ISC guestbook script injection vulnerability.

["drG4njubas" <drG4nj () mail ru>]

This advisory can be found at www.blacktigerz.org

Date:
08.04.2003

Subject:
ISC guestbook script injection vulnerability.

Description:
Free, easy to use asp powered guestbook. 
Main fetures are: web-based administration, 
bad word filtering.

Vendor:
http://www.isc-online.at

Download:
http://www.isc-online.at/downloads/gb.zip

Vulnerability:
gb_eintragen.asp neglects filtering user input allowing 
for script injection to the guestbook via "Ihr Name", 
"Ihre EMail" and "Ihre Homepage" fields. The injected 
script will be executed in anyones browser who visits the 
guestbook.


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