Buffer overflow in http.c in the MXit protocol plugin in libpurple in Pidgin before 2.10.7 allows remote servers to execute arbitrary code via a long HTTP header.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17474
http://www.ubuntu.com/usn/USN-1746-1
http://www.securityfocus.com/bid/57951
http://www.pidgin.im/news/security/?id=66
http://lists.opensuse.org/opensuse-security-announce/2013-03/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2013-03/msg00006.html
http://lists.opensuse.org/opensuse-security-announce/2013-03/msg00003.html