Guide to the Secure Configuration of Red Hat Enterprise Linux 10
Rules, Groups, and Values defined within the XCCDF Benchmark
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Verify Permissions on crontab
To properly set the permissions of/etc/crontab, run the command:$ sudo chmod 0600 /etc/crontab
Rule Medium Severity -
Ensure LDAP client is not installed
The Lightweight Directory Access Protocol (LDAP) is a service that provides a method for looking up information from a central database. The <code>...Rule Low Severity -
Disable storing core dumps
To set the runtime status of the <code>kernel.core_pattern</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.core_pa...Rule Medium Severity -
Restrict Access to Kernel Message Buffer
To set the runtime status of the <code>kernel.dmesg_restrict</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.dmesg...Rule Low Severity -
Disable Kernel Image Loading
To set the runtime status of the <code>kernel.kexec_load_disabled</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel....Rule Medium Severity -
Verify User Who Owns /etc/selinux Directory
To properly set the owner of/etc/selinux, run the command:$ sudo chown root /etc/selinux
Rule Medium Severity -
Verify Permissions On /etc/selinux Directory
To properly set the permissions of/etc/selinux, run the command:$ sudo chmod 0755 /etc/selinux
Rule Medium Severity -
Verify Group Who Owns /etc/sestatus.conf File
To properly set the group owner of/etc/sestatus.conf, run the command:$ sudo chgrp root /etc/sestatus.conf
Rule Medium Severity -
Verify User Who Owns /etc/sestatus.conf File
To properly set the owner of/etc/sestatus.conf, run the command:$ sudo chown root /etc/sestatus.conf
Rule Medium Severity -
Verify Permissions On /etc/sestatus.conf File
To properly set the permissions of/etc/sestatus.conf, run the command:$ sudo chmod 0644 /etc/sestatus.conf
Rule Medium Severity -
Ensure SELinux Not Disabled in /etc/default/grub
SELinux can be disabled at boot time by an argument in <code>/etc/default/grub</code>. Remove any instances of <code>selinux=0</code> from the kern...Rule Medium Severity -
Appropriate Action Must be Setup When the Internal Audit Event Queue is Full
The audit system should have an action setup in the event the internal event queue becomes full. To setup an overflow action edit <code>/etc/audit/...Rule Medium Severity -
Write Audit Logs to the Disk
To configure Audit daemon to write Audit logs to the disk, set <code>write_logs</code> to <code>yes</code> in <code>/etc/audit/auditd.conf</code>. ...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 auditing of unsuccessful file accesses
Ensure that unsuccessful attempts to access a file are audited. The following rules configure audit as described above: <pre>## Unsuccessful file ...Rule Medium Severity -
Configure the polyinstantiation_enabled SELinux Boolean
By default, the SELinux boolean <code>polyinstantiation_enabled</code> is disabled. This setting should be configured to <xccdf-1.2:sub idref="xccd...Rule Medium Severity -
Disable the selinuxuser_execheap SELinux Boolean
By default, the SELinux boolean <code>selinuxuser_execheap</code> is disabled. When enabled this boolean is enabled it allows selinuxusers to execu...Rule Medium Severity -
Enable the selinuxuser_execmod SELinux Boolean
By default, the SELinux boolean <code>selinuxuser_execmod</code> is enabled. If this setting is disabled, it should be enabled. To enable the <cod...Rule Medium Severity -
Disable the selinuxuser_execstack SELinux Boolean
By default, the SELinux boolean <code>selinuxuser_execstack</code> is enabled. This setting should be disabled as unconfined executables should not...Rule Medium Severity -
Verify Group Who Owns cron.daily
To properly set the group owner of/etc/cron.daily, run the command:$ sudo chgrp root /etc/cron.daily
Rule Medium Severity -
Verify Group Who Owns cron.deny
To properly set the group owner of/etc/cron.deny, run the command:$ sudo chgrp root /etc/cron.deny
Rule Medium Severity -
Verify Group Who Owns cron.hourly
To properly set the group owner of/etc/cron.hourly, run the command:$ sudo chgrp root /etc/cron.hourly
Rule Medium Severity -
Verify Group Who Owns cron.monthly
To properly set the group owner of/etc/cron.monthly, run the command:$ sudo chgrp root /etc/cron.monthly
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 -
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 -
Ensure /var/log/audit Located On Separate Partition
Audit logs are stored in the <code>/var/log/audit</code> directory. Ensure that <code>/var/log/audit</code> has its own partition or logical volum...Rule Low Severity -
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 -
Audit Tools Must Be Owned by Root
Red Hat Enterprise Linux 10 systems providing tools to interface with audit information will leverage user permissions and roles identifying the us...Rule Medium Severity -
Audit Tools Must Have a Mode of 0755 or Less Permissive
Red Hat Enterprise Linux 10 systems providing tools to interface with audit information will leverage user permissions and roles identifying the us...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 -
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 -
Enable FIPS Mode
To enable FIPS mode, run the following command: <pre>fips-mode-setup --enable</pre> <br> The <code>fips-mode-setup</code> command will co...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 -
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 -
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 -
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 -
Install crypto-policies package
Thecrypto-policiespackage can be installed with the following command:$ sudo dnf install crypto-policies
Rule Medium 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 TLS Encryption
Crypto Policies are means of enforcing certain cryptographic settings for selected applications including OpenSSL. OpenSSL is by default configured...Rule Medium 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 -
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 -
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 Vendor Supported
The installed operating system must be maintained by a vendor. Red Hat Enterprise Linux is supported by Red Hat, Inc. As the Red Hat Enterprise Li...Rule High Severity
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