Gentoo: libpcre Heap integer overflow
Posted by Benjamin D. Thomas   
Gentoo libpcre is vulnerable to a heap integer overflow, possibly leading to the execution of arbitrary code.
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Gentoo Linux Security Advisory                           GLSA 200508-17
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                                            http://security.gentoo.org/
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  Severity: High
     Title: libpcre: Heap integer overflow
      Date: August 25, 2005
      Bugs: #103337
        ID: 200508-17

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Synopsis
========

libpcre is vulnerable to a heap integer overflow, possibly leading to
the execution of arbitrary code.

Background
==========

libpcre is a library providing functions for Perl-compatible regular
expressions.

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

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  dev-libs/libpcre        < 6.3                              >= 6.3

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

libpcre fails to check certain quantifier values in regular expressions
for sane values.

Impact
======

An attacker could possibly exploit this vulnerability to execute
arbitrary code by sending specially crafted regular expressions to
applications making use of the libpcre library.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libpcre users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/libpcre-6.3"

References
==========

  [ 1 ] CAN-2005-2491
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2491
  [ 2 ] SecurityTracker Alert ID 1014744
        http://www.securitytracker.com/alerts/2005/Aug/1014744.html

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

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

  http://security.gentoo.org/glsa/glsa-200508-17.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 2005 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/2.0