A denial of service flaw was found in the way Ekiga, a Gnome based SIP/H323 teleconferencing application, processed information from certain OPAL connections (UTF-8 strings were not verified for validity prior showing them). A remote attacker (other party with a not UTF-8 valid name) could use this flaw to cause ekiga executable crash.

Upstream bug report: [1] https://bugzilla.gnome.org/showbug.cgi?id=653009

Relevant upstream patch: [2] http://git.gnome.org/browse/ekiga/commit/?id=7d09807257

References: [3] http://ftp.gnome.org/pub/gnome/sources/ekiga/4.0/ekiga-4.0.0.news