[ GLSA 200907-03 ] APR Utility Library: Multiple vulnerabilities

[Alex Legler <a3li () gentoo org>]

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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

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