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XJ     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XK     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XL     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XM     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XN     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XNA    | See Cisco IOS-XE      | See Cisco IOS-XE      |
|            | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| 12.2XNB    | See Cisco IOS-XE      | See Cisco IOS-XE      |
|            | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| 12.2XNC    | See Cisco IOS-XE      | See Cisco IOS-XE      |
|            | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| 12.2XND    | See Cisco IOS-XE      | See Cisco IOS-XE      |
|            | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| 12.2XNE    | See Cisco IOS-XE      | See Cisco IOS-XE      |
|            | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| 12.2XNF    | See Cisco IOS-XE      | See Cisco IOS-XE      |
|            | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
|            |                       | Releases prior to     |
|            |                       | 12.2(54)XO are        |
| 12.2XO     | Not vulnerable        | vulnerable; Releases  |
|            |                       | 12.2(54)XO and later  |
|            |                       | are not vulnerable.   |
|------------+-----------------------+-----------------------|
| 12.2XQ     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XR     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XS     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XT     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XU     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XV     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2XW     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2YA     | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2YB     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2YC     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2YD     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2YE     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YF     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YG     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YH     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YJ     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 12.2YK     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YL     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 12.2YM     | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YN     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 12.2YO     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2YP     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YQ     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YR     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YS     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YT     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YU     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YV     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YW     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YX     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YY     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2YZ     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2ZA     | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SXF               |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2ZB     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 12.2ZC     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2ZD     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2ZE     | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2ZF     | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2ZG     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.2ZH     | Not vulnerable        | Vulnerable; First     |
|            |                       | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2ZJ     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2ZL     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 12.2ZP     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.2ZU     | Not vulnerable        | fixed in Release      |
|            |                       | 12.2SXH               |
|------------+-----------------------+-----------------------|
| 12.2ZX     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2ZY     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.2ZYA    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|  Affected  |                       |  First Fixed Release  |
| 12.3-Based |  First Fixed Release  | for All Advisories in |
|  Releases  |                       |  the September 2011   |
|            |                       |  Bundled Publication  |
|------------------------------------------------------------|
| There are no affected 12.3 based releases                  |
|------------------------------------------------------------|
|  Affected  |                       |  First Fixed Release  |
| 12.4-Based |  First Fixed Release  | for All Advisories in |
|  Releases  |                       |  the September 2011   |
|            |                       |  Bundled Publication  |
|------------+-----------------------+-----------------------|
| 12.4       | Not vulnerable        | 12.4(25f)             |
|------------+-----------------------+-----------------------|
| 12.4GC     | 12.4(24)GC4           | 12.4(24)GC4           |
|------------+-----------------------+-----------------------|
| 12.4JA     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4JAX    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4JDA    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4JDC    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4JHA    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4JHB    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4JHC    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4JK     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4JL     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4JMA    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4JMB    | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; migrate   |
