USN-3618-1: LibVNCServer vulnerability
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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart LibVNCServer
applications to make all the necessary changes.
References
Source: USN-3618-1: LibVNCServer vulnerability
