Zaep AntiSpam Cross Site Scripting
Zaep AntiSpam Cross Site Scripting
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Article reference:
http://www.securiteam.com/windowsntfocus/5EP0I15CKK.html
SUMMARY
Beyond Security has discovered a security vulnerability in
<http://www.zaep.com/> 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.
DETAILS
Vulnerable Systems:
* Zaep AntiSpam 2.0
Immune Systems:
* Zaep AntiSpam 2.0.0.2
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):
http://vulnerable.zaep/?key=<script>alert(document.cookie)<%252Fscript>
Vendor response:
The vendor has been very cooperative and has issued a patch to fix this
problem as soon as they were notified.
ADDITIONAL INFORMATION
The information has been provided by <mailto:expert@xxxxxxxxxxxxxx> Noam
Rathaus.
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