Ubuntu Security Notice USN-800-1
13th July, 2009
irssi vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 9.04
- Ubuntu 8.10
- Ubuntu 8.04 LTS
- Ubuntu 6.06 LTS
Software description
- irssi
Details
It was discovered that irssi did not properly check the length of strings
when processing WALLOPS messages. If a user connected to an IRC network
where an attacker had IRC operator privileges, a remote attacker could
cause a denial of service.
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 9.04:
- irssi 0.8.12-6ubuntu1.1
- Ubuntu 8.10:
- irssi 0.8.12-4ubuntu2.1
- Ubuntu 8.04 LTS:
- irssi 0.8.12-3ubuntu3.1
- Ubuntu 6.06 LTS:
- irssi 0.8.10-1ubuntu1.1
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to restart irssi to effect the
necessary changes.