Recourse ManTrap 1.6 does not properly hide processes from attackers, which could allow attackers to determine that they are in a honeypot system by comparing the results from kill commands with the process listing in the /proc filesystem.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5473
http://archives.neohapsis.com/archives/bugtraq/2000-11/0100.html