USN-766-1: acpid vulnerability

27 April 2009

acpid 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

  • acpid


It was discovered that acpid did not properly handle a large number of connections. A local user could exploit this and monopolize CPU resources, leading to a denial of service.

Update instructions

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

Ubuntu 9.04
acpid - 1.0.6-9ubuntu4.9.04.2
Ubuntu 8.10
acpid - 1.0.6-9ubuntu4.8.10.2
Ubuntu 8.04 LTS
acpid - 1.0.4-5ubuntu9.3
Ubuntu 6.06 LTS
acpid - 1.0.4-1ubuntu11.2

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.