Debian Security Advisory

DSA-2652-1 libxml2 -- external entity expansion

Date Reported:
24 Mar 2013
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 702260.
In Mitre's CVE dictionary: CVE-2013-0338, CVE-2013-0339.
More information:

Brad Hill of iSEC Partners discovered that many XML implementations are vulnerable to external entity expansion issues, which can be used for various purposes such as firewall circumvention, disguising an IP address, and denial-of-service. libxml2 was susceptible to these problems when performing string substitution during entity expansion.

For the stable distribution (squeeze), these problems have been fixed in version 2.7.8.dfsg-2+squeeze7.

For the testing (wheezy) and unstable (sid) distributions, these problems have been fixed in version 2.8.0+dfsg1-7+nmu1.

We recommend that you upgrade your libxml2 packages.