[ GLSA 200804-27 ] SILC: Multiple vulnerabilities

[Tobias Heinlein <keytoaster () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200804-27
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: SILC: Multiple vulnerabilities
      Date: April 24, 2008
      Bugs: #212362, #214116, #214812
        ID: 200804-27

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Synopsis
========

Multiple vulnerabilities were found in SILC Client, Server, and
Toolkit, allowing for Denial of Service and execution of arbitrary
code.

Background
==========

SILC (Secure Internet Live Conferencing protocol) Toolkit is a software
development kit for use in clients, SILC Server is a communication
server, and SILC Client is an IRSSI-based text client.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /  Vulnerable  /                  Unaffected
    -------------------------------------------------------------------
  1  net-im/silc-toolkit       < 1.1.7                        >= 1.1.7
  2  net-im/silc-client        < 1.1.4                        >= 1.1.4
  3  net-im/silc-server        < 1.1.2                        >= 1.1.2
    -------------------------------------------------------------------
     3 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

Description
===========

* Nathan G. Grennan reported a boundary error in SILC Toolkit within
  the silc_fingerprint() function in the file lib/silcutil/silcutil.c
  when passing overly long data, resulting in a stack-based buffer
  overflow (CVE-2008-1227).

* A vulnerability has been reported in SILC Server which is caused
  due to an error in the handling of "NEW_CLIENT" packets that do not
  contain a nickname (CVE-2008-1429).

* Ariel Waissbein, Pedro Varangot, Martin Mizrahi, Oren Isacson,
  Carlos Garcia, and Ivan Arce of Core Security Technologies reported
  that SILC Client, Server, and Toolkit contain a vulnerability in the
  silc_pkcs1_decode() function in the silccrypt library (silcpkcs1.c),
  resulting in an integer underflow, signedness error, and a buffer
  overflow (CVE-2008-1552).

Impact
======

A remote attacker could exploit these vulnerabilities to cause a Denial
of Service or execute arbitrary code with the privileges of the user
running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All SILC Toolkit users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-im/silc-toolkit-1.1.7"

All SILC Client users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-im/silc-client-1.1.4"

All SILC Server users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-im/silc-server-1.1.2"

References
==========

  [ 1 ] CVE-2008-1227
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1227
  [ 2 ] CVE-2008-1429
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1429
  [ 3 ] CVE-2008-1552
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1552

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200804-27.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security () gentoo org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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