CGI-City's CCGuestBook Script Injection Vulnerabilities Discovered By BrainRawt (brainrawt (at) hotmail (dot) com [email concealed]) About CCGuestBook: ------------------ CC Guestbook is a simple guestbook program that is very easy to configure and install. It features a notification facility which sends an email alert to the guestbook owner whenever new entries are made. It may also be used as a post-it board to allow visitors to a web site to just post messages. CCGuestBook can be downloaded from the following address. http://www.icthus.net/CGI-City/scr_cgicity.shtml#CCGUEST Vendor Contact: ---------------- 1-30-03 Emailed cgicity (at) icthus (dot) net [email concealed] No Response Vulnerability: ---------------- cc_guestbook.pl neglects filtering user input allowing for script injection to the guestbook via "name" and "webpage title". The injected script will be executed in anyones browser who visits the guestbook. Exploit (POC): ---------------- <script>alert('obvious?')</script> _________________________________________________________________ Protect your PC - get McAfee.com VirusScan Online http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963