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Ubuntu Security Notice USN-1953-1

Ubuntu Security Notice USN-1953-1
Posted Sep 18, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1953-1 - It was discovered that polkit didn't allow applications to use the pkcheck tool in a way which prevented a race condition in the UID lookup. A local attacker could use this flaw to possibly escalate privileges.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2013-4288
SHA-256 | 528785d61b42c1f01b4bfaa52b123f7ee07cc62e133897d8fdc089aa6ad23405

Ubuntu Security Notice USN-1953-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-1953-1
September 18, 2013

policykit-1 vulnerability
============================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 13.04
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

polkit could be tricked into giving out improper authorization.

Software Description:
- policykit-1: framework for managing administrative policies and privileges

Details:

It was discovered that polkit didn't allow applications to use the pkcheck
tool in a way which prevented a race condition in the UID lookup. A local
attacker could use this flaw to possibly escalate privileges.

Update instructions:

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

Ubuntu 13.04:
policykit-1 0.105-1ubuntu1.1

Ubuntu 12.10:
policykit-1 0.104-2ubuntu1.1

Ubuntu 12.04 LTS:
policykit-1 0.104-1ubuntu1.1

Ubuntu 10.04 LTS:
policykit-1 0.96-2ubuntu0.2

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

References:
http://www.ubuntu.com/usn/usn-1953-1
CVE-2013-4288

Package Information:
https://launchpad.net/ubuntu/+source/policykit-1/0.105-1ubuntu1.1
https://launchpad.net/ubuntu/+source/policykit-1/0.104-2ubuntu1.1
https://launchpad.net/ubuntu/+source/policykit-1/0.104-1ubuntu1.1
https://launchpad.net/ubuntu/+source/policykit-1/0.96-2ubuntu0.2
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