|            |                       | to any release in     |
|            |                       | 12.4JA                |
| 12.4JX     | Not vulnerable        |                       |
|            |                       | Releases up to and    |
|            |                       | including 12.4(21a)JX |
|            |                       | are not vulnerable.   |
|------------+-----------------------+-----------------------|
| 12.4JY     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
| 12.4MD     | Not vulnerable        | 12.4(24)MD6 on        |
|            |                       | 28-Oct-2011           |
|------------+-----------------------+-----------------------|
| 12.4MDA    | Not vulnerable        | 12.4(24)MDA7          |
|------------+-----------------------+-----------------------|
| 12.4MDB    | Not vulnerable        | 12.4(24)MDB3          |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            | Releases up to and    | organization per the  |
| 12.4MR     | including 12.4(6)MR1  | instructions in the   |
|            | are not vulnerable.   | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            | Vulnerable; contact   | Vulnerable; contact   |
|            | your support          | your support          |
|            | organization per the  | organization per the  |
| 12.4MRA    | instructions in       | instructions in the   |
|            | Obtaining Fixed       | Obtaining Fixed       |
|            | Software section of   | Software section of   |
|            | this advisory.        | this advisory.        |
|------------+-----------------------+-----------------------|
|            | Vulnerable; First     | Vulnerable; First     |
| 12.4MRB    | fixed in Release      | fixed in Release      |
|            | 12.4T                 | 12.4T                 |
|------------+-----------------------+-----------------------|
| 12.4SW     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            | 12.4(24)T6            | 12.4(24)T6            |
| 12.4T      |                       |                       |
|            | 12.4(15)T16           | 12.4(15)T16           |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.4XA     | Not vulnerable        | fixed in Release      |
|            |                       | 12.4T                 |
|------------+-----------------------+-----------------------|
| 12.4XB     | Not vulnerable        | 12.4(2)XB12           |
|------------+-----------------------+-----------------------|
|            | Vulnerable; First     |                       |
| 12.4XC     | Fixed in Release      | Not vulnerable        |
|            | 12.4T                 |                       |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.4XD     | Not vulnerable        | fixed in Release      |
|            |                       | 12.4T                 |
|------------+-----------------------+-----------------------|
|            | Not vulnerable        |                       |
|            |                       |                       |
| 12.4XE     | Vulnerable; First     | Not vulnerable        |
|            | Fixed in Release      |                       |
|            | 12.4T                 |                       |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.4XF     | Not vulnerable        | fixed in Release      |
|            |                       | 12.4T                 |
|------------+-----------------------+-----------------------|
|            | Releases up to and    |                       |
|            | including 12.4(9)XG1  |                       |
|            | are not vulnerable.   |                       |
|            |                       | Vulnerable; First     |
| 12.4XG     | Releases 12.4(9)XG3   | fixed in Release      |
|            | and later are not     | 12.4T                 |
|            | vulnerable. First     |                       |
|            | fixed in Release      |                       |
|            | 12.4T                 |                       |
|------------+-----------------------+-----------------------|
|            | Not vulnerable        |                       |
|            |                       |                       |
| 12.4XJ     | Vulnerable; First     | Not vulnerable        |
|            | Fixed in Release      |                       |
|            | 12.4T                 |                       |
|------------+-----------------------+-----------------------|
| 12.4XK     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            | Vulnerable; contact   | Vulnerable; contact   |
|            | your support          | your support          |
|            | organization per the  | organization per the  |
| 12.4XL     | instructions in the   | instructions in the   |
|            | Obtaining Fixed       | Obtaining Fixed       |
|            | Software section of   | Software section of   |
|            | this advisory.        | this advisory.        |
|------------+-----------------------+-----------------------|
|            | Releases up to and    |                       |
|            | including 12.4(15)XM  |                       |
|            | are not vulnerable.   |                       |
|            |                       | Vulnerable; First     |
| 12.4XM     | Releases 12.4(15)XM3  | fixed in Release      |
|            | and later are not     | 12.4T                 |
|            | vulnerable. First     |                       |
|            | fixed in Release      |                       |
|            | 12.4T                 |                       |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.4XN     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.4XP     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.4XQ     | Not vulnerable        | fixed in Release      |
|            |                       | 12.4T                 |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.4XR     | Not vulnerable        | fixed in Release      |
|            |                       | 12.4T                 |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 12.4XT     | Not vulnerable        | fixed in Release      |
|            |                       | 12.4T                 |
|------------+-----------------------+-----------------------|
