USN-3171-1: LibVNCServer vulnerabilities
Ubuntu Security Notice USN-3171-1
11th January, 2017
libvncserver vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
Several security issues were fixed in LibVNCServer.
Software description
- libvncserver
– vnc server library
Details
Josef Gajdusek discovered that the LibVNCServer client library incorrectly
handled certain FrameBufferUpdate messages. If a user were tricked into
connecting to a malicious server, an attacker could use this issue to cause
a denial of service, or possibly execute arbitrary code. (CVE-2016-9941,
CVE-2016-9942)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 16.10:
-
libvncserver1
0.9.10+dfsg-3ubuntu0.16.10.1
-
libvncclient1
0.9.10+dfsg-3ubuntu0.16.10.1
- Ubuntu 16.04 LTS:
-
libvncserver1
0.9.10+dfsg-3ubuntu0.16.04.1
-
libvncclient1
0.9.10+dfsg-3ubuntu0.16.04.1
- Ubuntu 14.04 LTS:
-
libvncserver0
0.9.9+dfsg-1ubuntu1.2
- Ubuntu 12.04 LTS:
-
libvncserver0
0.9.8.2-2ubuntu1.2
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
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