{"id":"CVE-2011-2943","details":"The irc_msg_who function in msgs.c in the IRC protocol plugin in libpurple 2.8.0 through 2.9.0 in Pidgin before 2.10.0 does not properly validate characters in nicknames, which allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted nickname that is not properly handled in a WHO response.","modified":"2026-04-10T03:41:55.270406Z","published":"2011-08-29T17:55:00Z","references":[{"type":"ADVISORY","url":"http://pidgin.im/news/security/?id=53"},{"type":"ADVISORY","url":"http://secunia.com/advisories/45663"},{"type":"ADVISORY","url":"http://secunia.com/advisories/45916"},{"type":"FIX","url":"http://developer.pidgin.im/viewmtn/revision/diff/5749f9193063800d27bef75c2388f6f9cc2f7f37/with/5c2dba4a7e2e76b76e7f472b88953a4316706d43/libpurple/protocols/irc/msgs.c"},{"type":"FIX","url":"http://developer.pidgin.im/viewmtn/revision/info/5c2dba4a7e2e76b76e7f472b88953a4316706d43"},{"type":"FIX","url":"http://pidgin.im/news/security/?id=53"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=722939"},{"type":"WEB","url":"http://securitytracker.com/id?1025961"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2011/08/20/2"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2011/08/22/2"},{"type":"WEB","url":"http://www.securityfocus.com/bid/49268"},{"type":"WEB","url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/69340"},{"type":"WEB","url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18005"}],"schema_version":"1.7.5"}