CVE-2025-20789 MediaTek GPU pdma 信息泄露漏洞

# CVE-2025-20789 PoC - MediaTek GPU pdma Information Disclosure # This PoC demonstrates the concept of bounds check bypass in GPU PDMA import ctypes import struct class GPUPDMABoundsCheckBypass: """ Proof of Concept for CVE-2025-20789 MediaTek GPU PDMA Missing Bounds Check Information Disclosure """ def __init__(self): self.patch_id = "ALPS10117741" self.issue_id = "MSV-4538" def trigger_bounds_check_bypass(self, malicious_addr): """ Trigger the bounds check bypass in GPU PDMA Args: malicious_addr: Out-of-bounds memory address to access Returns: Leaked data if successful, None otherwise """ # Simulate GPU PDMA operation structure pdma_request = { 'src_addr': malicious_addr, 'dst_addr': 0x10000000, 'size': 0x1000, 'flags': 0x01 # PDMA flag } # Vulnerable: No bounds check on src_addr # In real scenario, this would access memory beyond intended region try: # Simulate memory read without bounds validation leaked_data = self._gpu_memory_read(pdma_request) return leaked_data except Exception as e: print(f"Error: {e}") return None def _gpu_memory_read(self, request): """ Simulated GPU memory read operation In vulnerable version: No bounds checking In patched version: Should validate address range """ # Vulnerable code pattern (DO NOT USE IN PRODUCTION) # if not self._validate_bounds(request['src_addr']): # raise SecurityException("Bounds check failed") # Simulate reading arbitrary memory print(f"[!] Reading from potentially out-of-bounds address: {hex(request['src_addr'])}") return b"LEAKED_DATA_SIMULATION" def check_vulnerability_status(self): """ Check if system is vulnerable to CVE-2025-20789 """ # In real implementation, this would check: # 1. MediaTek GPU driver version # 2. Patch level (ALPS10117741) # 3. System vulnerability status print(f"[*] Checking vulnerability status...") print(f"[*] Patch ID: {self.patch_id}") print(f"[*] Issue ID: {self.issue_id}") print("[*] Please update to patched version to mitigate this vulnerability") if __name__ == "__main__": poc = GPUPDMABoundsCheckBypass() poc.check_vulnerability_status() # Demonstrate potential exploit scenario # Target address beyond valid range malicious_address = 0xFFFFFFFF - 0x1000 result = poc.trigger_bounds_check_bypass(malicious_address) if result: print(f"[!] Successfully triggered information disclosure")