[USN-2380-1] Bash vulnerabilities

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-2380-1
October 09, 2014

bash vulnerabilities
==========================================================================

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

- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in Bash.

Software Description:
- bash: GNU Bourne Again SHell

Details:

Michal Zalewski discovered that Bash incorrectly handled parsing certain
function definitions. If an attacker were able to create an environment
variable containing a function definition with a very specific name, these
issues could possibly be used to bypass certain environment restrictions
and execute arbitrary code. (CVE-2014-6277, CVE-2014-6278)

Please note that the previous Bash security update, USN-2364-1, includes
a hardening measure that prevents these issues from being used in a
Shellshock attack.

Update instructions:

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

Ubuntu 14.04 LTS:
  bash                            4.3-7ubuntu1.5

Ubuntu 12.04 LTS:
  bash                            4.2-2ubuntu2.6

Ubuntu 10.04 LTS:
  bash                            4.1-2ubuntu3.5

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

References:
  http://www.ubuntu.com/usn/usn-2380-1
  CVE-2014-6277, CVE-2014-6278

Package Information:
  https://launchpad.net/ubuntu/+source/bash/4.3-7ubuntu1.5
  https://launchpad.net/ubuntu/+source/bash/4.2-2ubuntu2.6
  https://launchpad.net/ubuntu/+source/bash/4.1-2ubuntu3.5


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