USN-2364-1: Bash vulnerabilities

Publication date

27 September 2014

Overview

Several security issues were fixed in Bash.


Packages

  • 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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
14.04 trusty bash –  4.3-7ubuntu1.4
12.04 precise bash –  4.2-2ubuntu2.5
10.04 lucid bash –  4.1-2ubuntu3.4

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