: HTTP (often managed by the Windows HTTP Server API, http.sys )
Securing port 5357 and the services it hosts is a multi-layered process:
In complex enterprise environments, web service discovery protocols can sometimes be coerced into making outbound requests. If an attacker can inject a malicious URL into a discovery request, they might trigger a Server-Side Request Forgery (SSRF) or force the system to authenticate against a malicious SMB share, capturing NetNTLM hashes. 4. Remediation and Hardening port 5357 hacktricks
Port 5357 is more than just an obscure port – it’s a potential entry point for unauthenticated info leaks, NTLM relaying, and legacy RCE. While not as juicy as 445, it’s often overlooked, making it a reliable target for lateral movement during internal penetration tests.
This sends a Probe message and lists all advertised devices, their types, scopes, and metadata addresses. : HTTP (often managed by the Windows HTTP Server API, http
Because the service runs over HTTP, you can query it using standard web tools. curl -i http:// :5357/ Use code with caution. Checking Common Paths
A historic but classic example where an attacker could send a crafted HTTP request with a malicious Range header to execute arbitrary code or trigger a Blue Screen of Death (BSOD) via kernel memory corruption. Any open HTTP port powered by http.sys (including 5357) could be used as the entry point. 2. Information Disclosure & Internal Reconnaissance Remediation and Hardening Port 5357 is more than
Interacting directly with the root directory of port 5357 via web browsers or automated scripts like curl usually yields a default HTTP Error 503: The service is unavailable response. This is intended behavior; the endpoint expects explicit XML queries rather than standard browser requests.
If a vulnerability or misconfiguration allows an attacker to coerce a service running over port 5357 to authenticate against an attacker-controlled server, those credentials can be relayed to other machines on the network where SMB signing is disabled. 4. Remediation and Defense
You can use curl to inspect the response headers. This can verify if the host is running a modern Windows environment. curl -I http:// :5357/ Use code with caution. Advanced Enumeration: Discovering Endpoints
If the endpoint requires NTLM authentication (e.g., for GetPrinterData action), you can trigger an authentication attempt: