CVE-2025-46597: Bitcoin Core整数溢出漏洞

# Conceptual Proof of Concept for Integer Overflow # This script demonstrates the logic of triggering an integer overflow. # It is for educational purposes only. import struct def trigger_overflow_simulation(): # Simulate a length field that causes overflow when added to a header size MAX_UINT32 = 0xFFFFFFFF header_size = 24 # Attacker controls this value. Calculation: (malicious_len + header_size) overflows # We want (malicious_len + header_size) to be small, e.g., 100, to pass checks # But actual malloc uses the overflowed result. malicious_len = (100 - header_size) % (MAX_UINT32 + 1) print(f"Simulating payload with length field: {malicious_len}") # Simulate the vulnerable calculation allocated_size = malicious_len + header_size print(f"Vulnerable calculation result (Allocated Size): {allocated_size}") # If the logic checks 'malicious_len' but allocates based on overflowed result, # a large memcpy will crash the node. if allocated_size < 1000: print("[!] Overflow occurred: Small buffer allocated for large payload.") print("[!] Potential for Denial of Service (Crash).") if __name__ == "__main__": trigger_overflow_simulation()