By Michael Brooks
Vulnerability type: Multiple Remote System commands execution.
Software: Anon Proxy Server
Affects version: 0.100
A virtually identical flaw exists in diagconnect.php however it takes longer to execute.
Anon Proxy Server forces magic_quotes_gpc=on, However magic_quotes_gpc does not protect the system() function from taint. For protection you should use the escapeshellarg() function. Removing diagdns.php and diagconnect.php is the best temporary solution. Also magic_quotes_gpc is being removed in php6, so Anon Proxy Server will have to revamp there security.