V-235874

Discussion

By default docker UCP is configured to use TLS v1.2, if this setting is misconfigured, older protocols containing security weaknesses could be utilized. TLS requires a handshake between client and server which is where the TLS version utilized in the connection is negotiated. For DoD use cases, all TLS must be at version 1.2.

Check Content

This check only applies to the UCP component of Docker Enterprise.

Via CLI:

Linux (requires curl and jq): As a Docker EE Admin, execute the following commands from a machine that can communicate with the UCP management console. Replace [ucp_url] with the UCP URL, [ucp_username] with the username of a UCP administrator and [ucp_password] with the password of a UCP administrator.

AUTHTOKEN=$(curl -sk -d '{"username":"[ucp_username]","password":"[ucp_password]"}' https://[ucp_url]/auth/login | jq -r .auth_token)
curl -sk -H "Authorization: Bearer $AUTHTOKEN" https://[ucp_url]/api/ucp/config-toml

Look for the "min_TLS_version =" entry under the "[cluster_config]" section in the output, and verify that it is set to "TLSv1.2".

If the "min_TLS_version" entry under the "[cluster_config]" section in the output is not set to "TLSv1.2", then this is a finding.