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Ubuntu Security Notice USN-2364-1

Ubuntu Security Notice USN-2364-1
Posted Sep 27, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2364-1 - Florian Weimer and Todd Sabin discovered that the Bash parser incorrectly handled memory. An attacker could possibly use this issue to bypass certain environment restrictions and execute arbitrary code. In addition, this update introduces a hardening measure which adds prefixes and suffixes around environment variable names which contain shell functions. Various other issues were also addressed.

tags | advisory, arbitrary, shell, bash
systems | linux, ubuntu
advisories | CVE-2014-7186, CVE-2014-7187
SHA-256 | ae34017a4da371e3957cf29ab3e4223ae8d46bc125d31af4b5a3d909728c3d3f

Ubuntu Security Notice USN-2364-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-2364-1
September 27, 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:

Florian Weimer and Todd Sabin discovered that the Bash parser incorrectly
handled memory. An attacker could possibly use this issue to bypass certain
environment restrictions and execute arbitrary code. (CVE-2014-7186,
CVE-2014-7187)

In addition, this update introduces a hardening measure which adds prefixes
and suffixes around environment variable names which contain shell
functions.

Update instructions:

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

Ubuntu 14.04 LTS:
bash 4.3-7ubuntu1.4

Ubuntu 12.04 LTS:
bash 4.2-2ubuntu2.5

Ubuntu 10.04 LTS:
bash 4.1-2ubuntu3.4

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

References:
http://www.ubuntu.com/usn/usn-2364-1
CVE-2014-7186, CVE-2014-7187

Package Information:
https://launchpad.net/ubuntu/+source/bash/4.3-7ubuntu1.4
https://launchpad.net/ubuntu/+source/bash/4.2-2ubuntu2.5
https://launchpad.net/ubuntu/+source/bash/4.1-2ubuntu3.4
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