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Ubuntu Security Notice USN-1576-1

Ubuntu Security Notice USN-1576-1
Posted Sep 20, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1576-1 - Sebastian Krahmer discovered that DBus incorrectly handled environment variables when running with elevated privileges. A local attacker could possibly exploit this flaw with a setuid binary and gain root privileges.

tags | advisory, local, root
systems | linux, ubuntu
advisories | CVE-2012-3524
MD5 | cb86b09af16c3fba0f63cfb9e4776837

Ubuntu Security Notice USN-1576-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-1576-1
September 20, 2012

dbus vulnerability
============================================================================

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

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

DBus could be made to run programs as an administrator.

Software Description:
- dbus: simple interprocess messaging system

Details:

Sebastian Krahmer discovered that DBus incorrectly handled environment
variables when running with elevated privileges. A local attacker could
possibly exploit this flaw with a setuid binary and gain root privileges.

Update instructions:

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

Ubuntu 12.04 LTS:
dbus 1.4.18-1ubuntu1.1
libdbus-1-3 1.4.18-1ubuntu1.1

Ubuntu 11.10:
dbus 1.4.14-1ubuntu1.1
libdbus-1-3 1.4.14-1ubuntu1.1

Ubuntu 11.04:
dbus 1.4.6-1ubuntu6.2
libdbus-1-3 1.4.6-1ubuntu6.2

Ubuntu 10.04 LTS:
dbus 1.2.16-2ubuntu4.5
libdbus-1-3 1.2.16-2ubuntu4.5

Ubuntu 8.04 LTS:
dbus 1.1.20-1ubuntu3.7
libdbus-1-3 1.1.20-1ubuntu3.7

In general, a standard system update will make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1576-1
CVE-2012-3524

Package Information:
https://launchpad.net/ubuntu/+source/dbus/1.4.18-1ubuntu1.1
https://launchpad.net/ubuntu/+source/dbus/1.4.14-1ubuntu1.1
https://launchpad.net/ubuntu/+source/dbus/1.4.6-1ubuntu6.2
https://launchpad.net/ubuntu/+source/dbus/1.2.16-2ubuntu4.5
https://launchpad.net/ubuntu/+source/dbus/1.1.20-1ubuntu3.7

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