Ubuntu Security Notice USN-1800-1
15th April, 2013
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
HAProxy could be made to crash or run programs if it received specially crafted network traffic.
- haproxy - fast and reliable load balancing reverse proxy
It was discovered that HAProxy incorrectly handled configurations where
global.tune.bufsize was set to a value higher than the default. A remote
attacker could use this issue to cause a denial of service, or possibly
execute arbitrary code. (CVE-2012-2942)
Yves Lafon discovered that HAProxy incorrectly handled HTTP keywords in TCP
inspection rules when HTTP keep-alive is enabled. A remote attacker could
use this issue to cause a denial of service, or possibly execute arbitrary
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.10:
- haproxy 1.4.18-0ubuntu2.1
- Ubuntu 12.04 LTS:
- haproxy 1.4.18-0ubuntu1.1
- Ubuntu 11.10:
- haproxy 1.4.15-1ubuntu0.1
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.