| 12.4XV     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            | Vulnerable; First     | Vulnerable; First     |
| 12.4XW     | fixed in Release      | fixed in Release      |
|            | 12.4T                 | 12.4T                 |
|------------+-----------------------+-----------------------|
|            | Vulnerable; First     | Vulnerable; First     |
| 12.4XY     | fixed in Release      | fixed in Release      |
|            | 12.4T                 | 12.4T                 |
|------------+-----------------------+-----------------------|
|            | Vulnerable; First     | Vulnerable; First     |
| 12.4XZ     | fixed in Release      | fixed in Release      |
|            | 12.4T                 | 12.4T                 |
|------------+-----------------------+-----------------------|
|            | Vulnerable; First     | Vulnerable; First     |
| 12.4YA     | fixed in Release      | fixed in Release      |
|            | 12.4T                 | 12.4T                 |
|------------+-----------------------+-----------------------|
|            | Vulnerable; contact   | Vulnerable; contact   |
|            | your support          | your support          |
|            | organization per the  | organization per the  |
| 12.4YB     | instructions in       | instructions in the   |
|            | Obtaining Fixed       | Obtaining Fixed       |
|            | Software section of   | Software section of   |
|            | this advisory.        | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.4YD     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; fixed in  |
|            |                       | 12.4(22)YE6 on        |
| 12.4YE     | Not vulnerable        | 30-Sept-2011; 12.4    |
|            |                       | (24)YE7 available on  |
|            |                       | 17-Oct-2011           |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 12.4YG     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|  Affected  |                       |  First Fixed Release  |
| 15.0-Based |  First Fixed Release  | for All Advisories in |
|  Releases  |                       |  the September 2011   |
|            |                       |  Bundled Publication  |
|------------+-----------------------+-----------------------|
| 15.0M      | 15.0(1)M7             | 15.0(1)M7             |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 15.0MR     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 15.0MRA    | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            | Not vulnerable        | 15.0(1)S4             |
|            |                       |                       |
| 15.0S      | Cisco IOS XE devices: | Cisco IOS XE devices: |
|            | See Cisco IOS-XE      | See Cisco IOS-XE      |
|            | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 15.0SA     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
| 15.0SE     | Not vulnerable        | Not vulnerable        |
|------------+-----------------------+-----------------------|
|            | Cisco IOS XE devices: | Cisco IOS XE devices: |
| 15.0SG     | See Cisco IOS-XE      | See Cisco IOS-XE      |
|            | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
|            | Vulnerable; First     | Vulnerable; First     |
| 15.0XA     | fixed in Release      | fixed in Release      |
|            | 15.1T                 | 15.1T                 |
|------------+-----------------------+-----------------------|
|            | Cisco IOS XE devices: | Cisco IOS XE devices: |
| 15.0XO     | See Cisco IOS-XE      | See Cisco IOS-XE      |
|            | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
|  Affected  |                       |  First Fixed Release  |
| 15.1-Based |  First Fixed Release  | for All Advisories in |
|  Releases  |                       |  the September 2011   |
|            |                       |  Bundled Publication  |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 15.1EY     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            | Vulnerable; First     | Vulnerable; First     |
| 15.1GC     | fixed in Release      | fixed in Release      |
|            | 15.1T                 | 15.1T                 |
|------------+-----------------------+-----------------------|
| 15.1M      | 15.1(4)M1             | 15.1(4)M2; Available  |
|            |                       | on 30-SEP-11          |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; contact   |
|            |                       | your support          |
|            |                       | organization per the  |
| 15.1MR     | Not vulnerable        | instructions in the   |
|            |                       | Obtaining Fixed       |
|            |                       | Software section of   |
|            |                       | this advisory.        |
|------------+-----------------------+-----------------------|
|            |                       | 15.1(2)S2             |
|            | Not vulnerable        |                       |
|            |                       | 15.1(3)S              |
| 15.1S      | Cisco IOS XE devices: |                       |
|            | See Cisco IOS-XE      | Cisco IOS XE devices: |
|            | Software Availability | See Cisco IOS-XE      |
|            |                       | Software Availability |
|------------+-----------------------+-----------------------|
|            | 15.1(2)T4             | 15.1(2)T4 15.1(1)T4   |
| 15.1T      |                       | on 8-Dec-2011         |
|            | 15.1(3)T2             |                       |
|------------+-----------------------+-----------------------|
|            |                       | Vulnerable; First     |
| 15.1XB     | 15.1(4)XB5            | fixed in Release      |
|            |                       | 15.1T                 |
|------------+-----------------------+-----------------------|
|  Affected  |                       |  First Fixed Release  |
| 15.2-Based |  First Fixed Release  | for All Advisories in |
|  Releases  |                       |  the September 2011   |
|            |                       |  Bundled Publication  |
|------------------------------------------------------------|
| There are no affected 15.2 based releases                  |
+------------------------------------------------------------+

