PCI-DSS v4.0 Control Baseline for Red Hat Enterprise Linux 9
Rules and Groups employed by this XCCDF Profile
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Ensure There Are No Accounts With Blank or Null Passwords
Check the "/etc/shadow" file for blank passwords with the following command: <pre>$ sudo awk -F: '!$2 {print $1}' /etc/shadow</pre> If the command ...Rule High Severity -
Restrict Root Logins
Direct root logins should be allowed only for emergency use. In normal situations, the administrator should access the system via a unique unprivil...Group -
Verify Only Root Has UID 0
If any account other than root has a UID of 0, this misconfiguration should be investigated and the accounts other than root should be removed or h...Rule High Severity -
Verify Root Has A Primary GID 0
Therootuser should have a primary group of 0.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 -
Ensure Authentication Required for Single User Mode
Single user mode is used for recovery when the system detects an issue during boot or by manual selection from the bootloader.Rule Medium Severity -
Direct root Logins Not Allowed
To further limit access to the <code>root</code> account, administrators can disable root logins at the console by editing the <code>/etc/securetty...Rule Medium Severity -
Ensure that System Accounts Are Locked
Some accounts are not associated with a human user of the system, and exist to perform some administrative functions. An attacker should not be abl...Rule Medium Severity -
Ensure that System Accounts Do Not Run a Shell Upon Login
Some accounts are not associated with a human user of the system, and exist to perform some administrative functions. Should an attacker be able to...Rule Medium Severity -
Restrict Virtual Console Root Logins
To restrict root logins through the (deprecated) virtual console devices, ensure lines of this form do not appear in <code>/etc/securetty</code>: <...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 -
Secure Session Configuration Files for Login Accounts
When a user logs into a Unix account, the system configures the user's session by reading a number of files. Many of these files are located in the...Group -
Set Interactive Session Timeout
Setting the <code>TMOUT</code> option in <code>/etc/profile</code> ensures that all user sessions will terminate based on inactivity. The value of ...Rule Medium Severity -
System Accounting with auditd
The audit service provides substantial capabilities for recording system activities. By default, the service audits about SELinux AVC denials and c...Group -
Install audispd-plugins Package
Theaudispd-pluginspackage can be installed with the following command:$ sudo dnf install audispd-plugins
Rule Medium Severity -
Ensure the audit Subsystem is Installed
The audit package should be installed.Rule Medium Severity -
Enable auditd Service
The <code>auditd</code> service is an essential userspace component of the Linux Auditing System, as it is responsible for writing audit records to...Rule Medium Severity -
Enable Auditing for Processes Which Start Prior to the Audit Daemon
To ensure all processes can be audited, even those which start prior to the audit daemon, add the argument <code>audit=1</code> to the default GRUB...Rule Low Severity -
Extend Audit Backlog Limit for the Audit Daemon
To improve the kernel capacity to queue all log events, even those which occurred prior to the audit daemon, add the argument <code>audit_backlog_l...Rule Low Severity -
Configure auditd Rules for Comprehensive Auditing
The <code>auditd</code> program can perform comprehensive monitoring of system activity. This section describes recommended configuration settings ...Group
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