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PR07-12 - Cross-domain redirect on Sun Java System Identity Manager 6.0/7.x

Vulnerability found:
11 June 2007
Vendor informed:
18 June 2007
Severity level:
Medium
Credits:
Jan Fry and Adrian Pastor of ProCheckUp Ltd (www.procheckup.com) ProCheckUp thanks Sun for working with us.
Description:
Sun Java System Identity Manager is vulnerable to cross-domain redirects within the "nextPage" parameter processed by the "/idm/user/login.jsp" server-side script.

Consequences

Attackers can redirect victim users to third-party sites after a successful logon. Such behaviour can help attackers perform phishing attacks.

The following attack scenario has been provided:

1. Victim user is emailed a specially crafted URL

2. Victim user trusts the URL because it contains the legitimate domain name and the browser reports a valid SSL certificate

3. Users logs in successfully

4. User is redirected to a malicious third-party site where he/she is asked to re-enter his/her credentials because an "authentication failure" has ocurred

5. User credentials are then forwarded to a third-party site and captured by the attacker
Successfully tested on
{att:bold}- Server environment{att:/bold}

Sun Java System Identity Manager 6.0 (20061212 SP 2)

Apache-Coyote/1.1

Apache Tomcat/5.0.28

{att:bold}- Client environment{att:/bold}

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

BID

27214
Proof of concept:
The provided PoC URLs redirect users to a third-party site (procheckup.com in this case) after a successful logon:

https://target.tld/idm/user/login.jsp?nextPage=http://procheckup.com

https://target.tld/idm/user/login.jsp?nextPage=http://%70%72%6f%63%68%65%63%6b%75%70%2e%63%6f%6d
How to fix:
http://sunsolve.sun.com/search/document.do?assetkey=1-26-103180-1
References:
http://www.procheckup.com/Vulnerabilities
Legal:
Copyright 2008 ProCheckUp Ltd.

All rights reserved. Permission is granted for copying and circulating this Bulletin to the Internet community for the purpose of alerting them to problems, if and only if the Bulletin is not changed or edited in any way, is attributed to ProCheckUp indicating this web page URL, and provided such reproduction and/or distribution is performed for non-commercial purposes.

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.
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