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USN-2275-1: DBus vulnerabilities

8 July 2014

Several security issues were fixed in DBus.



  • dbus - simple interprocess messaging system


Alban Crequy discovered that dbus-daemon incorrectly sent AccessDenied
errors to the service instead of the client when enforcing permissions. A
local user can use this issue to possibly deny access to the service.

Alban Crequy discovered that dbus-daemon incorrectly handled certain file
descriptors. A local attacker could use this issue to cause services or
clients to disconnect, resulting in a denial of service. (CVE-2014-3532,

Update instructions

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

Ubuntu 14.04
Ubuntu 13.10
Ubuntu 12.04

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