msg.c in the MSN protocol plugin in libpurple in Pidgin before 2.10.4 does not properly handle crafted characters, which allows remote servers to cause a denial of service (application crash) by placing these characters in a text/plain message.
hg.pidgin.im/pidgin/main/rev/4d6bcb4f4ea4
pidgin.im/news/security/?id=63
rhn.redhat.com/errata/RHSA-2012-1102.html
secunia.com/advisories/50005
www.mandriva.com/security/advisories?name=MDVSA-2012:082
www.securityfocus.com/bid/53400
hermes.opensuse.org/messages/15136503
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17448