Debian Long Term Support / LTS Security Information / 2017 / Security Information -- DLA-831-1 gtk-vnc

Debian Security Advisory

DLA-831-1 gtk-vnc -- LTS security update

Date Reported:

20 Feb 2017

Affected Packages:

gtk-vnc

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 854450.
In Mitre's CVE dictionary: CVE-2017-5884, CVE-2017-5885.

More information:

Josef Gajdusek discovered two vulnerabilities in gtk-vnc, a VNC viewer widget for GTK:

• CVE-2017-5884

  Fix bounds checking for RRE, hextile & copyrec encodings. This bug allowed a remote server to cause a denial of service by buffer overflow via a carefully crafted message containing subrectangles outside the drawing area.

• CVE-2017-5885

  Correctly validate color map range indexes. This bug allowed a remote server to cause a denial of service by buffer overflow via a carefully crafted message with out-of-range colour values.

For Debian 7 Wheezy, these problems have been fixed in version 0.5.0-3.1+deb7u1.

We recommend that you upgrade your gtk-vnc packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS