Vulnerabilities 2009

PR08-23 XSS on Novell GroupWise WebAccess

• Advisory publicly released: Friday, 30 January 2009
• Vulnerability found: Thursday, 2 October 2008
• Vendor informed: Friday, 3 October 2008
• Severity level: Medium

• Credits
  Richard Brain of ProCheckUp Ltd (www.procheckup.com). ProCheckUp thanks Novell for working with us in such a professional manner.
• Description
  Novell GroupWise WebAcces is vulnerable to a vanilla XSS (non-persistent) via POST requests. Although filtering takes place for GET requests, POST requests are ignored.
  
  Vulnerable server-side script: '/gw/webacc',
  Unfiltered parameter: 'User.id', 'Library.queryText'
• Proof of concept
  As kindly requested by Novell, ProCheckUp will delay publication of the PoC details to allow GroupWise customers time to apply the recommended security patches.
• How to fix
  http://www.novell.com/support/search.do?usemicrosite=true&searchString=7002321
• Sucessfully tested on
  Novell GroupWise WebAccess 7.0.3
  
  Novell has confirmed the following versions to be affected by this vulnerability:
  
  GroupWise 6.5x
  GroupWise 7.0, 7.01, 7.02x, 7.03
  GroupWise 8.0 (shipping 8.0 release only)
• CVE reference
  CVE-2009-0273
• Consequences
  An attacker may be able to cause execution of malicious scripting code in the browser of a victim user who visits a malicious third-party page. 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, address books, emails) to unauthorised third parties.
• References
  

  
  http://www.procheckup.com/vulnerability_manager

  
  http://en.wikipedia.org/wiki/Cross-site_scripting

  
  
• Legal
  Copyright 2009 ProCheckUp Ltd. All rights reserved.
  
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  Any other use of this information is prohibited. ProCheckUp is not liable for any misuse of this information by any third party. ProCheckUp is not responsible for the content of external Internet sites.