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UNIRAS Brief - 701/06 - Three iDefense Security Advisories:



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______________________________________________________________________________

 UNIRAS (UK Government CERT) Briefing - 701/06 dated 01.11.06 time 13:55
 UNIRAS is part of NISCC (the UK National Infrastructure Security
 Co-ordination Centre)
______________________________________________________________________________

 UNIRAS material is available from the NISCC website at www.niscc.gov.uk
______________________________________________________________________________

Title
=====

Three iDefense Security Advisories:

1. 10.27.06: Novell eDirectory NMAS BerDecodeLoginDataRequeset DoS Vulnerability

2. 10.31.06: Sophos Anti-Virus Petite File Denial of Service Vulnerability

3. 10.31.06: NovelliManager Tomcat DoS Vulnerability

Detail
======

1. Remote exploitation of a denial of service (DoS) vulnerability in Novell
Inc.'s eDirectory product could allow an attacker to force the running
daemon to cease servicing requests.

2. Remote exploitation of a denial of service vulnerability in version 5.1
of Sophos Anti-Virus could result in unusable system conditions.

3. Remote exploitation of a DoS vulnerability in Novell Inc.'s iManager
could allow attackers to crash the iManager Tomcat server.




1.



Novell eDirectory NMAS BerDecodeLoginDataRequeset DoS Vulnerability

iDefense Security Advisory 10.27.06
http://www.idefense.com/intelligence/vulnerabilities/
Oct 27, 2006

I. BACKGROUND

Novell eDirectory is a cross-platform lightweight directory access
protocol (LDAP) server. Additionally, eDirectory implements NMAS which
stands for Novell Modular Authentication System. More information can be
found on Novell's web site at http://www.novell.com/products/edirectory/

II. DESCRIPTION

Remote exploitation of a denial of service (DoS) vulnerability in Novell
Inc.'s eDirectory product could allow an attacker to force the running
daemon to cease servicing requests.

The problem specifically exists due to a pointer handling mistake within
the BerDecodeLoginDataRequest function within the libnmasldap.so module.
When a specially crafted login request is encountered, this function
loops based on a length value supplied in the request. In this loop, a
nested pointer value is incremented at the wrong level. This results in
a buffer length parameter that is on the stack being used as a memory
address for ber_get_int(). This value does not appear to be influenced
in any way by attacker supplied input. Invalid memory access will lead
to a segmentation violation, crashing the process.

III. ANALYSIS

Successful exploitation of this vulnerability could allow an attacker to
crash the server process. No credentials are required.

IV. DETECTION

iDefense has confirmed the existence of this vulnerability within versions
8.8 and 8.8.1 of Novell's eDirectory product. The vulnerability was
tested
and confirmed to exist on both Linux and Solaris.

V. WORKAROUND

iDefense is unaware of any viable workaround for this issue.

VI. VENDOR RESPONSE

Novell has addressed this issue in version 2.0.3 of Security Services.
To obtain the updated version please refer to the following quoted
vendor response:

"Search for "Security Services" at the Novell Downloads Web site
(http://download.novell.com) and download the necessary platform-specific
download for the Security Services 2.0.3 patch.

    * For NetWare - select ss203_NW.tgz
    * For Linux, Solaris, HP-UX, and AIX - select ss203_SLAH.tgz
    * For Windows - select ss_setup.exe"

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2006-4521 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

08/17/2006  Initial vendor notification
08/18/2006  Initial vendor response
10/06/2006  Second vendor notification
10/27/2006  Coordinated public disclosure

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

Get paid for vulnerability research
http://www.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events
http://labs.idefense.com/

X. LEGAL NOTICES

Copyright C 2006 iDefense, Inc.

Permission is granted for the redistribution of this alert electronically.
It may not be edited in any way without the express written consent of
iDefense. If you wish to reprint the whole or any part of this alert in
any other medium other than electronically, please email
customerservice@xxxxxxxxxxxx for permission.

Disclaimer: The information in the advisory is believed to be accurate at
the time of publishing based on currently available information. Use of
the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on, this
information.



2.


Sophos Anti-Virus Petite File Denial of Service Vulnerability

iDefense Security Advisory 10.31.06
http://www.idefense.com/intelligence/vulnerabilities/
Oct 31, 2006

I. BACKGROUND

Sophos Anti-Virus is comprehensive scanning solution used to protect
users from viruses, malicious code, ad-ware, trojans, and more. For more
information see their website at http://sophos.com/

II. DESCRIPTION

Remote exploitation of a denial of service vulnerability in version 5.1
of Sophos Anti-Virus could result in unusable system conditions.

The problem manifests itself when the scanning engine encounters an
executable compressed with petite that contains a large number of
sections.

III. ANALYSIS

Successful exploitation would result in the scanning engine attempting
to allocate an extremely large amount of memory resulting in memory
exhaustion on the system in question. The auto-scan features of Sophos
Anti-Virus will attempt to scan files on access.

IV. DETECTION

iDefense has confirmed the existence of this issue with Sophos Anti-Virus
5.1 for Windows as well as version 5 for Linux. It is suspected that
earlier versions and other architectures are also vulnerable.

V. WORKAROUND

iDefense is unaware for any effective workarounds for this issue.

