CIS Red Hat Enterprise Linux 7 Benchmark for Level 2 - Server
Rules and Groups employed by this XCCDF Profile
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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 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 -
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 -
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-libs package as a part of audit Subsystem is Installed
The audit-libs package should be installed.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 -
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 -
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 -
System Audit Logs Must Have Mode 0750 or Less Permissive
If <code>log_group</code> in <code>/etc/audit/auditd.conf</code> is set to a group other than the <code>root</code> group account, change the mode...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 -
Audit Configuration Files Permissions are 640 or More Restrictive
All audit configuration files permissions must be 640 or more restrictive.chmod 0640 /etc/audit/audit*.{rules,conf} /etc/audit/rules.d/*Rule Medium Severity -
System Audit Logs Must Have Mode 0640 or Less Permissive
Determine where the audit logs are stored with the following command: <pre>$ sudo grep -iw log_file /etc/audit/auditd.conf log_file = /var/log/aud...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls
At a minimum, the audit system should collect file permission changes for all users and root. Note that the "-F arch=b32" lines should be present e...Group -
Record Events that Modify the System's Discretionary Access Controls - chmod
At a minimum, the audit system should collect file permission changes for all users and root. If the <code>auditd</code> daemon is configured to us...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - chown
At a minimum, the audit system should collect file permission changes for all users and root. If the <code>auditd</code> daemon is configured to us...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - fchmod
At a minimum, the audit system should collect file permission changes for all users and root. If the <code>auditd</code> daemon is configured to us...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - fchmodat
At a minimum, the audit system should collect file permission changes for all users and root. If the <code>auditd</code> daemon is configured to us...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - fchown
At a minimum, the audit system should collect file permission changes for all users and root. If the <code>auditd</code> daemon is configured to us...Rule Medium Severity -
Record Events that Modify the System's Discretionary Access Controls - fchownat
At a minimum, the audit system should collect file permission changes for all users and root. If the <code>auditd</code> daemon is configured to us...Rule Medium Severity
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