PR08-23: XSS on Novell GroupWise WebAccess
Vulnerability found: 2nd October 2008
Vendor contacted: 3rd October 2008
Advisory publicly released: 30th January 2009
Credits: Richard Brain of ProCheckUp Ltd (www.procheckup.com). ProCheckUp thanks Novell for working with us in such a professional manner.
Successfully 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
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.
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.
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