VI. VENDOR RESPONSE

Sophos recommends upgrading to an unaffected version of the scan engine.
For more information consult the following support article.
http://www.sophos.com/support/knowledgebase/article/7609.html

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2006-4839 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

09/15/2006  Initial vendor notification
09/19/2006  Initial vendor response
10/31/2006  Coordinated public disclosure

IX. CREDIT

This vulnerability was reported to iDefense by Damian Put
<pucik@xxxxxxxxxxx>.

Get paid for vulnerability research
http://www.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events
http://labs.idefense.com/

X. LEGAL NOTICES

Copyright C 2006 iDefense, Inc.

Permission is granted for the redistribution of this alert electronically.
It may not be edited in any way without the express written consent of
iDefense. If you wish to reprint the whole or any part of this alert in
any other medium other than electronically, please email
customerservice@xxxxxxxxxxxx for permission.

Disclaimer: The information in the advisory is believed to be accurate at
the time of publishing based on currently available information. Use of
the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on, this
information.




3. 



Novell iManager Tomcat DoS Vulnerability

iDefense Security Advisory 10.31.06
http://www.idefense.com/intelligence/vulnerabilities/
Oct 31, 2006

I. BACKGROUND

iManager is a management portal for Novell's eDirectory server. More
information about iManager is available at the link shown.

    http://www.novell.com/products/consoles/imanager/overview.html

II. DESCRIPTION

Remote exploitation of a DoS vulnerability in Novell Inc.'s iManager
could allow attackers to crash the iManager Tomcat server.

The vulnerability specifically exists due to improper handling of a an
HTTP POST request with a long TREE parameter. When such a request is
received, a NULL pointer dereference occurs, leading to a crash of the
service. iDefense Labs testing has indicated that any string longer than
256 bytes will be effective.

III. ANALYSIS

Exploitation requires that an attacker send a specially constructed HTTP
request to the server. This crashes the server, making it unusable until
it is restarted.

IV. DETECTION

iDefense has confirmed this vulnerability in Novell iManager 2.5. All
previous versions are suspected vulnerable.

V. WORKAROUND

iDefense is currently unaware of any workarounds for this issue.

VI. VENDOR RESPONSE

Novell has addressed this vulnerability within iManager version 2.6.
Upgrading to this version will alleviate exposure to the vulnerability.

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2006-4517 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

08/17/2006  Initial vendor notification
08/18/2006  Initial vendor response
10/06/2006  Second vendor notification
10/31/2006  Coordinated public disclosure

IX. CREDIT

This vulnerability was reported to iDefense by CIRT.DK.

Get paid for vulnerability research
http://www.idefense.com/methodology/vulnerability/vcp.php

Free tools, research and upcoming events
http://labs.idefense.com/

X. LEGAL NOTICES

Copyright C 2006 iDefense, Inc.

Permission is granted for the redistribution of this alert electronically.
It may not be edited in any way without the express written consent of
iDefense. If you wish to reprint the whole or any part of this alert in
any other medium other than electronically, please email
customerservice@xxxxxxxxxxxx for permission.

Disclaimer: The information in the advisory is believed to be accurate at
the time of publishing based on currently available information. Use of
the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on, this
information.


______________________________________________________________________________

NISCC values your feedback.

1. Which of the following most reflects the value of the briefing to you?
(Place an 'X' next to your choice)

Very useful:__ Useful:__ Not useful:__ 

2. If you did not find it useful, why not?


3. Any other comments? How could we improve our briefings?


Thank you for your contribution.
______________________________________________________________________________

For additional information or assistance, please contact our help desk
by telephone.  You may send Not Protectively Marked information via
e-mail to uniras@xxxxxxxxxxxxx

Office hours:

Mon - Fri: 08:30 - 17:00 hours
Tel: +44 (0) 870 487 0748 and follow the voice prompts
Fax: +44 (0) 870 487 0749

On-call duty officer outside office hours:
Tel: +44 (0) 870 487 0748 and follow the voice prompts

______________________________________________________________________________

UNIRAS wishes to acknowledge the contributions of iDefense for the
information contained in this briefing.
______________________________________________________________________________

This notice contains information released by the original author.
Some of the information may have changed since it was released. If the
vulnerability affects you, it may be prudent to retrieve the advisory
from the site of the original source to ensure that you receive the most
current information concerning that problem.

Reference to any specific commercial product, process, or service by
trade name, trademark manufacturer, or otherwise, does not constitute or
imply its endorsement, recommendation, or favouring by UNIRAS or NISCC.
The views and opinions of authors expressed within this notice shall not
be used for advertising or product endorsement purposes.

Neither UNIRAS or NISCC shall also accept responsibility for any errors
or omissions contained within this briefing notice. In particular, they
shall not be liable for any loss or damage whatsoever, arising from or
in connection with the usage of information contained within this
notice.

UNIRAS is a member of the Forum of Incident Response and Security Teams
(FIRST) and has contacts with other international Incident Response
Teams (IRTs) in order to foster cooperation and coordination in incident
prevention, to prompt rapid reaction to incidents, and to promote
information sharing amongst its members and the community at large.
______________________________________________________________________________

<End of UNIRAS Briefing>

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