Guide to the Secure Configuration of Red Hat Enterprise Linux CoreOS 4
Rules, Groups, and Values defined within the XCCDF Benchmark
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System Settings
Contains rules that check correct system settings.Group -
Installing and Maintaining Software
The following sections contain information on security-relevant choices during the initial operating system installation process and the setup of s...Group -
Prefer to use a 64-bit Operating System when supported
Prefer installation of 64-bit operating systems when the CPU supports it.Rule Medium Severity -
System and Software Integrity
System and software integrity can be gained by installing antivirus, increasing system encryption strength with FIPS, verifying installed software,...Group -
Disable Prelinking
The prelinking feature changes binaries in an attempt to decrease their startup time. In order to disable it, change or add the following line insi...Rule Medium Severity -
Ensure there are no legacy + NIS entries in /etc/passwd
The <code>+</code> character in <code>/etc/passwd</code> file marks a place where entries from a network information service (NIS) should be direct...Rule Medium Severity -
Software Integrity Checking
Both the AIDE (Advanced Intrusion Detection Environment) software and the RPM package management system provide mechanisms for verifying the integr...Group -
Integrity Scan Notification Email Address
Specify the email address for designated personnel if baseline configurations are changed in an unauthorized manner.Value -
Verify Integrity with RPM
The RPM package management system includes the ability to verify the integrity of installed packages by comparing the installed files with informat...Group -
Verify and Correct File Permissions with RPM
The RPM package management system can check file access permissions of installed software packages, including many that are important to system sec...Rule High Severity -
Verify Integrity with AIDE
AIDE conducts integrity checks by comparing information about files with previously-gathered information. Ideally, the AIDE database is created imm...Group -
Install AIDE
Theaidepackage can be installed with the following command:$ sudo dnf install aide
Rule Medium Severity -
Build and Test AIDE Database
Run the following command to generate a new database: <pre>$ sudo /usr/sbin/aide --init</pre> By default, the database will be written to the fil...Rule Medium Severity -
Configure SSH to use System Crypto Policy
Crypto Policies provide a centralized control over crypto algorithms usage of many packages. SSH is supported by crypto policy, but the SSH configu...Rule Medium Severity -
Federal Information Processing Standard (FIPS)
The Federal Information Processing Standard (FIPS) is a computer security standard which is developed by the U.S. Government and industry working g...Group -
Install the dracut-fips Package
To enable FIPS, the system requires that the <code>dracut-fips</code> package be installed. The <code>dracut-fips</code> package can be installed w...Rule Medium Severity -
Enable Dracut FIPS Module
To enable FIPS mode, run the following command: <pre>fips-mode-setup --enable</pre> To enable FIPS, the system requires that the <code>fips</code> ...Rule High Severity -
Enable FIPS Mode
OpenShift has an installation-time flag that can enable FIPS mode for the cluster. The flag <pre>fips: true</pre> must be enabled at install time ...Rule High Severity -
Ensure '/etc/system-fips' exists
On a system where FIPS mode is enabled, <code>/etc/system-fips</code> must exist. To enable FIPS mode, run the following command: <pre>fips-mode-se...Rule High Severity -
Set kernel parameter 'crypto.fips_enabled' to 1
System running in FIPS mode is indicated by kernel parameter <code>'crypto.fips_enabled'</code>. This parameter should be set to <code>1</code> in ...Rule High Severity -
McAfee Endpoint Security for Linux (ENSL)
McAfee Endpoint Security for Linux (ENSL) is a suite of software applications used to monitor, detect, and defend computer networks and systems.Group -
McAfee Host-Based Intrusion Detection Software (HBSS)
McAfee Host-based Security System (HBSS) is a suite of software applications used to monitor, detect, and defend computer networks and systems.Group -
System Cryptographic Policies
Linux has the capability to centrally configure cryptographic polices. The command <code>update-crypto-policies</code> is used to set the policy ap...Group -
SSH client RekeyLimit - size
Specify the size component of the rekey limit. This limit signifies amount of data. After this amount of data is transferred through the connection...Value -
SSH client RekeyLimit - time
Specify the time component of the rekey limit. The session key is renegotiated after the defined amount of time passes. The number is followed by u...Value -
The system-provided crypto policies
Specify the crypto policy for the system.Value -
Configure BIND to use System Crypto Policy
