CVE-2025-20786: MediaTek显示组件Use After Free本地权限提升漏洞

#!/usr/bin/env python3 """ CVE-2025-20786 PoC - MediaTek Display Use After Free Note: This is a conceptual PoC for educational purposes only. Actual exploitation requires kernel debugging and device-specific analysis. """ import os import sys def check_vulnerability(): """ Check if the system is vulnerable to CVE-2025-20786 This requires checking MediaTek display driver version """ print("[*] Checking for CVE-2025-20786 vulnerability...") print("[*] Target: MediaTek Display Component") print("[*] Vulnerability Type: Use After Free") # Check if running on MediaTek device try: with open('/proc/cpuinfo', 'r') as f: cpuinfo = f.read() if 'MediaTek' not in cpuinfo: print("[-] This PoC is designed for MediaTek devices only") return False except: print("[-] Unable to read system information") return False print("[*] MediaTek device detected") print("[*] Checking display driver version...") # The actual exploitation requires: # 1. Finding the vulnerable display driver function # 2. Triggering the use-after-free condition # 3. Heap spraying to control freed memory # 4. Overwriting function pointers for privilege escalation print("[*] To exploit this vulnerability:") print(" 1. Attacker needs SYSTEM privileges first") print(" 2. Trigger display buffer free operation") print(" 3. Spray heap with controlled data before reallocation") print(" 4. Trigger access to freed memory to hijack execution") print(" 5. Achieve ROOT privilege escalation") print("\n[!] This is a LOCAL privilege escalation exploit") print("[!] Requires prior SYSTEM access to the device") print("[!] Patch ID: ALPS10149882") print("[!] Issue ID: MSV-4673") return None # Returns None as actual exploitation requires device access if __name__ == "__main__": check_vulnerability()