Gentoo Linux Security Advisory                           GLSA 200404-11
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                                              http://security.gentoo.org
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  Severity: High
     Title: Multiple Vulnerabilities in pwlib

      Date: April 09, 2004
      Bugs: #45846
        ID: 200404-11

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Synopsis
========

Multiple vulnerabilites have been found in pwlib that may lead to a
remote denial of service or buffer overflow attack.

Background
==========

pwlib is a multi-platform library designed for OpenH323.

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

    -------------------------------------------------------------------
     Package         /    Vulnerable    /                     Unaffected
    -------------------------------------------------------------------
     dev-libs/pwlib       <= 1.5.2-r2                        >= 1.5.2-r3

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

Multiple vulnerabilities have been found in the implimentation of
protocol H.323 contained in pwlib. Most of the vulnerabilies are in the
parsing of ASN.1 elements which would allow an attacker to use a
maliciously crafted ASN.1 element to cause unpredictable behavior in
pwlib.

Impact
======

An attacker may cause a denial of service condition or cause a buffer
overflow that would allow arbitrary code to be executed with root
privileges.

Workaround
==========

Blocking ports 1719 and 1720 may reduce the likelihood of an attack.
All users are advised to upgrade to the latest version of the affected
package.

Resolution
==========

All pwlib users are advised to upgrade to version 1.5.2-r3 or later:

    # emerge sync

    # emerge -pv ">=dev-libs/pwlib-1.5.2-r3"
    # emerge ">=dev-libs/pwlib-1.5.2-r3"

References
==========

  [ 1 ]  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0097
  [ 2 ]  http://www.uniras.gov.uk/vuls/2004/006489/h323.htm

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

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

      http://security.gentoo.org/glsa/glsa-200404-11.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 2004 Gentoo Technologies, 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/1.0