1. Ubuntu Security Notices
  2. USN-3171-1

USN-3171-1: LibVNCServer vulnerabilities

Publication date

11 January 2017

Overview

Several security issues were fixed in LibVNCServer.

Releases

Packages

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)

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

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
16.10 yakkety libvncclient1 –  0.9.10+dfsg-3ubuntu0.16.10.1
libvncserver1 –  0.9.10+dfsg-3ubuntu0.16.10.1
16.04 xenial libvncclient1 –  0.9.10+dfsg-3ubuntu0.16.04.1
libvncserver1 –  0.9.10+dfsg-3ubuntu0.16.04.1
14.04 trusty libvncserver0 –  0.9.9+dfsg-1ubuntu1.2
12.04 precise libvncserver0 –  0.9.8.2-2ubuntu1.2

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References

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