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Guide to the Secure Configuration of Ubuntu 20.04

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Prevent Login to Accounts With Empty Password

    If an account is configured for password authentication but does not have an assigned password, it may be possible to log into the account without ...
    Rule High Severity
  • Ensure the Group Used by pam_wheel.so Module Exists on System and is Empty

    Ensure that the group <code><xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_pam_wheel_group_for_su" use="legacy"></xccdf-1.2:sub></cod...
    Rule Medium Severity
  • Enforce Usage of pam_wheel with Group Parameter for su Authentication

    To ensure that only users who are members of the group set in the <code>group</code> option of <code>pam_wheel.so</code> module can run commands wi...
    Rule Medium Severity
  • Ensure auditd Collects Information on Kernel Module Unloading - delete_module

    To capture kernel module unloading events, use following line, setting ARCH to either b32 for 32-bit system, or having two lines for both b32 and b...
    Rule Medium Severity
  • Ensure auditd Collects Information on Kernel Module Loading and Unloading - finit_module

    If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default),...
    Rule Medium Severity
  • Ensure auditd Collects Information on Kernel Module Loading - init_module

    To capture kernel module loading events, use following line, setting ARCH to either b32 for 32-bit system, or having two lines for both b32 and b64...
    Rule Medium Severity
  • Record Attempts to Alter Logon and Logout Events

    The audit system already collects login information for all users and root. If the <code>auditd</code> daemon is configured to use the <code>augenr...
    Group
  • Ensure auditd Collects Information on the Use of Privileged Commands - kmod

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
  • Set SSH Client Alive Count Max to zero

    The SSH server sends at most <code>ClientAliveCountMax</code> messages during a SSH session and waits for a response from the SSH client. The optio...
    Rule Medium Severity
  • Ensure auditd Collects Information on the Use of Privileged Commands - ssh-keysign

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity

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