CVE-2025-20766: MediaTek显示组件内存损坏权限提升漏洞

# CVE-2025-20766 PoC - MediaTek Display Memory Corruption # This is a conceptual proof of concept for educational purposes only # DO NOT use for unauthorized testing import os import sys def check_vulnerability(): """ Check if the system is potentially vulnerable to CVE-2025-20766 MediaTek Display Component Memory Corruption """ print("[*] Checking for CVE-2025-20766 vulnerability...") # Check if running on MediaTek device try: with open('/proc/cpuinfo', 'r') as f: cpuinfo = f.read() if 'MediaTek' in cpuinfo or 'mt' in cpuinfo.lower(): print("[+] MediaTek chip detected") else: print("[-] No MediaTek chip detected") return False except: print("[-] Cannot read CPU info") return False # Check kernel version (vulnerability affects specific versions) kernel_version = os.popen('uname -r').read().strip() print(f"[*] Kernel version: {kernel_version}") # Check if vulnerable display driver is loaded display_drivers = ['mtk_drm', 'mtk_mali', 'mali'] loaded_drivers = os.popen('lsmod').read() for driver in display_drivers: if driver in loaded_drivers: print(f"[!] Display driver '{driver}' is loaded") print("[!] System may be vulnerable to CVE-2025-20766") return True print("[-] No vulnerable display driver detected") return False def trigger_vulnerability(): """ Attempt to trigger the memory corruption via display interface WARNING: This is for authorized security testing only """ print("[!] Attempting to trigger vulnerability...") print("[!] This requires elevated privileges and proper authorization") # Vulnerable ioctl call to display driver # The actual exploit would target specific memory corruption in display buffer vulnerable_ioctl = 0x12345678 # Example ioctl code # Construct malicious input to trigger improper validation # This would cause memory corruption due to missing bounds checking malicious_payload = b'A' * 1024 # Overflow payload print("[*] Constructing malicious display buffer...") print("[*] Triggering improper input validation in display component...") print("[!] In a real exploit, this would corrupt kernel memory") # The actual exploitation would involve: # 1. Opening /dev/mtk_disp or similar display device # 2. Sending crafted ioctl with oversized buffer # 3. Overwriting function pointers or critical kernel structures # 4. Escalating privileges via corrupted kernel data return False if __name__ == '__main__': print("=" * 60) print("CVE-2025-20766 - MediaTek Display Memory Corruption PoC") print("=" * 60) if os.geteuid() != 0: print("[!] Warning: This script should be run as root for full testing") is_vulnerable = check_vulnerability() if is_vulnerable: print("\n[!] System appears to be vulnerable!") print("[!] Recommendation: Apply MediaTek security patch ALPS10196993") else: print("\n[+] System does not appear to be vulnerable")