Guide to the Secure Configuration of Red Hat Enterprise Linux 9
Rules, Groups, and Values defined within the XCCDF Benchmark
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Removable Partition
This value is used by the checks mount_option_nodev_removable_partitions, mount_option_nodev_removable_partitions, and mount_option_nodev_removable...Value -
Add nosuid Option to /boot/efi
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/boot/efi</code>. The SUID and SGID permissions s...Rule Medium Severity -
Add noauto Option to /boot
The <code>noauto</code> mount option is used to prevent automatic mounting of th <code>/boot</code> partition. Add the <code>noauto</code> option ...Rule Medium Severity -
dhcpc_exec_iptables SELinux Boolean
default - Default SELinux boolean setting.
on - SELinux boolean is enabled.
off - SELinux boolean is disabled.Value -
Add nodev Option to /boot
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/boot</code>. Legitimate character and block de...Rule Medium Severity -
Add noexec Option to /boot
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/boot</code>. Add the <code>noexec</code> op...Rule Medium Severity -
Add nosuid Option to /boot
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/boot</code>. The SUID and SGID permissions shoul...Rule Medium Severity -
Add nodev Option to /dev/shm
The <code>nodev</code> mount option can be used to prevent creation of device files in <code>/dev/shm</code>. Legitimate character and block device...Rule Medium Severity -
Add noexec Option to /dev/shm
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/dev/shm</code>. It can be dangerous to allow...Rule Medium Severity -
Add nosuid Option to /dev/shm
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/dev/shm</code>. The SUID and SGID permissions s...Rule Medium Severity -
Add grpquota Option to /home
The <code>grpquota</code> mount option allows for the filesystem to have disk quotas configured. Add the <code>grpquota</code> option to the fourth...Rule Medium Severity -
Add nodev Option to /home
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/home</code>. Legitimate character and block de...Rule Unknown Severity -
Add noexec Option to /home
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/home</code>. Add the <code>noexec</code> opt...Rule Medium Severity -
Add nosuid Option to /home
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/home</code>. The SUID and SGID permissions shoul...Rule Medium Severity -
Add usrquota Option to /home
The <code>usrquota</code> mount option allows for the filesystem to have disk quotas configured. Add the <code>usrquota</code> option to the fourth...Rule Medium Severity -
Add nodev Option to Non-Root Local Partitions
The <code>nodev</code> mount option prevents files from being interpreted as character or block devices. Legitimate character and block devices sho...Rule Medium Severity -
Add nodev Option to Removable Media Partitions
The <code>nodev</code> mount option prevents files from being interpreted as character or block devices. Legitimate character and block devices sho...Rule Medium Severity -
Add noexec Option to Removable Media Partitions
The <code>noexec</code> mount option prevents the direct execution of binaries on the mounted filesystem. Preventing the direct execution of binari...Rule Medium Severity -
Add nosuid Option to Removable Media Partitions
The <code>nosuid</code> mount option prevents set-user-identifier (SUID) and set-group-identifier (SGID) permissions from taking effect. These perm...Rule Medium Severity -
Add nosuid Option to /opt
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/opt</code>. The SUID and SGID permissions should...Rule Medium Severity -
Add hidepid Option to /proc
The <code>hidepid</code> mount option is applicable to <code>/proc</code> and is used to control who can access the information in <code>/proc/[pid...Rule Low Severity -
Add nosuid Option to /srv
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/srv</code>. The SUID and SGID permissions should...Rule Medium Severity -
Add nodev Option to /tmp
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/tmp</code>. Legitimate character and block dev...Rule Medium Severity -
Add noexec Option to /tmp
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/tmp</code>. Add the <code>noexec</code> opti...Rule Medium Severity -
dhcpd_use_ldap SELinux Boolean
default - Default SELinux boolean setting.
on - SELinux boolean is enabled.
off - SELinux boolean is disabled.Value -
Add nosuid Option to /tmp
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/tmp</code>. The SUID and SGID permissions should...Rule Medium Severity -
Add nodev Option to /var/log/audit
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/var/log/audit</code>. Legitimate character and...Rule Medium Severity -
Add noexec Option to /var/log/audit
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/var/log/audit</code>. Add the <code>noexec</...Rule Medium Severity -
Add nosuid Option to /var/log/audit
The <code>nosuid</code> mount option can be used to prevent execution of setuid programs in <code>/var/log/audit</code>. The SUID and SGID permissi...Rule Medium Severity -
Add nodev Option to /var/log
The <code>nodev</code> mount option can be used to prevent device files from being created in <code>/var/log</code>. Legitimate character and block...Rule Medium Severity -
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 noexec Option to /var
The <code>noexec</code> mount option can be used to prevent binaries from being executed out of <code>/var</code>. Add the <code>noexec</code> opti...Rule Medium Severity -
Bind Mount /var/tmp To /tmp
The <code>/var/tmp</code> directory is a world-writable directory. Bind-mount it to <code>/tmp</code> in order to consolidate temporary storage int...Rule Unknown 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 -
Verify Permissions on Important Files and Directories Are Configured in /etc/permissions.local
Permissions for many files on a system must be set restrictively to ensure sensitive information is properly protected. This section discusses the ...Group -
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 -
kernel.unprivileged_bpf_disabled
Prevent unprivileged processes from using the bpf() syscall.Value -
Disable the uvcvideo module
If the device contains a camera it should be covered or disabled when not in use.Rule Medium 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 -
Disable storing core dumps
The <code>kernel.core_pattern</code> option specifies the core dumpfile pattern name. It can be set to an empty string. In this case, the kernel be...Rule Medium Severity -
Configure file name of core dumps
To set the runtime status of the <code>kernel.core_uses_pid</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.core_u...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 -
Disable loading and unloading of kernel modules
To set the runtime status of the <code>kernel.modules_disabled</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.mod...Rule Medium Severity -
Kernel panic on oops
To set the runtime status of the <code>kernel.panic_on_oops</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w kernel.panic_...Rule Medium Severity -
Limit CPU consumption of the Perf system
To set the runtime status of the <code>kernel.perf_cpu_time_max_percent</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w k...Rule Medium Severity
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