Home / mailings [USN-1296-1] acpid vulnerabilities
Posted on 09 December 2011
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==========================================================================
Ubuntu Security Notice USN-1296-1
December 08, 2011
acpid vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
Summary:
Several security issues were fixed in acpid.
Software Description:
- 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)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
acpid 1:2.0.10-1ubuntu2.3
Ubuntu 11.04:
acpid 1:2.0.7-1ubuntu2.4
Ubuntu 10.10:
acpid 1.0.10-5ubuntu4.4
Ubuntu 10.04 LTS:
acpid 1.0.10-5ubuntu2.5
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1296-1
CVE-2011-2777, CVE-2011-4578
Package Information:
https://launchpad.net/ubuntu/+source/acpid/1:2.0.10-1ubuntu2.3
https://launchpad.net/ubuntu/+source/acpid/1:2.0.7-1ubuntu2.4
https://launchpad.net/ubuntu/+source/acpid/1.0.10-5ubuntu4.4
https://launchpad.net/ubuntu/+source/acpid/1.0.10-5ubuntu2.5
