Integer overflow in the _zip_readcdir function in zip_open.c in libzip 0.10 allows remote attackers to execute arbitrary code via the size and offset values for the central directory in a zip archive, which triggers "improper restrictions of operations within the bounds of a memory buffer" and an information leak.
http://www.openwall.com/lists/oss-security/2012/03/29/11
http://www.openwall.com/lists/oss-security/2012/03/21/2
http://www.nih.at/libzip/NEWS.html
http://www.mandriva.com/security/advisories?name=MDVSA-2012:034