full-disclosure - [ GLSA 200803-24 ] PCRE: Buffer overflow

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Message-ID: <47DF0D94.3030708@gentoo.org>
Date: Tue, 18 Mar 2008 01:32:20 +0100
From: Tobias Heinlein <keytoaster@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200803-24 ] PCRE: Buffer overflow

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Gentoo Linux Security Advisory                        GLSA 200803-24:02
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                                            http://security.gentoo.org/
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  Severity: High
     Title: PCRE: Buffer overflow
      Date: March 17, 2008
   Updated: March 17, 2008
      Bugs: #209067, #209293
        ID: 200803-24:02

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Synopsis
========

A buffer overflow vulnerability has been discovered in PCRE, allowing
for the execution of arbitrary code and Denial of Service.

Background
==========

PCRE is a Perl-compatible regular expression library. GLib includes a
copy of PCRE.

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

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  dev-libs/libpcre      < 7.6-r1                          >= 7.6-r1
  2  dev-libs/glib         < 2.14.6                          >= 2.14.6
                                                              < 2.14.0
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

PCRE contains a buffer overflow vulnerability when processing a
character class containing a very large number of characters with
codepoints greater than 255.

Impact
======

A remote attacker could exploit this vulnerability by sending a
specially crafted regular expression to an application making use of
the PCRE library, which could possibly lead to the execution of
arbitrary code or a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All PCRE users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/libpcre-7.6-r1"

All GLib users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/glib-2.14.6"

References
==========

  [ 1 ] CVE-2008-0674
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0674

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

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

  http://security.gentoo.org/glsa/glsa-200803-24.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@...too.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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