lib/engine/components/opal/opal-call.cpp in ekiga before 4.0.0 allows remote attackers to cause a denial of service (crash) via an OPAL connection with a party name that contains invalid UTF-8 strings.
https://lists.fedoraproject.org/pipermail/package-announce/2013-March/099554.html
https://git.gnome.org/browse/ekiga/commit/?id=7d09807257
https://exchange.xforce.ibmcloud.com/vulnerabilities/80640
https://bugzilla.redhat.com/show_bug.cgi?id=883058
https://blogs.oracle.com/sunsecurity/entry/cve_2012_5621_denial_of
http://www.securityfocus.com/bid/56790
http://seclists.org/oss-sec/2012/q4/407
http://ftp.gnome.org/pub/gnome/sources/ekiga/4.0/ekiga-4.0.0.news