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Ubuntu 14.04 LTS USN-2362-1 Moderate: Bash Environment Bypass

ubuntu
Calendar Grey September 24, 2014
Scroller Ubuntu
Shell exploit in Debian 7, 6, and 5 releases permits evasion of environment limitations.
Bash allowed bypassing environment restrictions in certain environments.

Summary

Bash allowed bypassing environment restrictions in certain environments.

Software Description:

- bash: GNU Bourne Again SHell

Details:

Stephane Chazelas discovered that Bash incorrectly handled trailing code in

function definitions. An attacker could use this issue to bypass

environment restrictions, such as SSH forced command environments.

Topics%20covered

Topics Covered

security advisory moderate security issue Ubuntu bash environment restriction THREAT

Update Instructions

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

Ubuntu 14.04 LTS:
  bash                            4.3-7ubuntu1.1

Ubuntu 12.04 LTS:
  bash                            4.2-2ubuntu2.2

Ubuntu 10.04 LTS:
  bash                            4.1-2ubuntu3.1

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

References

https://ubuntu.com/security/notices/USN-2362-1

CVE-2014-6271

Severity
important
Lowest
Low
Medium
High
Critical

September 24, 2014

Topics%20covered

Topics Covered

security advisory moderate security issue Ubuntu bash environment restriction THREAT

Package Information

https://launchpad.net/ubuntu/+source/bash/4.3-7ubuntu1.1
https://launchpad.net/ubuntu/+source/bash/4.2-2ubuntu2.2
https://launchpad.net/ubuntu/+source/bash/4.1-2ubuntu3.1

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