CIS Red Hat Enterprise Linux 8 Benchmark for Level 2 - Server
Rules and Groups employed by this XCCDF Profile
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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 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 -
Verify No .forward Files Exist
The.forwardfile specifies an email address to forward the user's mail to.Rule Medium 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 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 -
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 -
User Initialization Files Must Be Group-Owned By The Primary Group
Change the group owner of interactive users files to the group found in <pre>/etc/passwd</pre> for the user. To change the group owner of a local i...Rule Medium Severity -
User Initialization Files Must Be Owned By the Primary User
Set the owner of the user initialization files for interactive users to the primary owner with the following command: <pre>$ sudo chown <i>USER</i>...Rule Medium Severity -
All Interactive Users Home Directories Must Exist
Create home directories to all local interactive users that currently do not have a home directory assigned. Use the following commands to create t...Rule Medium Severity -
Ensure users' .netrc Files are not group or world accessible
While the system administrator can establish secure permissions for users' .netrc files, the users can easily override these. This rule ensures ev...Rule Medium Severity -
All Interactive User Home Directories Must Be Owned By The Primary User
Change the owner of interactive users home directories to that correct owner. To change the owner of a interactive users home directory, use the fo...Rule Medium Severity -
Ensure All User Initialization Files Have Mode 0740 Or Less Permissive
Set the mode of the user initialization files to <code>0740</code> with the following command: <pre>$ sudo chmod 0740 /home/<i>USER</i>/.<i>INIT_FI...Rule Medium Severity -
All Interactive User Home Directories Must Have mode 0750 Or Less Permissive
Change the mode of interactive users home directories to <code>0750</code>. To change the mode of interactive users home directory, use the followi...Rule Medium Severity -
Ensure that No Dangerous Directories Exist in Root's Path
The active path of the root account can be obtained by starting a new root shell and running: <pre># echo $PATH</pre> This will produce a colon-sep...Group -
Ensure that Root's Path Does Not Include World or Group-Writable Directories
For each element in root's path, run:# ls -ld DIR
and ensure that write permissions are disabled for group and other.Rule Medium Severity -
Ensure that Root's Path Does Not Include Relative Paths or Null Directories
Ensure that none of the directories in root's path is equal to a single <code>.</code> character, or that it contains any instances that lead to re...Rule Unknown Severity -
Ensure that Users Have Sensible Umask Values
The umask setting controls the default permissions for the creation of new files. With a default <code>umask</code> setting of 077, files and direc...Group -
Ensure the Default Bash Umask is Set Correctly
To ensure the default umask for users of the Bash shell is set properly, add or correct the <code>umask</code> setting in <code>/etc/bashrc</code> ...Rule Medium Severity -
Ensure the Default Umask is Set Correctly in login.defs
To ensure the default umask controlled by <code>/etc/login.defs</code> is set properly, add or correct the <code>UMASK</code> setting in <code>/etc...Rule Medium Severity -
Ensure the Default Umask is Set Correctly in /etc/profile
To ensure the default umask controlled by <code>/etc/profile</code> is set properly, add or correct the <code>umask</code> setting in <code>/etc/pr...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 -
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 -
Make the auditd Configuration Immutable
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 -
Record Events that Modify the System's Mandatory Access Controls
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 -
Record Events that Modify the System's Mandatory Access Controls in usr/share
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 Exporting to Media (successful)
At a minimum, the audit system should collect media exportation events for all users and root. If the <code>auditd</code> daemon is configured to u...Rule Medium Severity -
Record Events that Modify the System's Network Environment
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 -
Record Attempts to Alter Process and Session Initiation Information
The audit system already collects process information for all users and root. If the <code>auditd</code> daemon is configured to use the <code>auge...Rule Medium Severity -
Record Events When Executables Are Run As Another User
Verify the system generates an audit record when actions are run as another user. sudo provides users with temporary elevated privileges to perform...Rule Medium Severity -
Ensure auditd Collects System Administrator Actions
At a minimum, the audit system should collect administrator actions for all users and root. If the <code>auditd</code> daemon is configured to use ...Rule Medium Severity -
Record Events that Modify User/Group Information - /etc/group
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 -
Record Events that Modify User/Group Information - /etc/gshadow
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 -
Record Events that Modify User/Group Information - /etc/security/opasswd
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 -
Record Events that Modify User/Group Information - /etc/passwd
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 -
Record Events that Modify User/Group Information - /etc/shadow
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 -
Record Attempts to perform maintenance activities
The Red Hat Enterprise Linux 8 operating system must generate audit records for privileged activities, nonlocal maintenance, diagnostic sessions an...Rule Medium Severity -
System Audit Logs Must Have Mode 0750 or Less Permissive
Verify the audit log directories have a mode of "0700" or less permissive by first determining where the audit logs are stored with the following ...Rule Medium Severity -
System Audit Logs Must Be Group Owned By Root
All audit logs must be group owned by root user. The path for audit log can be configured via <code>log_file</code> parameter in <pre>/etc/audit/au...Rule Medium Severity -
Audit Configuration Files Must Be Owned By Group root
All audit configuration files must be owned by group root.chown :root /etc/audit/audit*.{rules,conf} /etc/audit/rules.d/*Rule Medium Severity -
Audit Configuration Files Must Be Owned By Root
All audit configuration files must be owned by root user. To properly set the owner of <code>/etc/audit/</code>, run the command: <pre>$ sudo chow...Rule Medium Severity
Node 2
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