USN-3116-1: DBus vulnerabilities

Releases

• Ubuntu 16.10
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• dbus - simple interprocess messaging system

Details

It was discovered that DBus incorrectly validated the source of
ActivationFailure signals. A local attacker could use this issue to cause a
denial of service. This issue only applied to Ubuntu 12.04 LTS and Ubuntu
14.04 LTS. (CVE-2015-0245)

It was discovered that DBus incorrectly handled certain format strings. A
local attacker could use this issue to cause a denial of service, or
possibly execute arbitrary code. This issue is only exposed to unprivileged
users when the fix for CVE-2015-0245 is not applied, hence this issue is
only likely to affect Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. Ubuntu 16.04
LTS and Ubuntu 16.10 have been updated as a preventative measure in the
event that a new attack vector for this issue is discovered.
(No CVE number)

Update instructions

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

Ubuntu 16.10

• dbus - 1.10.10-1ubuntu1.1
• libdbus-1-3 - 1.10.10-1ubuntu1.1

Ubuntu 16.04

• dbus - 1.10.6-1ubuntu3.1
• libdbus-1-3 - 1.10.6-1ubuntu3.1

Ubuntu 14.04

• dbus - 1.6.18-0ubuntu4.4
• libdbus-1-3 - 1.6.18-0ubuntu4.4

Ubuntu 12.04

• dbus - 1.4.18-1ubuntu1.8
• libdbus-1-3 - 1.4.18-1ubuntu1.8

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

References

• CVE-2015-0245