Pidgin is an instant messaging program which can log in to multipleaccounts on multiple instant messaging networks simultaneously.An input sanitization flaw was found in the way Pidgin's MSN protocolimplementation handled MSNSLP invitations. A remote attacker could send aspecially-crafted INVITE request that would cause a denial of service(memory corruption and Pidgin crash). (CVE-2010-0277)A denial of service flaw was found in Finch's XMPP chat implementation,when using multi-user chat. If a Finch user in a multi-user chat sessionwere to change their nickname to contain the HTML "br" element, it wouldcause Finch to crash. (CVE-2010-0420)Red Hat would like to thank Sadrul Habib Chowdhury of the Pidgin projectfor responsibly reporting the CVE-2010-0420 issue.A denial of service flaw was found in the way Pidgin processed emoticonimages. A remote attacker could flood the victim with emoticon imagesduring mutual communication, leading to excessive CPU use. (CVE-2010-0423)These packages upgrade Pidgin to version 2.6.6. Refer to the Pidgin releasenotes for a full list of changes: http://developer.pidgin.im/wiki/ChangeLogAll Pidgin users are advised to upgrade to these updated packages, whichcorrect these issues. Pidgin must be restarted for this update to takeeffect.