Debian Linux Security Advisory 2417-1 - It was discovered that the internal hashing routine of libxml2, a library providing an extensive API to handle XML data, is vulnerable to predictable hash collisions. Given an attacker with knowledge of the hashing algorithm, it is possible to craft input that creates a large amount of collisions. As a result it is possible to perform denial of service attacks against applications using libxml2 functionality because of the computational overhead.
cf6eb06a9662d3cbb04a61d240b222ea745c263a73494063aa45b2362bc1dd87