=========================================================================Ubuntu Security Notice USN-1284-2
February 16, 2012
update-manager regression
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Summary:
USN-1284-1 introduced a regression in Update Manager.
Software Description:
- update-manager: GNOME application that manages apt updates
Details:
USN-1284-1 fixed vulnerabilities in Update Manager. One of the fixes
introduced a regression for Kubuntu users attempting to upgrade to a newer
Ubuntu release. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
David Black discovered that Update Manager incorrectly extracted the
downloaded upgrade tarball before verifying its GPG signature. If a remote
attacker were able to perform a man-in-the-middle attack, this flaw could
potentially be used to replace arbitrary files. (CVE-2011-3152)
David Black discovered that Update Manager created a temporary directory
in an insecure fashion. A local attacker could possibly use this flaw to
read the XAUTHORITY file of the user performing the upgrade.
(CVE-2011-3154)
This update also adds a hotfix to Update Notifier to handle cases where the
upgrade is being performed from CD media.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
update-manager-core 1:0.152.25.8
Ubuntu 11.04:
update-manager-core 1:0.150.5.2
Ubuntu 10.10:
update-manager-core 1:0.142.23.2
Ubuntu 10.04 LTS:
update-manager-core 1:0.134.11.2
Ubuntu 8.04 LTS:
update-manager-core 1:0.87.33
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-1284-2
https://ubuntu.com/security/notices/USN-1284-1
https://launchpad.net/bugs/933225
Package Information:
https://launchpad.net/ubuntu/+source/update-manager/1:0.152.25.8
https://launchpad.net/ubuntu/+source/update-manager/1:0.150.5.2
https://launchpad.net/ubuntu/+source/update-manager/1:0.142.23.2
https://launchpad.net/ubuntu/+source/update-manager/1:0.134.11.2
https://launchpad.net/ubuntu/+source/update-manager/1:0.87.33