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USN-2155-1: OpenSSH vulnerability

25 March 2014

OpenSSH incorrectly handled environment restrictions with wildcards.



  • openssh - secure shell (SSH) for secure access to remote machines


Jann Horn discovered that OpenSSH incorrectly handled wildcards in
AcceptEnv lines. A remote attacker could use this issue to possibly bypass
certain intended environment variable restrictions.

Update instructions

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

Ubuntu 13.10
Ubuntu 12.10
Ubuntu 12.04
Ubuntu 10.04

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