gaim -- remote DoS on receiving certain messages over IRC

The GAIM team reports:

The IRC protocol plugin in Gaim 1.2.0, and possibly
earlier versions, allows (1) remote attackers to inject
arbitrary Gaim markup via irc_msg_kick, irc_msg_mode,
irc_msg_part, irc_msg_quit, (2) remote attackers to inject
arbitrary Pango markup and pop up empty dialog boxes via
irc_msg_invite, or (3) malicious IRC servers to cause a
denial of service (application crash) by injecting certain
Pango markup into irc_msg_badmode, irc_msg_banned,
irc_msg_unknown, irc_msg_nochan functions.