Ubuntu Security Notice 1676-1 - Dan Rosenberg discovered that the example AppArmor profile for chromium-browser could be escaped by calling xdg-settings with a crafted environment.
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Ubuntu Security Notice USN-1676-1
December 19, 2012
AppArmor update
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
Summary:
A weakness was discovered in the example AppArmor profile for
chromium-browser.
Software Description:
- apparmor: Linux security system
Details:
Dan Rosenberg discovered that the example AppArmor profile for
chromium-browser could be escaped by calling xdg-settings with a crafted
environment.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
apparmor-profiles 2.7.102-0ubuntu3.7
Ubuntu 11.10:
apparmor-profiles 2.7.0~beta1+bzr1774-1ubuntu2.2
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1676-1
https://launchpad.net/bugs/1045986
Package Information:
https://launchpad.net/ubuntu/+source/apparmor/2.7.102-0ubuntu3.7
https://launchpad.net/ubuntu/+source/apparmor/2.7.0~beta1+bzr1774-1ubuntu2.2