Pidgin 2.4.1 allows remote attackers to cause a denial of service (crash) via a long filename that contains certain characters, as demonstrated using an MSN message that triggers the crash in the msn_slplink_process_msg function.
http://secunia.com/advisories/30881
http://secunia.com/advisories/32859
http://secunia.com/advisories/33102
http://securityreason.com/securityalert/3966
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10131
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18050
http://support.avaya.com/elmodocs2/security/ASA-2008-493.htm
http://www.mandriva.com/security/advisories?name=MDVSA-2009:025
http://www.redhat.com/support/errata/RHSA-2008-1023.html