GLSA 200807-03 PCRE: Buffer overflow

Gentoo Linux Security Advisory GLSA 200807-03
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http://security.gentoo.org/
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Severity: High
Title: PCRE: Buffer overflow
Date: July 07, 2008
Bugs: #228091, #230039
ID: 200807-03

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Synopsis
========

A buffer overflow vulnerability has been discovered in PCRE, allowing
for the execution of arbitrary code and a 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 lt; 7.7-r1 gt;= 7.7-r1
2 dev-libs/glib lt; 2.16.3-r1 gt;= 2.16.3-r1
lt; 2.14.0
-------------------------------------------------------------------
2 affected packages on all of their supported architectures.
-------------------------------------------------------------------

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

Tavis Ormandy of the Google Security team reported a heap-based buffer
overflow when compiling regular expression patterns containing
"Internal Option Settings" such as " ?i)".

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 "gt;=dev-libs/libpcre-7.7-r1"

All GLib users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=dev-libs/glib-2.16.3-r1"

References
==========

[ 1 ] CVE-2008-2371
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2371

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

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

http://security.gentoo.org/glsa/glsa-200807-03.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