A security vulnerability has been identified and fixed in pidgin: It has been discovered that eight denial of service conditions exist in libpurple all due to insufficient validation of the return value from purple_base64_decode. Invalid or malformed data received in place of a valid base64-encoded value in portions of the Yahoo!, MSN, MySpaceIM, and XMPP protocol plugins and the NTLM authentication support trigger a crash. These vulnerabilities can be leveraged by a remote user for denial of service . Packages for 2009.0 are provided as of the Extended Maintenance Program