[ GLSA 200904-08 ] OpenSSL: Denial of Service

[Robert Buchholz <rbu () gentoo org>]

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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

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