[ GLSA 200803-24 ] PCRE: Buffer overflow

[Tobias Heinlein <keytoaster () gentoo org>]

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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 () 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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