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

Date Found: 11th June 2007

Vendor Contacted: 18th June 2007

Severity: Medium

BID: 27214

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

Proof of concept (PoC):

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

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:

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