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Gentoo Linux Security Advisory 200907-3

Gentoo Linux Security Advisory 200907-3
Posted Jul 6, 2009
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200907-03 - Multiple vulnerabilities in the Apache Portable Runtime Utility Library might enable remote attackers to cause a Denial of Service or disclose sensitive information. Versions less than 1.3.7 are affected.

tags | advisory, remote, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2009-0023, CVE-2009-1955, CVE-2009-1956
SHA-256 | 4263d47d1b70e312d108199ea0389b75e3ded16f3aec80a2d0b1d0b8cf07bff9

Gentoo Linux Security Advisory 200907-3

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Gentoo Linux Security Advisory GLSA 200907-03
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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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