Mandriva Security Advisory – A format string flaw was discovered in how ekiga processes certain messages, which could permit a remote attacker that can connect to ekiga to potentially execute arbitrary code with the privileges of the user running ekiga.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/54614/MDKSA-2007-044.txt
Source: https://packetstormsecurity.com/files/54614/Mandriva-Linux-Security-Advisory-2007.044.html