Versions of OpenSSH prior to 2.1.1 (current circa June, 2000) allow a remote attacker to execute arbitrary commands with the privileges of sshd, typically root.
OpenSSH is a free implementation of versions 1 and 2 of the SSH protocol. If sshd is configured with the UseLogin option, it attempts to use login(1) to authenticate the user. However, is ssh is used to execute a command, the command is run with the privileges of sshd, typically root. UseLogin is not enabled by default.
Remote attackers can run arbitrary commands as root on systems with UseLogin enabled.
Upgrade to the latest version of OpenSSH.
Our thanks to Markus Friedl who reported this information.
This document was written by Shawn V Hernan.
|Date First Published:||2001-11-05|
|Date Last Updated:||2001-11-05 18:59 UTC|