=========================================================================== Ubuntu Security Notice USN-3203-1 February 20, 2017 gtk-vnc vulnerabilities =========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS - Ubuntu 12.04 LTS Summary: gtk-vnc could be made to crash or run programs if it received specially crafted network traffic. Software Description: - gtk-vnc: VNC viewer widget Details: It was discovered that gtk-vnc incorrectly validated certain data. A malicious server could use this issue to cause gtk-vnc to crash, resulting in a denial of service, or possibly execute arbitrary code. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: libgtk-vnc-1.0-0 0.5.3-0ubuntu2.1 libgtk-vnc-2.0-0 0.5.3-0ubuntu2.1 libgvnc-1.0-0 0.5.3-0ubuntu2.1 Ubuntu 12.04 LTS: libgtk-vnc-1.0-0 0.5.0-1ubuntu1.1 libgtk-vnc-2.0-0 0.5.0-1ubuntu1.1 libgvnc-1.0-0 0.5.0-1ubuntu1.1 In general, a standard system update will make all the necessary changes. References: http://www.ubuntu.com/usn/usn-3203-1 CVE-2017-5884, CVE-2017-5885 Package Information: https://launchpad.net/ubuntu/+source/gtk-vnc/0.5.3-0ubuntu2.1 https://launchpad.net/ubuntu/+source/gtk-vnc/0.5.0-1ubuntu1.1