1. Ubuntu Security Notices
  2. USN-1296-1

USN-1296-1: acpid vulnerabilities

Publication date

8 December 2011

Overview

Several security issues were fixed in acpid.

Releases

Packages

  • acpid - Advanced Configuration and Power Interface daemon

Details

Oliver-Tobias Ripka discovered that an ACPI script incorrectly handled power
button events. A local attacker could use this to execute arbitrary code, and
possibly escalate privileges. (CVE-2011-2777)

Helmut Grohne and Michael Biebl discovered that ACPI scripts were executed with
a permissive file mode creation mask (umask). A local attacker could read files
and modify directories created by ACPI scripts that did not set a strict umask.
(CVE-2011-4578)

Oliver-Tobias Ripka discovered that an ACPI script incorrectly handled power
button events. A local attacker could use this to execute arbitrary code, and
possibly escalate privileges. (CVE-2011-2777)

Helmut Grohne and Michael Biebl discovered that ACPI scripts were executed with
a permissive file mode creation mask (umask). A local attacker could read files
and modify directories created by ACPI scripts that did not set a strict umask.
(CVE-2011-4578)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
11.10 oneiric acpid –  1:2.0.10-1ubuntu2.3
11.04 natty acpid –  1:2.0.7-1ubuntu2.4
10.10 maverick acpid –  1.0.10-5ubuntu4.4
10.04 lucid acpid –  1.0.10-5ubuntu2.5

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References

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