Attempts to discover DICOM servers (DICOM Service Provider) through a partial C-ECHO request. It also detects if the server allows any called Application Entity Title or not.
The script responds with the message "Called AET check enabled" when the association request is rejected due configuration. This value can be bruteforced.
C-ECHO requests are commonly known as DICOM ping as they are used to test connectivity. Normally, a 'DICOM ping' is formed as follows:
- Client -> A-ASSOCIATE request -> Server
- Server -> A-ASSOCIATE ACCEPT/REJECT -> Client
- Client -> C-ECHO request -> Server
- Server -> C-ECHO response -> Client
- Client -> A-RELEASE request -> Server
- Server -> A-RELEASE response -> Client
For this script we only send the A-ASSOCIATE request and look for the success code in the response as it seems to be a reliable way of detecting DICOM servers.
dicom.called_aet, dicom.calling_aetSee the documentation for the dicom library.
nmap -p4242 --script dicom-ping <target>
nmap -sV --script dicom-ping <target>
PORT STATE SERVICE REASON 4242/tcp open dicom syn-ack | dicom-ping: | dicom: DICOM Service Provider discovered! |_ config: Called AET check enabled
License: Same as Nmap--See https://nmap.org/book/man-legal.html