      server.on('connection', mustCall((conn) => {
        conn.on('authentication', mustCall((ctx) => {
          assert(ctx.method === 'none',
                 msg(`Wrong auth method: ${ctx.method}`));
          ctx.accept();
        })).on('ready', mustCall(() => {
          conn.end();
        }));
      }));
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.