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Debian Security Advisory DSA 2652-1 (libxml2 - external entity expansion)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
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.
Affected Software
Affected Software
libxml2 on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
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.