USN-2364-1: Bash vulnerabilities

Releases

• Ubuntu 14.04 ESM
• Ubuntu 12.04
• Ubuntu 10.04

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.

Update instructions

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

Ubuntu 14.04

• bash - 4.3-7ubuntu1.4

Ubuntu 12.04

• bash - 4.2-2ubuntu2.5

Ubuntu 10.04

• bash - 4.1-2ubuntu3.4

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

References

• CVE-2014-7186
• CVE-2014-7187