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[RedHat] Schwachstellen im ISAKMP daemon - RHSA-2004:165-01

To: win-sec-ssc@xxxxxxxxxxx
Subject: [RedHat] Schwachstellen im ISAKMP daemon - RHSA-2004:165-01
From: win-sec-ssc@xxxxxxxxxxx
Date: Wed, 12 May 2004 17:57:11 +0200 (CEST)
Delivery-date: Wed, 12 May 2004 17:31:35 +0200
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Resent-date: Wed, 12 May 2004 17:31:35 +0200
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-----BEGIN PGP SIGNED MESSAGE-----

Liebe Kolleginnen und Kollegen,

soeben erreichte uns nachfolgendes RedHat Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.

IKE (Internet Key Exchange) wird bei IPsec fuer den Austausch von
kryptografischen Schluesseln verwendet.

CAN-2004-0155 - Schwachstelle in IPsec/IKE

  Der IKE-Daemon racoon ueberprueft unter Umstaenden lediglich das
  Zertifikat des Clients, aber benutzt dieses nicht, um die Signatur des
  Clients zu ueberpruefen.

CAN-2004-0164 - Schwachstelle in IPsec/IKE

  Ein Fehler im KAME IKE daemon racoon erlaubt es einem entfernten
  Angreifer, SAs (Security Associations) einer bestehenden IPsec
  Verbindung zu loeschen.

CAN-2004-0403 - Schwachstelle in IPsec/IKE

  Wenn der IKE-Daemon racoon einen ISAKMP Header empfaengt, reserviert
  er einen Speicherbereich, der von der Laengenangabe im Header
  abhaengt. Ein entfernter Angreifer kann diese Schwachstelle durch
  entsprechend konstruierte ISAKMP Pakete mit gefaelschter Laengenangabe
  fuer einen Denial of Service Angriff ausnuzten.


Betroffen sind die folgenden Software Pakete und Plattformen:

  ipsec-tools

in

  Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x,
  x86_64
  
  Red Hat Enterprise Linux ES version 3 - i386
  
  Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

(c) der deutschen Zusammenfassung bei DFN-CERT Services GmbH; die
Verbreitung, auch auszugsweise, ist nur unter Hinweis auf den Urheber,
DFN-CERT Services GmbH, und nur zu nicht kommerziellen Zwecken
gestattet.

Mit freundlichen Gruessen,


           Jan Kohlrausch, DFN-CERT

- --
Jan Kohlrausch (CSIRT), DFN-CERT Services GmbH
Web: https://www.dfn-cert.de/, Phone: +49-40-808077-555
PGP RSA/2048, A5DD03D1, A2 55 1C 51 0A 30 3E 78  5B 40 DA B7 14 F7 C9 E8


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Hash: SHA1

- - ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Updated ipsec-tools package fixes vulnerabilities in ISAKMP daemon
Advisory ID:       RHSA-2004:165-01
Issue date:        2004-05-11
Updated on:        2004-05-11
Product:           Red Hat Enterprise Linux
Keywords:          SA x509
Cross references:  
Obsoletes:         
CVE Names:         CAN-2004-0155 CAN-2004-0164 CAN-2004-0403
- - ---------------------------------------------------------------------

1. Topic:

An updated ipsec-tools package that fixes vulnerabilities in racoon (the
ISAKMP daemon) is now available.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux ES version 3 - i386
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64

3. Problem description:

IPSEC uses strong cryptography to provide both authentication and
encryption services.

With versions of ipsec-tools prior to 0.2.3, it was possible for an
attacker to cause unauthorized deletion of SA (Security Associations.)
The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2004-0164 to this issue.

With versions of ipsec-tools prior to 0.2.5, the RSA signature on x.509
certificates was not properly verified when using certificate based
authentication.  The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2004-0155 to this issue.

When ipsec-tools receives an ISAKMP header, it will attempt to allocate
sufficient memory for the entire ISAKMP message according to the header's
length field. If an attacker crafts an ISAKMP header with a extremely large
value in the length field, racoon may exceed operating system resource
limits and be terminated, resulting in a denial of service.  The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CAN-2004-0403 to this issue.

User of IPSEC should upgrade to this updated package, which contains
ipsec-tools version 0.25 along with a security patch for CAN-2004-0403
which resolves all these issues.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those
RPMs which are currently installed will be updated.  Those RPMs which are
not installed but included in the list will not be updated.  Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network.  Many
people find this an easier way to apply updates.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL
Certificate Errors, you need to install a version of the
up2date client with an updated certificate.  The latest version of
up2date is available from the Red Hat FTP site and may also be
downloaded directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

120253 - CAN-2004-0155/CAN-2004-0164 KAME racoon issues

6. RPMs required:

Red Hat Enterprise Linux AS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/ipsec-tools-0.2.5-0.4.src.rpm

i386:
Available from Red Hat Network: ipsec-tools-0.2.5-0.4.i386.rpm

ia64:
Available from Red Hat Network: ipsec-tools-0.2.5-0.4.ia64.rpm

ppc:
Available from Red Hat Network: ipsec-tools-0.2.5-0.4.ppc.rpm

s390:
Available from Red Hat Network: ipsec-tools-0.2.5-0.4.s390.rpm

s390x:
Available from Red Hat Network: ipsec-tools-0.2.5-0.4.s390x.rpm

x86_64:
Available from Red Hat Network: ipsec-tools-0.2.5-0.4.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/ipsec-tools-0.2.5-0.4.src.rpm

i386:
Available from Red Hat Network: ipsec-tools-0.2.5-0.4.i386.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/ipsec-tools-0.2.5-0.4.src.rpm

i386:
Available from Red Hat Network: ipsec-tools-0.2.5-0.4.i386.rpm

ia64:
Available from Red Hat Network: ipsec-tools-0.2.5-0.4.ia64.rpm

x86_64:
Available from Red Hat Network: ipsec-tools-0.2.5-0.4.x86_64.rpm



7. Verification:

MD5 sum                          Package Name
- - --------------------------------------------------------------------------
819a52723fa5a2d7033f8f1bb3cc7a60 ipsec-tools-0.2.5-0.4.i386.rpm
c5e7c8d9795830b279cda5788bec8c4f ipsec-tools-0.2.5-0.4.ia64.rpm
f00e5a71c14bffad7888e6f9592d1f51 ipsec-tools-0.2.5-0.4.ppc.rpm
058c2463f7d1b93640d17fafbf952238 ipsec-tools-0.2.5-0.4.s390.rpm
86753b7e9ca3cecb383c65507a2964e6 ipsec-tools-0.2.5-0.4.s390x.rpm
6ada9a100876ea9ed4b5ead7c4364ab0 ipsec-tools-0.2.5-0.4.src.rpm
59be1182425e6f7442ee20679263ef35 ipsec-tools-0.2.5-0.4.x86_64.rpm


These packages are GPG signed by Red Hat for security.  Our key is
available from https://www.redhat.com/security/team/key.html

You can verify each package with the following command:
    
    rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
    
    md5sum <filename>


8. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0155
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0164
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0403

9. Contact:

The Red Hat security contact is <secalert@xxxxxxxxxx>.  More contact
details at https://www.redhat.com/security/team/contact.html

Copyright 2004 Red Hat, Inc.
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