PR08-22: Persistent XSS on Novell GroupWise WebAccess

Vulnerability found: 2nd October 2008

Vendor contacted: 3rd October 2008

Advisory publicly released:  30th January 2009

Severity: High

Credits: Jan Fry of ProCheckUp Ltd (www.procheckup.com). ProCheckUp 
thanks Novell for working with us in such a professional manner.

Successfully tested on: Novell GroupWise WebAcess 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

Description:

Novell GroupWise Webaccess (7.0.3) is vulnerable to a *persistent* XSS
via HTML email or HTML attachments.

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._

 Consequences:

An attacker may be able to cause execution of malicious scripting code
in the browser of any user. Such code would run within the security
context of the target domain.

This type of attack can result in a persistent defacement of the target
site, or the redirection of confidential information (i.e.: session IDs,
address books, emails) to unauthorised third parties.

Since this XSS is of persistent nature, the user wouldn't have to be
tricked to visit a specially-crafted URL, but just read an e-mail.


References:

http://www.procheckup.com/vulnerability_manager 
http://en.wikipedia.org/wiki/Cross-site_scripting 

Fix:
http://www.novell.com/support/search.do?usemicrosite=true&searchString=7002320 


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