MediaTek display组件越界写入本地权限提升漏洞(CVE-2025-20778)

# CVE-2025-20778 PoC - MediaTek Display OOB Write # This PoC demonstrates the vulnerability concept (requires System privileges) # Note: Actual exploitation requires specific MediaTek device and display driver access import os import sys def check_vulnerability(): """ Check if the system is vulnerable to CVE-2025-20778 This is a conceptual PoC - actual exploitation requires: 1. MediaTek-based device 2. System-level privileges 3. Access to display driver interface """ print("[*] CVE-2025-20778 MediaTek Display OOB Write Vulnerability Check") print("[*] Target: MediaTek display driver - Missing bounds check") print("[*] Patch ID: ALPS10184870 | Issue ID: MSV-4729") # 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: print("[+] MediaTek device detected") else: print("[-] No MediaTek device detected") return False except: print("[-] Unable to read CPU info") return False # Check for patch status (simulated) # In production, this would check the actual driver version patch_applied = False if patch_applied: print("[+] Patch ALPS10184870 appears to be applied") print("[+] System may not be vulnerable") return False else: print("[-] System may be vulnerable to CVE-2025-20778") print("[-] Recommendation: Apply MediaTek security update") return True def exploit_concept(): """ Conceptual exploitation steps for CVE-2025-20778: 1. Obtain System privileges (prerequisite) 2. Access display driver interface (/dev/xxx) 3. Craft malicious display buffer request 4. Trigger OOB write via improper bounds checking 5. Escalate privileges or execute code """ print("\n[!] This is a conceptual demonstration only") print("[!] Actual exploitation requires:") print(" - Specific MediaTek chipset") print(" - System privileges already obtained") print(" - Knowledge of display driver internals") if __name__ == "__main__": check_vulnerability() exploit_concept()