Zaep AntiSpam Cross Site Scripting ------------------------------------------------------------------------ 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@securiteam.com> Noam Rathaus. ==================== ==================== DISCLAIMER: The information in this bulletin is provided "AS IS" without warranty of any kind. In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.
