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Ubuntu Security Notice USN-2362-1
September 24, 2014

bash vulnerability

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

• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS
• Ubuntu 10.04 LTS

Summary:

Bash allowed bypassing environment restrictions in certain environments.

Software Description:

• bash: GNU Bourne Again SHell

Details:

Stephane Chazelas discovered that Bash incorrectly handled trailing code in
function definitions. An attacker could use this issue to bypass
environment restrictions, such as SSH forced command environments.

Update instructions:

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

Ubuntu 14.04 LTS:
bash 4.3-7ubuntu1.1

Ubuntu 12.04 LTS:
bash 4.2-2ubuntu2.2

Ubuntu 10.04 LTS:
bash 4.1-2ubuntu3.1

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

References:
http://www.ubuntu.com/usn/usn-2362-1
CVE-2014-6271

Package Information:
https://launchpad.net/ubuntu/+source/bash/4.3-7ubuntu1.1
https://launchpad.net/ubuntu/+source/bash/4.2-2ubuntu2.2
https://launchpad.net/ubuntu/+source/bash/4.1-2ubuntu3.1

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