==========================================================================
Ubuntu Security Notice USN-3618-1
April 04, 2018

libvncserver vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 17.10
– Ubuntu 16.04 LTS
– Ubuntu 14.04 LTS

Summary:

LibVNCServer could be made to crash, expose sensitive information, or run
programs if it received specially crafted network traffic.

Software Description:
– libvncserver: vnc server library

Details:

It was discovered that LibVNCServer incorrectly handled certain packet
lengths. A remote attacker able to connect to a LibVNCServer could possibly
use this issue to obtain sensitive information, cause a denial of service,
or execute arbitrary code.

Update instructions:

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

Ubuntu 17.10:
libvncclient1 0.9.11+dfsg-1ubuntu0.1
libvncserver1 0.9.11+dfsg-1ubuntu0.1

Ubuntu 16.04 LTS:
libvncserver1 0.9.10+dfsg-3ubuntu0.16.04.2

Ubuntu 14.04 LTS:
libvncserver0 0.9.9+dfsg-1ubuntu1.3

After a standard system update you need to restart LibVNCServer
applications to make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3618-1
CVE-2018-7225

Package Information:
https://launchpad.net/ubuntu/+source/libvncserver/0.9.11+dfsg-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libvncserver/0.9.10+dfsg-3ubuntu0.16.04.2
https://launchpad.net/ubuntu/+source/libvncserver/0.9.9+dfsg-1ubuntu1.3

—–BEGIN PGP SIGNATURE—–
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=+pao
—–END PGP SIGNATURE—–
—