CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// Monitoring & logging

Port 5993: DMTF WBEM CIM REST

Port 5993 is assigned by IANA to cim-rs (DMTF WBEM CIM REST).

5993

How cim-rs works

Monitoring & logging
monitoringdevicecim-rs monitoringdevicecim-rs

The monitoring server collects metrics, alerts or logs from devices over port 5993.

Transport
TCP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Monitoring & logging
01 Security

Is port 5993 dangerous?

We have no specific security note for port 5993. Its risk depends on the program actually listening on it. General advice for monitoring & logging services:

  • Restrict management and monitoring protocols to the monitoring network.
  • Replace community strings and default credentials.
  • Send logs over TLS.
02 Registry

IANA registry entries for port 5993

ServicePortTransportDescriptionReferenceUpdated
cim-rs 5993 TCP DMTF WBEM CIM REST - 2015-04-24
-5993-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 5993, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5993'      # process listening on 5993
sudo lsof -nP -i :5993

macOS

sudo lsof -nP -i :5993

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5993 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5993
netstat -ano | findstr :5993

From another machine

nmap -p 5993 -sV <host>
nc -zv <host> 5993

Block it in the firewall

sudo ufw deny 5993/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5993" -Direction Inbound -LocalPort 5993 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5993 used for?

Port 5993 is assigned by IANA to cim-rs (DMTF WBEM CIM REST).

Is port 5993 TCP or UDP?

Port 5993 is registered for TCP.

Is it safe to open port 5993?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Restrict management and monitoring protocols to the monitoring network.

How do I check if port 5993 is open?

On Linux run "ss -ltnup 'sport = :5993'", on macOS "lsof -nP -i :5993", and on Windows "netstat -ano | findstr :5993" to see the local process. From another machine, "nmap -p 5993 <host>" shows whether it is reachable.

05 Related
:161 SNMP udp · tcp · high risk :162 SNMP trap udp · tcp · moderate risk :9090 Prometheus / admin consoles tcp · udp · high risk :514 Syslog udp · tcp · moderate risk :6514 Syslog over TLS tcp · udp · dccp · low risk :5601 Kibana tcp · udp · high risk :391 SynOptics SNMP Relay Port tcp · udp :412 Trap Convention Port tcp · udp

Latest vulnerability news

All news