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Guide to the Secure Configuration of Amazon Linux 2023

Rules, Groups, and Values defined within the XCCDF Benchmark

  • DNS Server

    Most organizations have an operational need to run at least one nameserver. However, there are many common attacks involving DNS server software, and this server software should be disabled on any ...
    Group
  • Verify Ownership on SSH Server Private *_key Key Files

    SSH server private keys, files that match the /etc/ssh/*_key glob, must be owned by root user.
    Rule Medium Severity
  • Verify Ownership on SSH Server Public *.pub Key Files

    SSH server public keys, files that match the /etc/ssh/*.pub glob, must be owned by root user.
    Rule Medium Severity
  • Verify Group Who Owns Backup gshadow File

    To properly set the group owner of /etc/gshadow-, run the command:
    $ sudo chgrp root /etc/gshadow-
    Rule Medium Severity
  • Verify Group Who Owns Backup passwd File

    To properly set the group owner of /etc/passwd-, run the command:
    $ sudo chgrp root /etc/passwd-
    Rule Medium Severity
  • Verify permissions on System Login Banner for Remote Connections

    To properly set the permissions of /etc/issue.net, run the command:
    $ sudo chmod 0644 /etc/issue.net
    Rule Medium Severity
  • Verify permissions on Message of the Day Banner

    To properly set the permissions of /etc/motd, run the command:
    $ sudo chmod 0644 /etc/motd
    Rule Medium Severity
  • Protect Accounts by Restricting Password-Based Login

    Conventionally, Unix shell accounts are accessed by providing a username and password to a login program, which tests these values for correctness using the <code>/etc/passwd</code> and <code>/etc/...
    Group
  • Ensure All Accounts on the System Have Unique User IDs

    Change user IDs (UIDs), or delete accounts, so each has a unique name.
    Rule Medium Severity
  • Ensure All Groups on the System Have Unique Group ID

    Change the group name or delete groups, so each has a unique id.
    Rule Medium Severity

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