1. Ubuntu Security Notices
  2. USN-3116-1

USN-3116-1: DBus vulnerabilities

Publication date

1 November 2016

Overview

Several security issues were fixed in DBus.

Releases

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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
16.10 yakkety dbus –  1.10.10-1ubuntu1.1
libdbus-1-3 –  1.10.10-1ubuntu1.1
16.04 xenial dbus –  1.10.6-1ubuntu3.1
libdbus-1-3 –  1.10.6-1ubuntu3.1
14.04 trusty dbus –  1.6.18-0ubuntu4.4
libdbus-1-3 –  1.6.18-0ubuntu4.4
12.04 precise dbus –  1.4.18-1ubuntu1.8
libdbus-1-3 –  1.4.18-1ubuntu1.8

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References

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