Cisco IOS XE Software
+--------------------

+------------------------------------------------------------+
|  Cisco   |   First    |    First Fixed Release for All     |
|  IOS XE  |   Fixed    |  Advisories in the September 2011  |
| Release  |  Release   |        Bundled Publication         |
|----------+------------+------------------------------------|
| 2.1.x    | Not        | Vulnerable; migrate to 3.3.2S or   |
|          | Vulnerable | later                              |
|----------+------------+------------------------------------|
| 2.2.x    | Not        | Vulnerable; migrate to 3.3.2S or   |
|          | Vulnerable | later                              |
|----------+------------+------------------------------------|
| 2.3.x    | Not        | Vulnerable; migrate to 3.3.2S or   |
|          | Vulnerable | later                              |
|----------+------------+------------------------------------|
| 2.4.x    | Not        | Vulnerable; migrate to 3.3.2S or   |
|          | Vulnerable | later                              |
|----------+------------+------------------------------------|
| 2.5.x    | 3.1.3S     | Vulnerable; migrate to 3.3.2S or   |
|          |            | later                              |
|----------+------------+------------------------------------|
| 2.6.x    | 3.1.3S     | Vulnerable; migrate to 3.3.2S or   |
|          |            | later                              |
|----------+------------+------------------------------------|
| 3.1.xS   | 3.1.3S     | Vulnerable; migrate to 3.3.2S or   |
|          |            | later                              |
|----------+------------+------------------------------------|
| 3.1.xSG  | Not        | Vulnerable; migrate to 3.2.0SG or  |
|          | vulnerable | later                              |
|----------+------------+------------------------------------|
| 3.2.xS   | 3.2.1S     | Vulnerable; migrate to 3.3.2S or   |
|          |            | later                              |
|----------+------------+------------------------------------|
| 3.2.xSG  | Not        | Not vulnerable                     |
|          | vulnerable |                                    |
|----------+------------+------------------------------------|
| 3.3.xS   | Not        | 3.3.2S                             |
|          | Vulnerable |                                    |
|----------+------------+------------------------------------|
| 3.4.xS   | Not        | Not Vulnerable                     |
|          | Vulnerable |                                    |
+------------------------------------------------------------+

For mapping of Cisco IOS XE to Cisco IOS releases, please refer to
the Cisco IOS XE 2 Release Notes, Cisco IOS XE 3S Release Notes, and
Cisco IOS XE 3SG Release Notes.

Cisco IOS XR System Software
+---------------------------

Cisco IOS XR Software is not affected by any of the vulnerabilities
in the September 2011 bundled publication.

Workarounds
===========

If the affected Cisco IOS device requires SIP for VoIP services, SIP
cannot be disabled and no workarounds are available. Users are
advised to apply mitigation techniques to help limit exposure to the
vulnerabilities. Mitigation consists of allowing only legitimate
devices to connect to affected devices. To increase effectiveness,
the mitigation must be coupled with measures against spoofing on the
network edge. This action is required because SIP can use UDP as the
transport protocol.

Additional mitigations that can be deployed on Cisco
devices within the network are available in the companion
document "Cisco Applied Mitigation Bulletin:Identifying and
Mitigating Exploitation of the Multiple Vulnerabilities
in Cisco Voice Products" at the following location:
http://www.cisco.com/warp/public/707/cisco-amb-20110928-voice.shtml.

Disabling SIP Listening Ports
+----------------------------

For devices that do not require SIP to be enabled, the simplest and
most effective workaround is to disable SIP processing on the device.
Some versions of Cisco IOS Software allow administrators to disable
SIP with the following commands:

    sip-ua
     no transport udp
     no transport tcp
     no transport tcp tls

Warning: When applying this workaround to devices that are processing
Media Gateway Control Protocol (MGCP) or H.323 calls, the device will
not stop SIP processing while active calls are being processed. Under
these circumstances, this workaround should be implemented during a
maintenance window when active calls can be briefly stopped.

The "show udp connections", "show tcp brief all", and "show processes |
include SIP" commands can be used to confirm that the SIP UDP and TCP
ports are closed after applying this workaround.

Depending on the Cisco IOS Software version in use, when SIP is
disabled, the output from the "show ip sockets" command may still show
the SIP ports open, but sending traffic to them will cause the SIP
process to display the following message:

    *Jun 2 11:36:47.691: sip_udp_sock_process_read: SIP UDP Listener is DISABLED

Control Plane Policing
+---------------------

For devices that need to offer SIP services, it is possible to use
Control Plane Policing (CoPP) to block SIP traffic to the device from
untrusted sources. Cisco IOS Releases 12.0S, 12.2SX, 12.2S, 12.3T,
12.4, and 12.4T support the CoPP feature. CoPP may be configured on a
device to protect the management and control planes to minimize the
risk and effectiveness of direct infrastructure attacks by explicitly
permitting only authorized traffic sent to infrastructure devices in
accordance with existing security policies and configurations. The
following example can be adapted to specific network configurations:

