Ubuntu Security Notice USN-1707-1
28th January, 2013
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS
libssh could be made to crash if it received specially crafted network traffic.
- libssh - A tiny C SSH library
Yong Chuan Koh discovered that libssh incorrectly handled certain
negotiation requests. A remote attacker could use this to cause libssh to
crash, resulting in a denial of service.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.10:
- libssh-4 0.5.2-1ubuntu0.12.10.2
- Ubuntu 12.04 LTS:
- libssh-4 0.5.2-1ubuntu0.12.04.2
- Ubuntu 11.10:
- libssh-4 0.5.2-1ubuntu0.11.10.2
- Ubuntu 10.04 LTS:
- libssh-4 0.4.2-1ubuntu1.2
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.