IBM Websphere Portal Cross Site Scripting

`Hacktics Research Group Security Advisory   
http://www.hacktics.com/#view=Resources%7CAdvisory  
  
By Oren Hafif, Hacktics.  
24-Feb-2010  
  
===========  
I. Overview  
===========  
During a penetration test performed by Hacktics' experts, certain  
vulnerabilities were identified in an IBM Websphere Portal Server and Lotus  
Web Content Management deployment. Further research has identified that the  
login page of the IBM Lotus Workplace Web Content Management is vulnerable  
to Reflected Cross Site Scripting attacks.  
  
A friendly formatted version of this advisory is available in:  
http://www.hacktics.com/content/advisories/AdvIBM20100224.html  
  
===============  
II. The Finding  
===============  
An attacker can inject script into a URL pointing at the vulnerable page,  
and attack system users by sending it to them. Users, who follow the link,  
will be attacked with the injected script.  
  
============  
III. Details  
============  
The login page takes the query string from the request URL and embeds it  
into the HTML response as the value of a form field named success. The  
attack is done by escaping the field (">), followed by the relevant script,  
as seen in the following URL:  
  
http://[host]:[port]/wps/wcm/webinterface/login/login.jsp?"><script>maliciou  
s_script</script><b%20"  
  
Note: The content of this parameter is used as part of a page redirection  
performed after the login. Even without XSS exploitation, this can be used  
for invalidated redirection.  
  
===========  
IV. Exploit  
===========  
The exploit is performed by replacing malicious_script with the relevant  
javascript payload. An evasion for simple XSS signature protection (where  
applicable), can allow executing the same script without using HTML tags, as  
seen in the following sample:  
http://[host]:[port]/wps/wcm/webinterface/login/login.jsp?"  
style="tr:expression(malicious_script)  
  
  
=============================  
V. Vendor's Response/Solution  
=============================  
IBM has released a patch for this vulnerability, as well as a proposed  
workaround. For additional details please refer to:  
http://www-01.ibm.com/support/docview.wss?uid=swg21421469  
  
====================  
VI. Affected Systems  
====================  
WebSphere Portal, Lotus Web Content Management and Workspace Web Content  
Management versions:  
6.1.0.0, 6.1.0.1, 6.1.0.2, 6.1.0.3, 6.1.5.0  
6.0.1.0, 6.1.0.2, 6.1.0.3, 6.1.0.4, 6.1.0.5, 6.1.0.6, 6.1.0.7  
6.0.0.0, 6.0.0.1, 6.0.0.2, 6.0.0.3, 6.0.0.4  
5.1.0.0, 5.1.0.1, 5.1.0.2, 5.1.0.3, 5.1.0.4, 5.1.0.5  
Lotus Quickr services for WebSphere Portal versions:  
8.0, 8.0.0.2, 8.1, 8.1.1, 8.1.1.1  
  
===========  
VII. Credit  
===========  
The vulnerability was discovered by Oren Hafif of Hacktics Ltd.  
  
---  
Ofer Maor  
CTO, Hacktics  
Chairman, OWASP Israel  
  
Web: www.hacktics.com  
  
  
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