DISA STIG with GUI for Red Hat Enterprise Linux 9
Rules and Groups employed by this XCCDF Profile
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Add noexec Option to /var/log
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/var/log</code>. Add the <code>noexec</code> ...Rule Medium Severity -
Add nosuid Option to /var/log
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/var/log</code>. The SUID and SGID permissions sh...Rule Medium Severity -
Add nodev Option to /var
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/var</code>. Legitimate character and block dev...Rule Medium Severity -
Add nodev Option to /var/tmp
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/var/tmp</code>. Legitimate character and block...Rule Medium Severity -
Add noexec Option to /var/tmp
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/var/tmp</code>. Add the <code>noexec</code> ...Rule Medium Severity -
Add nosuid Option to /var/tmp
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/var/tmp</code>. The SUID and SGID permissions sh...Rule Medium Severity -
Restrict Programs from Dangerous Execution Patterns
The recommendations in this section are designed to ensure that the system's features to protect against potentially dangerous program execution ar...Group -
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 -
Disallow kernel profiling by unprivileged users
To set the runtime status of the <code>kernel.perf_event_paranoid</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel....Rule Low Severity -
Disable Access to Network bpf() Syscall From Unprivileged Processes
To set the runtime status of the <code>kernel.unprivileged_bpf_disabled</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w k...Rule Medium Severity -
Restrict usage of ptrace to descendant processes
To set the runtime status of the <code>kernel.yama.ptrace_scope</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.ya...Rule Medium Severity -
Harden the operation of the BPF just-in-time compiler
To set the runtime status of the <code>net.core.bpf_jit_harden</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.core.b...Rule Medium Severity -
Disable the use of user namespaces
To set the runtime status of the <code>user.max_user_namespaces</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w user.max_...Rule Medium Severity -
Disable Core Dumps
A core dump file is the memory image of an executable program when it was terminated by the operating system due to errant behavior. In most cases,...Group -
Disable acquiring, saving, and processing core dumps
The <code>systemd-coredump.socket</code> unit is a socket activation of the <code>systemd-coredump@.service</code> which processes core dumps. By m...Rule Medium Severity -
Disable core dump backtraces
The <code>ProcessSizeMax</code> option in <code>[Coredump]</code> section of <code>/etc/systemd/coredump.conf</code> specifies the maximum size in ...Rule Medium Severity -
Disable storing core dump
The <code>Storage</code> option in <code>[Coredump]</code> sectionof <code>/etc/systemd/coredump.conf</code> can be set to <code>none</code> to dis...Rule Medium Severity -
Disable Core Dumps for All Users
To disable core dumps for all users, add the following line to <code>/etc/security/limits.conf</code>, or to a file within the <code>/etc/security/...Rule Medium Severity -
Enable ExecShield
ExecShield describes kernel features that provide protection against exploitation of memory corruption errors such as buffer overflows. These featu...Group -
Enable ExecShield via sysctl
By default on Red Hat Enterprise Linux 9 64-bit systems, ExecShield is enabled and can only be disabled if the hardware does not support ExecShield...Rule Medium Severity -
Restrict Exposed Kernel Pointer Addresses Access
To set the runtime status of the <code>kernel.kptr_restrict</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.kptr_r...Rule Medium Severity -
Enable Randomized Layout of Virtual Address Space
To set the runtime status of the <code>kernel.randomize_va_space</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.r...Rule Medium Severity -
Memory Poisoning
Memory Poisoning consists of writing a special value to uninitialized or freed memory. Poisoning can be used as a mechanism to prevent leak of info...Group -
Enable page allocator poisoning
To enable poisoning of free pages, add the argument <code>page_poison=1</code> to the default GRUB 2 command line for the Linux operating system. T...Rule Medium Severity -
Enable SLUB/SLAB allocator poisoning
To enable poisoning of SLUB/SLAB objects, add the argument <code>slub_debug=<xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_slub_debug...Rule Medium Severity -
SELinux
SELinux is a feature of the Linux kernel which can be used to guard against misconfigured or compromised programs. SELinux enforces the idea that p...Group -
Install policycoreutils-python-utils package
The <code>policycoreutils-python-utils</code> package can be installed with the following command: <pre> $ sudo dnf install policycoreutils-python-...Rule Medium Severity -
Install policycoreutils Package
Thepolicycoreutilspackage can be installed with the following command:$ sudo dnf install policycoreutils
Rule Low Severity -
Ensure No Device Files are Unlabeled by SELinux
Device files, which are used for communication with important system resources, should be labeled with proper SELinux types. If any device files ca...Rule Medium Severity -
Configure SELinux Policy
The SELinux <code>targeted</code> policy is appropriate for general-purpose desktops and servers, as well as systems in many other roles. To config...Rule Medium Severity -
Ensure SELinux State is Enforcing
The SELinux state should be set to <code><xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_selinux_state" use="legacy"></xccdf-1.2:sub><...Rule High Severity -
Services
The best protection against vulnerable software is running less software. This section describes how to review the software which Red Hat Enterpris...Group -
Base Services
This section addresses the base services that are installed on a Red Hat Enterprise Linux 9 default installation which are not covered in other sec...Group -
Disable KDump Kernel Crash Analyzer (kdump)
The <code>kdump</code> service provides a kernel crash dump analyzer. It uses the <code>kexec</code> system call to boot a secondary kernel ("captu...Rule Medium Severity -
Cron and At Daemons
The cron and at services are used to allow commands to be executed at a later time. The cron service is required by almost all systems to perform n...Group -
Verify Group Who Owns cron.d
To properly set the group owner of/etc/cron.d, run the command:$ sudo chgrp root /etc/cron.d
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.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 -
Verify Group Who Owns cron.weekly
To properly set the group owner of/etc/cron.weekly, run the command:$ sudo chgrp root /etc/cron.weekly
Rule Medium Severity -
Verify Group Who Owns Crontab
To properly set the group owner of/etc/crontab, run the command:$ sudo chgrp root /etc/crontab
Rule Medium Severity -
Verify Owner on cron.d
To properly set the owner of/etc/cron.d, run the command:$ sudo chown root /etc/cron.d
Rule Medium Severity -
Verify Owner on cron.daily
To properly set the owner of/etc/cron.daily, run the command:$ sudo chown root /etc/cron.daily
Rule Medium Severity -
Verify Owner on cron.hourly
To properly set the owner of/etc/cron.hourly, run the command:$ sudo chown root /etc/cron.hourly
Rule Medium Severity -
Verify Owner on cron.monthly
To properly set the owner of/etc/cron.monthly, run the command:$ sudo chown root /etc/cron.monthly
Rule Medium Severity -
Verify Owner on cron.weekly
To properly set the owner of/etc/cron.weekly, run the command:$ sudo chown root /etc/cron.weekly
Rule Medium Severity -
Verify Owner on crontab
To properly set the owner of/etc/crontab, run the command:$ sudo chown root /etc/crontab
Rule Medium Severity -
Verify Permissions on cron.d
To properly set the permissions of/etc/cron.d, run the command:$ sudo chmod 0700 /etc/cron.d
Rule Medium Severity
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