Cheese is a worm that is able to propagate from a Linux based system to another. It scans random Class B subnetworks for machines that are infected with a Lion worm, and if such systems are found, it copies itself to the victim to to directory "/tmp/.cheese".
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
When the worm executes, it removes all lines that contain string "/bin/sh" from the "/etc/inetd.conf" and restarts inetd service. This effectively removes an open shell installed by Lion worm.
After that Cheese will start to scan for other machines to infect.
Technical Details: Sami Rautiainen, F-Secure; May 2001