USN-3116-1: DBus vulnerabilities

Ubuntu Security Notice USN-3116-1

1st November, 2016

dbus vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

Ubuntu 16.10
Ubuntu 16.04 LTS
Ubuntu 14.04 LTS
Ubuntu 12.04 LTS

Summary

Several security issues were fixed in DBus.

Software description

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 version:

Ubuntu 16.10:: dbus

1.10.10-1ubuntu1.1; libdbus-1-3

1.10.10-1ubuntu1.1
Ubuntu 16.04 LTS:: dbus

1.10.6-1ubuntu3.1; libdbus-1-3

1.10.6-1ubuntu3.1
Ubuntu 14.04 LTS:: dbus

1.6.18-0ubuntu4.4; libdbus-1-3

1.6.18-0ubuntu4.4
Ubuntu 12.04 LTS:: dbus

1.4.18-1ubuntu1.8; libdbus-1-3

1.4.18-1ubuntu1.8

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.

References

CVE-2015-0245

Source: USN-3116-1: DBus vulnerabilities

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