1. Ubuntu Security Notices
  2. USN-1284-1

USN-1284-1: Update Manager vulnerabilities

Publication date

28 November 2011

Overview

Update Manager could be made to overwrite files as the administrator.

Releases

Packages

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 machine-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.

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 machine-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

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
8.04 hardy update-manager –  1:0.87.31.1
11.10 oneiric update-manager –  1:0.152.25.5
11.04 natty update-manager –  1:0.150.5.1
update-notifier –  0.111ubuntu2.1
10.10 maverick update-manager –  1:0.142.23.1
update-notifier –  0.105ubuntu1.1
10.04 lucid auto-upgrade-tester –  1:0.134.11.1
update-notifier –  0.99.3ubuntu0.1

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References

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