Several security issues were fixed in DBus.
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. (CVE-2014-3477)
8 July 2014
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in DBus.
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. (CVE-2014-3477)
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, CVE-2014-3533)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make all the necessary changes.
Vulmon