SEC Consult SA-20141015-0 :: Potential Cross-Site Scripting in ADF Faces

SEC Consult Vulnerability Lab Security Advisory < 20141015-0 >
============================================================
===========
              title: Potential Cross-Site Scripting
            product: ADF Faces
 vulnerable version: 12.1.2.0
      fixed version: versions with CPU Oct-2014 patch applied
             impact: low
           homepage: http://www.oracle.com/adf
              found: 2014-05-01
                 by: W. Ettlinger
                     SEC Consult Vulnerability Lab
                     https://www.sec-consult.com
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Vendor description:
- -------------------
"Oracle ADF is an end-to-end Java EE framework that simplifies application
development by providing out-of-the-box infrastructure services and a visual
and declarative development experience."

URL: http://www.oracle.com/technetwork/developer-tools/adf/overview/index.html


Vulnerability overview/description:
- -----------------------------------
The ADF JSF implementation (ADF Faces) does not properly encode URLs specified
as a target to the goButton component. As this behavior is neither intuitive
nor documented in the component documentation [1] an application developer may
allow a user to specify destination URLs. In such an application, an
attacker is able to specify JavaScript code that is executed in the victims
browser as soon as the victim clicks on the goButton component.

[1] http://jdevadf.oracle.com/adf-richclient-demo/docs/tagdoc/af_goButton.html

Proof of concept:
- -----------------
The following snippet demonstrates a vulnerable JSF page:

[...]
<af:goButton destination="#{param['url']}" text="Continue to URL"/>
[...]

If this JSF page is called using the following URL, JavaScript code is
injected:

http://<host>/<path>?test=%27*alert%28%27XSS!%27%29*%27

As soon as the victim clicks on the goButton component the attackers code is
executed.


Vulnerable / tested versions:
- -----------------------------
The version 12.1.2.0 of ADF Faces was found to be vulnerable. This was the
latest version at the time of discovery.


Vendor contact timeline:
- ------------------------
2014-05-21: Contacting vendor through secalert_us@oracle.com
2014-05-22: Oracle confirms receipt of the advisory and says that
            vulnerability is being investigated (BUG ID: S0454750)
2014-05-23: Oracle states that this vulnerability (when confirmed)
            will be addressed on an upcoming CPU
2014-06-25: Oracle confirms vulnerability, says it will be addressed
            with the next CPU
2014-10-14: Oracle publishes the CPU
2014-10-15: SEC Consult releases a coordinated security advisory


Solution:
- ---------
Update to the newest version.

More information can be found at:
http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html


Workaround:
- -----------
As a workaround the "button" component can be used to replace the
"goButton" component.


Advisory URL:
- -------------
https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm


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EOF W. Ettlinger / @2014