CVE-2011-2943

Name	CVE-2011-2943
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	638709

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pidgin (PTS)	bullseye	2.14.1-1	fixed
	bookworm	2.14.12-1	fixed
	forky, sid, trixie	2.14.14-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Debian Bugs
pidgin	source	lenny	(not affected)
pidgin	source	squeeze	(not affected)
pidgin	source	(unstable)	2.10.0-1	638709

[squeeze] - pidgin <not-affected> (Only affects 2.8 to 2.10)
[lenny] - pidgin <not-affected> (Only affects 2.8 to 2.10)