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==========================================================Multiple DOM-Based XSS in Dojo Toolkit SDK
Public Release Date: 3/12/2010
Adam Bixby - Gotham Digital Science (labs@gdssecurity.com)
Affected Software: Dojo Toolkit SDK <= Build 1.4.1
Browser used for testing: IE8 (8.0.7600.16385)
Severity: High
==========================================================1. Summary
==========================================================
The Dojo Toolkit is an open source modular JavaScript library/toolkit designed to ease the rapid development of cross platform, JavaScript/Ajax based applications and web sites. Multiple instances of DOM-based Cross Site Scripting (XSS) vulnerabilities were found in the _testCommon.js and runner.html files within the SDK. The XSS vulnerabilities appear to affect all websites that deploy any of the affected SDK files. These files are designed for testing, however a Google search identified numerous sites which have deployed these files along with the core framework components.
More information on DOM-based XSS can be found at http://www.owasp.org/index.php/DOM_Based_XSS.
The vendor (Dojo Foundation) was notified of this issue on February 19, 2010. The vendor responded by releasing version 1.4.2 on March 12, 2010 and has also issued a security bulletin: http://dojotoolkit.org/blog/post/dylan/2010/03/dojo-security-advisory/.
==========================================================2. Technical Details
==========================================================
File: dojo-release-1.4.1-src\dojo-release-1.4.1-src\dijit\tests\_testCommon.js
1) Data enters via "theme" URL parameter through the window.location.href property.
Line 25:
var str = window.location.href.substr(window.location.href.indexOf("?")+1).split(/#/);
..snip..
2) The "theme" variable with user-controllable input is then passed into "themeCss" and "themeCssRtl" which is then passed to document.write(). Writing the un-validated data to HTML creates the XSS exposure.
Line 54:
..snip..
var themeCss = d.moduleUrl("dijit.themes",theme+"/"+theme+".css");
var themeCssRtl = d.moduleUrl("dijit.themes",theme+"/"+theme+"_rtl.css");
document.write('');
document.write('');
==========================================================
File: dojo-release-1.4.1-src\dojo-release-1.4.1-src\util\doh\runner.html
1) Data enters via "dojoUrl" or "testUrl" URL parameters through the window.location.search property.
Line 40:
var qstr = window.location.search.substr(1);
..snip..
2) The "dojoUrl" and "testUrl" variables with user-controllable input are passed to document.write(). Writing the un-validated data to HTML creates the XSS exposure.
Line 64:
document.write("