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From: aviram at (Aviram Jenik)
Subject: Zaep AntiSpam Cross Site Scripting

 Zaep AntiSpam Cross Site Scripting

Article reference:


Beyond Security has discovered a security vulnerability in 
<> Zaep AntiSpam 2.0, the vulnerability would allow a 
remote attacker to use the Zaep program's CGI to cause it to return third 
party content as if it were its own (A cross-site scripting vulnerability). 
This vulnerability would allow (depending on the web server's configuration 
and site sensitivity) to steal cookies, display  alternative information 
(cross-site defacement), or redirect users to malicious sites.


Vulnerable Systems:
 * Zaep AntiSpam 2.0

Immune Systems:
 * Zaep AntiSpam

Once you send an email to an organization protected by Zaep, a URL like: 
http://vulnerable.zaep/?key=3d981f0f.4056b0a6.23285275 is issued. If you 
modify the URL to include <script>something</script>, the Zaep will convert 
the '/' sign to \, making the script clause not work properly. So far, this 
behavior will "protect" the product from a cross-site scripting 
vulnerability. However, double encoding the / sign (%252F) will bypass this 
conversion, and allow you to insert malicious content (JavaScript, HTML, etc) 
into the page.

Exploit (for all the vulnerabilities):

Vendor response:
The vendor has been very cooperative and has issued a patch to fix this 
problem as soon as they were notified.


The information has been provided by <> Noam 


The information in this bulletin is provided "AS IS" without warranty of any 
In no event shall we be liable for any damages whatsoever including direct, 
indirect, incidental, consequential, loss of business profits or special 

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