[ GLSA 200904-08 ] OpenSSL: Denial of Service

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Gentoo Linux Security Advisory                           GLSA 200904-08
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: OpenSSL: Denial of Service
      Date: April 07, 2009
      Bugs: #263751
        ID: 200904-08

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Synopsis
========

An error in OpenSSL might allow for a Denial of Service when printing
certificate details.

Background
==========

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer
(SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general
purpose cryptography library.

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

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  dev-libs/openssl      < 0.9.8k                          >= 0.9.8k

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

The ASN1_STRING_print_ex() function does not properly check the
provided length of a BMPString or UniversalString, leading to an
invalid memory access.

Impact
======

A remote attacker could entice a user or automated system to print a
specially crafted certificate, possibly leading to a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSSL users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8k"

References
==========

  [ 1 ] CVE-2009-0590
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0590

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

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

  http://security.gentoo.org/glsa/glsa-200904-08.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 2009 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