A NULL pointer dereference flaw was found in the way LibVNCServer before 0.9.9 handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client.
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/139654.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/139814.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140219.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-September/139445.html