Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide (STIG) V1R9
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 - chfn
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 - fdisk
Configure the operating system to audit the execution of the partition management program "fdisk".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 - 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 -
Ensure auditd Collects Information on the Use of Privileged Commands - modprobe
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 - mount
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 -
Record Any Attempts to Run ssh-agent
At a minimum, the audit system should collect any execution attempt of the <code>ssh-agent</code> command for all users and root. If the <code>audi...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_update
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 - usermod
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 -
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 audispd Plugin To Send Logs To Remote Server
Configure the audispd plugin to off-load audit records onto a different system or media from the system being audited. First, set the <code>active...Rule Medium Severity -
Configure a Sufficiently Large Partition for Audit Logs
The Ubuntu 20.04 operating system must allocate audit record storage capacity to store at least one weeks worth of audit records when audit records...Rule Medium Severity -
Configure auditd Disk Full Action when Disk Space Is Full
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 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 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 -
Configure auditd space_left 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 -
Offload audit Logs to External Media
The operating system must have a crontab script running weekly to offload audit events of standalone systems.Rule Medium Severity -
AppArmor
Many security vulnerabilities result from bugs in trusted programs. A trusted program runs with privileges that attackers want to possess. The prog...Group -
Ensure AppArmor is installed
AppArmor provide Mandatory Access Controls.Rule Medium Severity -
Ensure AppArmor is Active and Configured
Verify that the Apparmor tool is configured to control whitelisted applications and user home directory access control.<br><br> The <code>apparmor...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 -
Non-UEFI GRUB2 bootloader configuration
Non-UEFI GRUB2 bootloader configurationGroup -
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 -
Enable rsyslog Service
The <code>rsyslog</code> service provides syslog-style logging by default on Ubuntu 20.04. The <code>rsyslog</code> service can be enabled with th...Rule Medium Severity -
Ensure real-time clock is set to UTC
Ensure that the system real-time clock (RTC) is set to Coordinated Universal Time (UTC).Rule High Severity -
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 remote access methods are monitored in Rsyslog
Logging of remote access methods must be implemented to help identify cyber attacks and ensure ongoing compliance with remote access policies are b...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 -
Kernel Parameters Which Affect Networking
The <code>sysctl</code> utility is used to set parameters which affect the operation of the Linux kernel. Kernel parameters which affect networking...Group -
Network Related Kernel Runtime Parameters for Hosts and Routers
Certain kernel parameters should be set for systems which are acting as either hosts or routers to improve the system's ability defend against cert...Group -
Enable Kernel Parameter to Use TCP Syncookies on Network Interfaces
To set the runtime status of the <code>net.ipv4.tcp_syncookies</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv4.t...Rule Medium Severity -
Uncomplicated Firewall (ufw)
The Linux kernel in Ubuntu provides a packet filtering system called netfilter, and the traditional interface for manipulating netfilter are the ip...Group -
Install ufw Package
Theufw
package can be installed with the following command:$ apt-get install ufw
Rule Medium Severity -
Verify ufw Enabled
Theufw
service can be enabled with the following command:$ sudo systemctl enable ufw.service
Rule Medium Severity -
Only Allow Authorized Network Services in ufw
Check the firewall configuration for any unnecessary or prohibited functions, ports, protocols, and/or services by running the following command: <...Rule Medium Severity -
ufw Must rate-limit network interfaces
The operating system must configure the uncomplicated firewall to rate-limit impacted network interfaces.Rule Medium Severity
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