Ubuntu Security Notice 2012-1 - Christian Prim discovered that Light Display Manager incorrectly applied the AppArmor security profile when the Guest account is used. A local attacker could use this issue to possibly gain access to sensitive information.
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Ubuntu Security Notice USN-2012-1
November 06, 2013
lightdm vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 13.10
Summary:
Light Display Manager could be made to expose sensitive information
locally.
Software Description:
- lightdm: Display Manager
Details:
Christian Prim discovered that Light Display Manager incorrectly applied
the AppArmor security profile when the Guest account is used. A local
attacker could use this issue to possibly gain access to sensitive
information.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 13.10:
lightdm 1.8.4-0ubuntu1
This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to reboot your computer to
make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-2012-1
CVE-2013-4459
Package Information:
https://launchpad.net/ubuntu/+source/lightdm/1.8.4-0ubuntu1