Connectrix serie MDS: El servidor SSL o TLS es compatible con la seguridad de capa de transporte TLS1.1

"El servidor de capa de conexión segura (SSL) o seguridad de capa de transporte (TLS) soporta la seguridad de capa de transporte (TLSv1.1)"

Threat: The scan target supports version 1.1 of the TLS protocol. That version is in the process of being deprecated and is no longer recommended. Instead the newer versions 1.2 and/or 1.3 should be used. The TLSv1.1 protocol itself does not have any currently exploitable vulnerabilities. However some vendor implementations of TLSv1.1 have weaknesses which may be exploitable. This QID is posted as potential, when servers require client certificates and we cannot complete the handshake.

Resultados: TLSv1.1 es compatible.

Solution: Disable the use of TLSv1.1 protocol in favor of a cryptographically stronger protocol such as TLSv1.2.
The following openssl commands can be used to do a manual test: openssl s_client -connect ip:port -tls1_1
If the test is successful, then the target support TLSv1.1.

Capture el resultado del siguiente comando del switch:

`show file volatile:///nxapi.log`

HTTPS port is 8443
Options gathered - vdc: 1, servers: 4, http: -1, https: 8443,
cert: /var/nginx/cert/server.crt_vdc_1, key: /var/nginx/cert/server.key_vdc_1, sandbox: false, protocols: TLSv1.2, ciphers: false

Esto significa que TLS 1.0 y 1.1 están deshabilitados y TLS v1.2 está habilitado en el switch. Por lo tanto, se puede concluir que la vulnerabilidad es un falso positivo.

Si aún acepta TLSv1 y TLSv1.1, puede configurar manualmente las versiones de TLS utilizadas:

switch(config)# nxapi ssl protocols TLSv1.2          <--To enable TLSv1.2

switch(config)# no nxapi ssl protocols TLSv1         <--To disable TLSv1-disabling TLSv1 removes TLS 1.0 and 1.1.