Port 5357 can expose a system to several severe vulnerabilities depending on the underlying Windows patch level and service configuration. 1. HTTP.sys Remote Code Execution (CVE-2015-1635)
Operational guidance for red teams and defenders
If automatic device discovery is not needed in the enterprise environment, disable the following Windows services via Group Policy (GPO): Function Discovery Provider Host ( fdPHost ) Function Discovery Resource Publication ( FDResPub ) port 5357 hacktricks
When auditing a network via an Nmap scan, port 5357 typically presents with specific structural signatures: nmap -p 5357 -sV -sC Use code with caution. Expected Scan Output
Furthermore, the existence of this service suggests a broader security misconfiguration: the reliance on legacy discovery protocols. Port 5357 often works in tandem with UDP port 5355 (LLMNR) and UDP port 5353 (mDNS). The presence of port 5357 signals to an attacker that the network may be reliant on legacy broadcasting mechanisms. This opens the door to more complex attacks, such as LLMNR/NBT-NS poisoning (via tools like Responder). If a system is broadcasting its existence on port 5357, it is highly likely listening for name resolution requests on associated ports, allowing an attacker to intercept traffic and potentially capture password hashes by spoofing legitimate server responses. Port 5357 can expose a system to several
Before attempting any exploitation, you must gather as much metadata as possible from the endpoint. Because Port 5357 hosts an HTTP server, traditional web enumeration tools apply. Nmap Scanning
WSD services occasionally make outbound connections or attempt to authenticate when parsing complex SOAP/XML payloads. If an application or service on the host can be coerced into authenticating against an attacker-controlled machine, it may leak NetNTLM hashes that can be cracked offline or relayed to compromise other network resources. Defensive Countermeasures and Remediation Expected Scan Output Furthermore, the existence of this
Do not run intrusive exploitation against systems you don’t own or have permission to test.