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Gentoo Linux Security Advisory                           GLSA 200907-03
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: APR Utility Library: Multiple vulnerabilities
      Date: July 04, 2009
      Bugs: #268643, #272260, #274193
        ID: 200907-03

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Synopsis
========

Multiple vulnerabilities in the Apache Portable Runtime Utility Library
might enable remote attackers to cause a Denial of Service or disclose
sensitive information.

Background
==========

The Apache Portable Runtime Utility Library (aka apr-util) provides an
interface to functionality such as XML parsing, string matching and
databases connections.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  dev-libs/apr-util       < 1.3.7                          >= 1.3.7

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

Multiple vulnerabilities have been discovered in the APR Utility
Library:

* Matthew Palmer reported a heap-based buffer underflow while
  compiling search patterns in the apr_strmatch_precompile() function
  in strmatch/apr_strmatch.c (CVE-2009-0023).

* kcope reported that the expat XML parser in xml/apr_xml.c does not
  limit the amount of XML entities expanded recursively
  (CVE-2009-1955).

* C. Michael Pilato reported an off-by-one error in the
  apr_brigade_vprintf() function in buckets/apr_brigade.c
  (CVE-2009-1956).

Impact
======

A remote attacker could exploit these vulnerabilities to cause a Denial
of Service (crash or memory exhaustion) via an Apache HTTP server
running mod_dav or mod_dav_svn, or using several configuration files.
Additionally, a remote attacker could disclose sensitive information or
cause a Denial of Service by sending a specially crafted input. NOTE:
Only big-endian architectures such as PPC and HPPA are affected by the
latter flaw.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Apache Portable Runtime Utility Library users should upgrade to the
latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/apr-util-1.3.7"

References
==========

  [ 1 ] CVE-2009-0023
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0023
  [ 2 ] CVE-2009-1955
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1955
  [ 3 ] CVE-2009-1956
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1956

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

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

  http://security.gentoo.org/glsa/glsa-200907-03.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 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