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Debian Security Advisory DSA-2659-1                   security@debian.org
http://www.debian.org/security/                      Salvatore Bonaccorso
April 09, 2013                         http://www.debian.org/security/faq
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Package        : libapache-mod-security
Vulnerability  : XML external entity processing vulnerability
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2013-1915
Debian Bug     : 704625

Timur Yunusov and Alexey Osipov from Positive Technologies discovered
that the XML files parser of ModSecurity, an Apache module whose purpose
is to tighten the Web application security, is vulnerable to XML
external entities attacks. A specially-crafted XML file provided by a
remote attacker, could lead to local file disclosure or excessive
resources (CPU, memory) consumption when processed.

This update introduces a SecXmlExternalEntity option which is 'Off' by
default.  This will disable the ability of libxml2 to load external
entities.

For the stable distribution (squeeze), this problem has been fixed in
version 2.5.12-1+squeeze2.

For the testing distribution (wheezy), this problem has been fixed in
version 2.6.6-6 of the modsecurity-apache package.

For the unstable distribution (sid), this problem has been fixed in
version 2.6.6-6 of the modsecurity-package package.

We recommend that you upgrade your libapache-mod-security packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org