Ubuntu Security Notice USN-2380-1
9th October, 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
– The 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 version:
- 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
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.