USN-1234-1: acpid vulnerability

20 October 2011

acpid vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


acpid could be made to stall under certain conditions.

Software Description

  • acpid - Advanced Configuration and Power Interface event daemon


Vasiliy Kulikov discovered that acpid did not properly handle connections from poorly behaving clients. A local attacker could potentially exploit this to cause a denial of service.

Update instructions

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

Ubuntu 11.04
acpid - 1:2.0.7-1ubuntu2.1
Ubuntu 10.10
acpid - 1.0.10-5ubuntu4.1
Ubuntu 10.04 LTS
acpid - 1.0.10-5ubuntu2.2

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.