[USN-1284-2] Update Manager regression

Marc Deslauriers marc.deslauriers at canonical.com
Thu Feb 16 19:07:00 UTC 2012

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


USN-1284-1 introduced a regression in Update Manager.

Software Description:
- update-manager: GNOME application that manages apt updates


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.
 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:

Ubuntu 11.04:
  update-manager-core             1:

Ubuntu 10.10:
  update-manager-core             1:

Ubuntu 10.04 LTS:
  update-manager-core             1:

Ubuntu 8.04 LTS:
  update-manager-core             1:0.87.33

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


Package Information:

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