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Ubuntu Security Notice USN-2579-1
April 27, 2015

autofs vulnerability

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

• Ubuntu 14.10

Summary:

autofs could be made to run programs as an administrator if program maps
were configured.

Software Description:

• autofs: kernel-based automounter for Linux

Details:

It was discovered that autofs incorrectly filtered environment variables
when using program maps. When program maps were configured, a local user
could use this issue to escalate privileges.

This update changes the default behaviour by adding a prefix to environment
variables. Sites using program maps will need to adapt to the new variable
names, or revert to the previous names by using a new configuration option
called FORCE_STANDARD_PROGRAM_MAP_ENV.

Update instructions:

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

Ubuntu 14.10:
autofs 5.0.8-1ubuntu1.1

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

References:
http://www.ubuntu.com/usn/usn-2579-1
CVE-2014-8169

Package Information:
https://launchpad.net/ubuntu/+source/autofs/5.0.8-1ubuntu1.1

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