Crypto Policies provide a centralized control over crypto algorithms usage of many packages. BIND is supported by crypto policy, but the BIND confi...Rule High Severity -
Configure System Cryptography Policy
To configure the system cryptography policy to use ciphers only from the <code><xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_system_...Rule High Severity -
Configure Kerberos to use System Crypto Policy
Crypto Policies provide a centralized control over crypto algorithms usage of many packages. Kerberos is supported by crypto policy, but it's confi...Rule High Severity -
Configure Libreswan to use System Crypto Policy
Crypto Policies provide a centralized control over crypto algorithms usage of many packages. Libreswan is supported by system crypto policy, but th...Rule High Severity -
Configure OpenSSL library to use System Crypto Policy
Crypto Policies provide a centralized control over crypto algorithms usage of many packages. OpenSSL is supported by crypto policy, but the OpenSSL...Rule Medium Severity -
Harden OpenSSL Crypto Policy
Crypto Policies are means of enforcing certain cryptographic settings for selected applications including OpenSSL. OpenSSL is by default configured...Rule Medium Severity -
Harden SSH client Crypto Policy
Crypto Policies are means of enforcing certain cryptographic settings for selected applications including OpenSSH client. To override the system wi...Rule Medium Severity -
Harden SSHD Crypto Policy
Crypto Policies are means of enforcing certain cryptographic settings for selected applications including OpenSSH server. The SSHD service is by de...Rule Medium Severity -
Operating System Vendor Support and Certification
The assurance of a vendor to provide operating system support and maintenance for their product is an important criterion to ensure product stabili...Group -
The Installed Operating System Is FIPS 140-2 Certified
To enable processing of sensitive information the operating system must provide certified cryptographic modules compliant with FIPS 140-2 standard.Rule High Severity -
Endpoint Protection Software
Endpoint protection security software that is not provided or supported by Red Hat can be installed to provide complementary or duplicative secur...Group -
Configure Backups of User Data
The operating system must conduct backups of user data contained in the operating system. The operating system provides utilities for automating ba...Rule Medium Severity -
McAfee Endpoint Security Software
In DoD environments, McAfee Host-based Security System (HBSS) and VirusScan Enterprise for Linux (VSEL) is required to be installed on all systems.Group -
The age of McAfee defintion file before requiring updating
Specify the amount of time (in seconds) before McAfee definition files need to be updated.Value -
Install the Host Intrusion Prevention System (HIPS) Module
Install the McAfee Host Intrusion Prevention System (HIPS) Module if it is absolutely necessary. If SELinux is enabled, do not install or enable th...Rule Medium Severity -
Disk Partitioning
To ensure separation and protection of data, there are top-level system directories which should be placed on their own physical partition or logic...Group -
Encrypt Partitions
Red Hat Enterprise Linux CoreOS 4 natively supports partition encryption through the Linux Unified Key Setup-on-disk-format (LUKS) technology. The ...Rule High Severity -
Ensure /home Located On Separate Partition
If user home directories will be stored locally, create a separate partition for <code>/home</code> at installation time (or migrate it later using...Rule Low Severity -
Ensure /srv Located On Separate Partition
If a file server (FTP, TFTP...) is hosted locally, create a separate partition for <code>/srv</code> at installation time (or migrate it later usin...Rule Unknown Severity -
Ensure /tmp Located On Separate Partition
The <code>/tmp</code> directory is a world-writable directory used for temporary file storage. Ensure it has its own partition or logical volume at...Rule Low Severity -
Ensure /var Located On Separate Partition
The <code>/var</code> directory is used by daemons and other system services to store frequently-changing data. Ensure that <code>/var</code> has i...Rule Low Severity -
Ensure Sudo Logfile Exists - sudo logfile
A custom log sudo file can be configured with the 'logfile' tag. This rule configures a sudo custom logfile at the default location suggested by CI...Rule Low Severity -
Ensure /var/log Located On Separate Partition
System logs are stored in the <code>/var/log</code> directory. <p> Partitioning Red Hat CoreOS is a Day 1 operation and cannot be changed afterward...Rule Low Severity -
Ensure /var/log/audit Located On Separate Partition
Audit logs are stored in the <code>/var/log/audit</code> directory. <p> Partitioning Red Hat CoreOS is a Day 1 operation and cannot be changed afte...Rule Low Severity
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