Vulnerabilities 2010

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

• Advisory publicly released: Wednesday, 17 February 2010
• Vulnerability found: Wednesday, 25 March 2009
• Vendor informed: Tuesday, 28 April 2009
• Severity level: Medium

• Credits
  George Christopoulos and Jan Fry of ProCheckUp Ltd
  (www.procheckup.com)
• Description
  The Portwise portal login page is vulnerable to XSS. Portwise is a
  SSL-VPN portal.
  
  
  Note: Other version might be affected as well
• Proof of concept
  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.
• How to fix
  Ensure all input parameters (especially "reloadFrame") are filtered
  sufficiently before beign echoed back to the client.
• References
  
  
• Legal
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