Red Hat Security Advisory 2017-2258-01 - The gtk-vnc packages provide a VNC viewer widget for GTK. The gtk-vnc widget is built by using co-routines, which allows the widget to be completely asynchronous while remaining single-threaded. The following packages have been upgraded to a later upstream version: gtk-vnc. Security Fix: It was found that gtk-vnc lacked proper bounds checking while processing messages using RRE, hextile, or copyrect encodings. A remote malicious VNC server could use this flaw to crash VNC viewers which are based on the gtk-vnc library.
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Ubuntu Security Notice 3203-1 - 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.
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