USN-2275-1: DBus vulnerabilities

Releases

• Ubuntu 14.04 ESM
• Ubuntu 13.10
• Ubuntu 12.04

Packages

• dbus - simple interprocess messaging system

Details

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)

Update instructions

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

Ubuntu 14.04

• dbus - 1.6.18-0ubuntu4.1
• libdbus-1-3 - 1.6.18-0ubuntu4.1

Ubuntu 13.10

• dbus - 1.6.12-0ubuntu10.1
• libdbus-1-3 - 1.6.12-0ubuntu10.1

Ubuntu 12.04

• dbus - 1.4.18-1ubuntu1.5
• libdbus-1-3 - 1.4.18-1ubuntu1.5

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

References

• CVE-2014-3477
• CVE-2014-3532
• CVE-2014-3533