Nutanix OS must be configured to remove sendmail.

It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors.

Operating systems can provide a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).

Examples of nonessential capabilities include, but are not limited to, games, software packages, tools, and demonstration software, not related to requirements or providing a wide array of functionality not required for every mission, but which cannot be disabled.

For AHV, this requirement is Not Applicable.

For AOS, Prism Central, and Files, verify the OS is configured to disable nonessential capabilities using the following command.

$ sudo yum list installed sendmail

If the sendmail package is installed, this is a finding.

For AOS, Prism Central, and Files, remove any finding identified using the following command.

$ sudo yum remove sendmail