{"id":"DEBIAN-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":"2025-11-19T02:02:51.133274Z","published":"2011-08-29T17:55:00.957Z","upstream":["CVE-2011-2943"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2011-2943"}],"affected":[{"package":{"name":"pidgin","ecosystem":"Debian:11","purl":"pkg:deb/debian/pidgin?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.0-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-2943.json"}},{"package":{"name":"pidgin","ecosystem":"Debian:12","purl":"pkg:deb/debian/pidgin?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.0-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-2943.json"}},{"package":{"name":"pidgin","ecosystem":"Debian:13","purl":"pkg:deb/debian/pidgin?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.0-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-2943.json"}},{"package":{"name":"pidgin","ecosystem":"Debian:14","purl":"pkg:deb/debian/pidgin?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.0-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-2943.json"}}],"schema_version":"1.7.3"}