[NT] VPOP3 Web Mail Cross-Site Scripting Vulnerability

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To: list@securiteam.com
Date: 20 Oct 2003 15:37:50 +0200

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  VPOP3 Web Mail Cross-Site Scripting Vulnerability
------------------------------------------------------------------------

SUMMARY

 <http://www.pscs.co.uk/products/vpop3/index.html> VPOP3 is "an Internet
email server and gateway for small and medium sized businesses". A
security vulnerability in the product allows remote attackers to steal the
authentication cookie stored by the server, by inserting malicious HTML
and/or JavaScript into the login page.

DETAILS

Vulnerable systems:
 * VPOP3 version 2.0.0e
 * VPOP3 version 2.0.0f

Immune systems:
 * VPOP3 version 2.0.0g

By requesting a specially crafted URL, it is possible to cause the VPOP3's
Web Mail server to return arbitrary HTML and/or JavaScript, by using a URL
such as:
http://192.168.1.212:5108/index.html?redirect=admin/index.html";%0Dalert(document.cookie);%0D//

It is possible to steal the cookie (used for authentication) from a user
(preferably the administrator) and to impersonate him.

ADDITIONAL INFORMATION

The information has been provided by <mailto:expert@securiteam.com>
SecurITeam Experts.

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