NIST National Checklist Program Security Guide
Rules and Groups employed by this XCCDF Profile
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Ensure auditd Collects Information on the Use of Privileged Commands - chage
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - chsh
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - crontab
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - gpasswd
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - newgrp
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - pam_timestamp_check
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - passwd
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - postdrop
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - postqueue
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 -
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - su
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - sudo
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - sudoedit
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - umount
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - unix_chkpwd
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 -
Ensure auditd Collects Information on the Use of Privileged Commands - userhelper
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 -
Records Events that Modify Date and Time Information
Arbitrary changes to the system time can be used to obfuscate nefarious activities in log files, as well as to confuse network services that are hi...Group -
Record attempts to alter time through adjtimex
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 Time Through clock_settime
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 time through settimeofday
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 Time Through stime
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 the localtime File
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 -
Configure auditd Data Retention
The audit system writes data to <code>/var/log/audit/audit.log</code>. By default, <code>auditd</code> rotates 5 logs by size (6MB), retaining a ma...Group -
Configure auditd to use audispd's syslog plugin
To configure the <code>auditd</code> service to use the <code>syslog</code> plug-in of the <code>audispd</code> audit event multiplexor, set the <c...Rule Medium Severity -
Configure auditd mail_acct Action on Low Disk Space
The <code>auditd</code> service can be configured to send email to a designated account in certain situations. Add or correct the following line in...Rule Medium Severity -
Configure auditd admin_space_left Action on Low Disk Space
The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...Rule Medium Severity -
Configure auditd flush priority
The <code>auditd</code> service can be configured to synchronously write audit event data to disk. Add or correct the following line in <code>/etc/...Rule Medium Severity -
Configure auditd Max Log File Size
Determine the amount of audit data (in megabytes) which should be retained in each log file. Edit the file <code>/etc/audit/auditd.conf</code>. Add...Rule Medium Severity -
Configure auditd max_log_file_action Upon Reaching Maximum Log Size
The default action to take when the logs reach their maximum size is to rotate the log files, discarding the oldest one. To configure the action ta...Rule Medium Severity -
Configure auditd Number of Logs Retained
Determine how many log files <code>auditd</code> should retain when it rotates logs. Edit the file <code>/etc/audit/auditd.conf</code>. Add or modi...Rule Medium Severity -
Configure auditd space_left Action on Low Disk Space
The <code>auditd</code> service can be configured to take an action when disk space <i>starts</i> to run low. Edit the file <code>/etc/audit/auditd...Rule Medium Severity -
System Accounting with auditd
The <code>auditd</code> program can perform comprehensive monitoring of system activity. This section makes use of recommended configuration settin...Group -
Configure audit according to OSPP requirements
Configure audit to meet requirements for Operating System Protection Profile (OSPP) v4.2.1. Audit defines groups of rules in <code>/usr/share/doc/...Rule Medium Severity -
GRUB2 bootloader configuration
During the boot process, the boot loader is responsible for starting the execution of the kernel and passing options to it. The boot loader allows ...Group -
Disable vsyscalls
To disable use of virtual syscalls, add the argument <code>vsyscall=none</code> to the default GRUB 2 command line for the Linux operating system. ...Rule Medium Severity -
Non-UEFI GRUB2 bootloader configuration
Non-UEFI GRUB2 bootloader configurationGroup -
Verify /boot/grub2/grub.cfg Group Ownership
The file <code>/boot/grub2/grub.cfg</code> should be group-owned by the <code>root</code> group to prevent destruction or modification of the file....Rule Medium Severity -
Verify /boot/grub2/grub.cfg User Ownership
The file <code>/boot/grub2/grub.cfg</code> should be owned by the <code>root</code> user to prevent destruction or modification of the file. To pr...Rule Medium Severity -
Verify /boot/grub2/grub.cfg Permissions
File permissions for <code>/boot/grub2/grub.cfg</code> should be set to 600. To properly set the permissions of <code>/boot/grub2/grub.cfg</code>,...Rule Medium Severity -
Set Boot Loader Password in grub2
The grub2 boot loader should have a superuser account and password protection enabled to protect boot-time settings. <br><br> Since plaintext passw...Rule High Severity -
UEFI GRUB2 bootloader configuration
UEFI GRUB2 bootloader configurationGroup -
Set the UEFI Boot Loader Password
The grub2 boot loader should have a superuser account and password protection enabled to protect boot-time settings. <br><br> Since plaintext passw...Rule High Severity -
Configure Syslog
The syslog service has been the default Unix logging mechanism for many years. It has a number of downsides, including inconsistent log format, lac...Group -
Ensure Proper Configuration of Log Files
The file <code>/etc/rsyslog.conf</code> controls where log message are written. These are controlled by lines called <i>rules</i>, which consist of...Group -
Ensure cron Is Logging To Rsyslog
Cron logging must be implemented to spot intrusions or trace cron job status. If <code>cron</code> is not logging to <code>rsyslog</code>, it can b...Rule Medium Severity -
Configure rsyslogd to Accept Remote Messages If Acting as a Log Server
By default, <code>rsyslog</code> does not listen over the network for log messages. If needed, modules can be enabled to allow the rsyslog daemon t...Group -
Ensure rsyslog Does Not Accept Remote Messages Unless Acting As Log Server
The <code>rsyslog</code> daemon should not accept remote messages unless the system acts as a log server. To ensure that it is not listening on the...Rule Medium Severity -
Rsyslog Logs Sent To Remote Host
If system logs are to be useful in detecting malicious activities, it is necessary to send logs to a remote server. An intruder who has compromised...Group -
Ensure Logs Sent To Remote Host
To configure rsyslog to send logs to a remote log server, open <code>/etc/rsyslog.conf</code> and read and understand the last section of the file,...Rule Medium Severity -
Network Configuration and Firewalls
Most systems must be connected to a network of some sort, and this brings with it the substantial risk of network attack. This section discusses th...Group
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