[USN-3294-2] Bash vulnerability

[Leonidas S. Barbosa]

==========================================================================
Ubuntu Security Notice USN-3294-2
August 01, 2017

bash vulnerability
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

A security issues were fixed in Bash.

Software Description:
- bash: GNU Bourne Again SHell

Details:

USN-3294-1 fixed a vulnerability in Bash. This update provides the
corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that Bash incorrectly handled the SHELLOPTS and PS4
 environment variables. A local attacker could use this issue to
 execute arbitrary code with root privileges. (CVE-2016-7543)

Update instructions:

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

Ubuntu 12.04 ESM:
  bash                            4.2-2ubuntu2.7

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

References:
  https://www.ubuntu.com/usn/usn-3294-2
  https://www.ubuntu.com/usn/usn-3294-1
  CVE-2016-7543
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