The msn_oim_report_to_user function in oim.c in the MSN protocol plugin in libpurple in Pidgin before 2.10.2 allows remote servers to cause a denial of service (application crash) via an OIM message that lacks UTF-8 encoding.
developer.pidgin.im/ticket/14884
developer.pidgin.im/viewmtn/revision/diff/60f8379d0a610538cf42e0dd9ab1436c8b9308cd/with/3053d6a37cc6d8774aba7607b992a4408216adcd/libpurple/protocols/msn/oim.c
developer.pidgin.im/viewmtn/revision/info/3053d6a37cc6d8774aba7607b992a4408216adcd
pidgin.im/news/security/?id=61
rhn.redhat.com/errata/RHSA-2012-1102.html
secunia.com/advisories/50005
www.mandriva.com/security/advisories?name=MDVSA-2012:029
www.securityfocus.com/bid/52475
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18019