CVE-2011-3628 Information

Description

Untrusted search path vulnerability in pam_motd (aka the MOTD module) in libpam-modules before 1.1.3-2ubuntu2.1 on Ubuntu 11.10 before 1.1.2-2ubuntu8.4 on Ubuntu 11.04 before 1.1.1-4ubuntu2.4 on Ubuntu 10.10 before 1.1.1-2ubuntu5.4 on Ubuntu 10.04 LTS and before 0.99.7.1-5ubuntu6.5 on Ubuntu 8.04 LTS when using certain configurations such as \session optional pam_motd.so\ allows local users to gain privileges by modifying the PATH environment variable to reference a malicious command as demonstrated via uname.

Reference

http://www.ubuntu.com/usn/USN-1237-1 https://bugs.launchpad.net/ubuntu/2Bsource/pam/2Bbug/610125