    !-- The 192.168.1.0/24 network and the 172.16.1.1 host are trusted.
    !-- Everything else is not trusted. The following access list is used
    !-- to determine what traffic needs to be dropped by a control plane
    !-- policy (the CoPP feature): if the access list matches (permit)
    !-- then traffic will be dropped and if the access list does not
    !-- match (deny) then traffic will be processed by the router.
    access-list 100 deny udp 192.168.1.0 0.0.0.255 any eq 5060
    access-list 100 deny tcp 192.168.1.0 0.0.0.255 any eq 5060
    access-list 100 deny tcp 192.168.1.0 0.0.0.255 any eq 5061
    access-list 100 deny udp host 172.16.1.1 any eq 5060
    access-list 100 deny tcp host 172.16.1.1 any eq 5060
    access-list 100 deny tcp host 172.16.1.1 any eq 5061
    access-list 100 permit udp any any eq 5060
    access-list 100 permit tcp any any eq 5060
    access-list 100 permit tcp any any eq 5061

    !-- Permit (Police or Drop)/Deny (Allow) all other Layer3 and Layer4
    !-- traffic in accordance with existing security policies and
    !-- configurations for traffic that is authorized to be sent
    !-- to infrastructure devices.
    !-- Create a Class-Map for traffic to be policed by
    !-- the CoPP feature.
    class-map match-all drop-sip-class
      match access-group 100

    !-- Create a Policy-Map that will be applied to the
    !-- Control-Plane of the device.
    policy-map control-plane-policy
     class drop-sip-class
      drop

    !-- Apply the Policy-Map to the Control-Plane of the
    !-- device.
    control-plane
     service-policy input control-plane-policy

Note: Because SIP can use UDP as a transport protocol, it is possible
to spoof the source address of an IP packet, which may bypass access
control lists that permit communication to these ports from trusted
IP addresses.

In the preceding CoPP example, the access control entries (ACEs) that
match the potential exploit packets with the permit action cause these
packets to be discarded by the policy-map drop function, whereas
packets that match the deny action (not shown) are not affected by the
policy-map drop function. Additional information on the configuration
and use of the CoPP feature can be found at
http://www.cisco.com/web/about/security/intelligence/coppwp_gs.html and
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtrtlimt.html.

Obtaining Fixed Software
========================

Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.

Customers may only install and expect support for the feature
sets they have purchased. By installing, downloading, accessing
or otherwise using such software upgrades, customers agree to be
bound by the terms of Cisco's software license terms found at
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html,
or as otherwise set forth at Cisco.com Downloads at
http://www.cisco.com/public/sw-center/sw-usingswc.shtml.

Do not contact psirt@xxxxxxxxx or security-alert@xxxxxxxxx for
software upgrades.

Customers with Service Contracts
+-------------------------------

Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.

Customers using Third Party Support Organizations
+------------------------------------------------

Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.

The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.

Customers without Service Contracts
+----------------------------------

Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.

  * +1 800 553 2447 (toll free from within North America)
  * +1 408 526 7209 (toll call from anywhere in the world)
  * e-mail: tac@xxxxxxxxx

Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.

Refer to
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.

Exploitation and Public Announcements
=====================================

The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerabilities described in this advisory.

These vulnerabilities were discovered by Cisco during internal
testing.

Status of this Notice: FINAL
============================

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.

Distribution
============

This advisory is posted on Cisco's worldwide website at:

http://www.cisco.com/warp/public/707/cisco-sa-20110928-sip.shtml

In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.

  * cust-security-announce@xxxxxxxxx
  * first-bulletins@xxxxxxxxxxxxxxx
  * bugtraq@xxxxxxxxxxxxxxxxx
  * vulnwatch@xxxxxxxxxxxxx
  * cisco@xxxxxxxxxxxxxxxxx
  * cisco-nsp@xxxxxxxxxxxxxxx
  * full-disclosure@xxxxxxxxxxxxxxxxx
  * comp.dcom.sys.cisco@xxxxxxxxxxxxxxxxxx

Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.

Revision History
================

+------------------------------------------------------------+
| Revision 1.0 | 2011-September-28 | Initial public release. |
+------------------------------------------------------------+

Cisco Security Procedures
=========================

Complete information on reporting security vulnerabilities
in Cisco products, obtaining assistance with security
incidents, and registering to receive security information
from Cisco, is available on Cisco's worldwide website at
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html.
This includes instructions for press inquiries regarding
Cisco security notices. All Cisco security advisories are available at
http://www.cisco.com/go/psirt.

+--------------------------------------------------------------------
Copyright 2010-2011 Cisco Systems, Inc. All rights reserved.
+--------------------------------------------------------------------

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