ubuntu-security-announce Digest, Vol 90, Issue 3

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Today's Topics:

1. [USN-1382-1] Light Display Manager vulnerability
(Marc Deslauriers)

----------------------------------------------------------------------

Message: 1
Date: Mon, 05 Mar 2012 09:13:53 -0500
From: Marc Deslauriers <marc.deslauriers@canonical.com>
To: ubuntu-security-announce@lists.ubuntu.com
Subject: [USN-1382-1] Light Display Manager vulnerability
Message-ID: <1330956833.15222.8.camel@mdlinux>
Content-Type: text/plain; charset="utf-8"

==========================================================================
Ubuntu Security Notice USN-1382-1
March 05, 2012

lightdm vulnerability
==========================================================================

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

- Ubuntu 11.10

Summary:

Light Display Manager would allow unintended access to file descriptors.

Software Description:
- lightdm: Display Manager

Details:

Austin Clements discovered that Light Display Manager incorrectly leaked
file descriptors to child processes. A local attacker can use this to
bypass intended permissions and write to the log file, cause a denial of
service, or possibly have another unknown impact.

Update instructions:

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

Ubuntu 11.10:
liblightdm-gobject-1-0 1.0.6-0ubuntu1.4
liblightdm-qt-1-0 1.0.6-0ubuntu1.4
lightdm 1.0.6-0ubuntu1.4
lightdm-gtk-greeter 1.0.6-0ubuntu1.4
lightdm-qt-greeter 1.0.6-0ubuntu1.4

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1382-1
https://launchpad.net/bugs/927060

Package Information:
https://launchpad.net/ubuntu/+source/lightdm/1.0.6-0ubuntu1.4

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