Apachetop creates temporary files insecurely thus allowing a malicious user to create and overwrite arbitrary files with the privileges of the user running the affected script.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/40385/apachetop-09022005.txt
Source: https://packetstormsecurity.com/files/40385/apachetop-09022005.txt.html