XSS in Snitz Forum 2000
Sec-Tec Advisory - XSS in Snitz Forums 2000
The most up to date version of this advisory can always be found at:
www.sec-tec.co.uk/vulnerability/snitzxss.html
Advisory creation date: 6th May 2004
Product: Snitz Forums 2000
Tested version: 3.4.04 (older versions believed to be affected also)
Vulnerability: XSS
Discoverd by: Pete Foster - Sec-Tec Ltd (www.sec-tec.co.uk)
Product:
Snitz Forums 2000 is an interactive discussion environment that allows
different people on the Internet or an Intranet to leave messages for each
other, and then reply.
Description:
When registering a new account the register.asp script fails to properly
sanitize the E-mail address (Email) field. An attacker can enter specially
crafted strings into this field that can allow him to launch cross-site
scripting (XSS) attacks. Successful exploitation of this could lead to the
theft of sensitive information, such as valid session details.
Affected object:
register.asp
POC Exploit:
When registering a new account (or ammending an existing one), enter the
following as an email address:
p@p" onMouseOver="alert(document.cookie);
When a user then follows a link to send the attacker an email, the script
code is executed.
Fix:
The Email field should be filtered to remove dangerous characters.
The vendor has given details that fixes the symptoms.
--- Vendor quote ---
On line #184 of pop_mail.asp:
Change this: rs("M_EMAIL")
To this: chkString(rs("M_EMAIL"),"display")
--- End vendor quote ---
Vendor fix details can also be found at:
http://forum.snitz.com/forum/topic.asp?TOPIC_ID=53360
Release timeline:
Vulnerability discovered: April 29th 2004
Vendor notified: May 6th 2004
Vendor response: June 11th 2004
Public release: June 16th 2004
If using this document, please link to:
http://www.sec-tec.co.uk/vulnerability/snitzxss.html
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