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Cross-Site Scriting on Portwise SSL VPN v4.6
From: research <research () procheckup com>
Date: Wed, 17 Feb 2010 17:07:18 +0000

PR09-04: Cross-Site Scriting on Portwise SSL VPN v4.6

Vulnerability found: 25th March 2009

Vendor informed: 28th April 2009

Vulnerability fixed:

Severity: Medium

Description:

The Portwise portal login page is vulnerable to XSS. Portwise is a
SSL-VPN portal.


Note: Other version might be affected as well


The following demonstrate XSS:

1) Login page XSS

https://example.com/wa/auth?&authmech=Assess&reloadFrame=%22;%3Cscript%3Eblah%3C/script%3E%3Cscript%3Ealert(document.cookie)%3C/script%3E



Consequences:

An attacker may be able to cause execution of malicious scripting code
in the browser of a user who clicks on a link to a Portwise Portal-based
site. Such

code would run within the security context of the target domain. This
type of attack can result in non-persistent defacement of the target
site, or the

redirection of confidential information (i.e.: session IDs) to
unauthorised third parties.



Fix:

Ensure all input parameters (especially "reloadFrame") are filtered
sufficiently before beign echoed back to the client.


References:

http://www.procheckup.com/Vulnerabilities.php



Credits: George Christopoulos and Jan Fry of ProCheckUp Ltd
(www.procheckup.com)


Legal:

Copyright 2009 Procheckup Ltd. All rights reserved.

Permission is granted for copying and circulating this Bulletin to the
Internet community for the purpose of alerting them to problems, if and
only if, the

Bulletin is not edited or changed in any way, is attributed to
Procheckup, and provided such reproduction and/or distribution is
performed for non-

commercial purposes.

Any other use of this information is prohibited. Procheckup is not
liable for any misuse of this information by any third party.

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