Gentoo Logo

APR Utility Library: Multiple vulnerabilities


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200907-03 / apr-util
Release Date July 04, 2009
Latest Revision July 04, 2009: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
dev-libs/apr-util < 1.3.7 >= 1.3.7 All supported architectures

Related bugreports: #268643, #272260, #274193


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

2.  Impact Information


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


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).


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.

3.  Resolution Information


There is no known workaround at this time.


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

Code Listing 3.1: Resolution

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

4.  References


Page updated July 04, 2009

Summary: This is a Gentoo Linux Security Advisory

Security Team
Contact Address

Donate to support our development efforts.

Copyright 2001-2015 Gentoo Foundation, Inc. Questions, Comments? Contact us.