Fedora 15 : expat-2.1.0-1.fc15 (2012-6996)
Medium Nessus Plugin ID 59101
SynopsisThe remote Fedora host is missing a security update.
DescriptionThis update includes expat 2.1.0, which fixes includes a fix for a security issue.
A specially crafted set of keys could trigger hash function collisions, which degrade dictionary performance by changing hash table operations complexity from an expected/average O(1) to the worst case O(n). Reporters were able to find colliding strings efficiently using meet in the middle attack. (CVE-2012-0876)
Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected expat package.