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 File Hashes with RPM
Without cryptographic integrity protections, system executables and files can be altered by unauthorized users without detection. The RPM package m...Rule High Severity -
Verify and Correct Ownership with RPM
The RPM package management system can check file ownership permissions of installed software packages, including many that are important to system ...Rule High Severity -
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 AIDE to Verify the Audit Tools
The operating system file integrity tool must be configured to protect the integrity of the audit tools.Rule Medium 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 -
Configure Periodic Execution of AIDE
At a minimum, AIDE should be configured to run a weekly scan. To implement a daily execution of AIDE at 4:05am using cron, add the following line t...Rule Medium Severity -
Configure Notification of Post-AIDE Scan Details
AIDE should notify appropriate personnel of the details of a scan after the scan has been run. If AIDE has already been configured for periodic exe...Rule Medium Severity -
Configure AIDE to Use FIPS 140-2 for Validating Hashes
By default, the <code>sha512</code> option is added to the <code>NORMAL</code> ruleset in AIDE. If using a custom ruleset or the <code>sha512</code...Rule Medium Severity -
Configure AIDE to Verify Access Control Lists (ACLs)
By default, the <code>acl</code> option is added to the <code>FIPSR</code> ruleset in AIDE. If using a custom ruleset or the <code>acl</code> optio...Rule Low Severity -
Configure AIDE to Verify Extended Attributes
By default, the <code>xattrs</code> option is added to the <code>FIPSR</code> ruleset in AIDE. If using a custom ruleset or the <code>xattrs</code>...Rule Low Severity -
Audit Tools Must Be Group-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 -
Ensure /var/log Located On Separate Partition
System logs are stored in the <code>/var/log</code> directory. Ensure that <code>/var/log</code> has its own partition or logical volume at instal...Rule Low 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 10 natively supports partition encryption through the Linux Unified Key Setup-on-disk-format (LUKS) technology. The easies...Rule High Severity -
Ensure /boot Located On Separate Partition
It is recommended that the <code>/boot</code> directory resides on a separate partition. This makes it easier to apply restrictions e.g. through th...Rule Medium Severity -
Ensure /dev/shm is configured
The <code>/dev/shm</code> is a traditional shared memory concept. One program will create a memory portion, which other processes (if permitted) ca...Rule Low 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 /opt Located On Separate Partition
It is recommended that the/optdirectory resides on a separate partition.Rule Medium 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 /usr Located On Separate Partition
It is recommended that the/usrdirectory resides on a separate partition.Rule Medium Severity -
Enable the LDAP Client For Use in Authconfig
To determine if LDAP is being used for authentication, use the following command: <pre>$ sudo grep -i useldapauth /etc/sysconfig/authconfig</pre> ...Rule Medium Severity -
The Chrony package is installed
System time should be synchronized between all systems in an environment. This is typically done by establishing an authoritative time server or se...Rule Medium Severity -
Prevent Unrestricted Mail Relaying
Modify the <pre>/etc/postfix/main.cf</pre> file to restrict client connections to the local network with the following command: <pre>$ sudo postcon...Rule Medium Severity -
NFS and RPC
The Network File System is a popular distributed filesystem for the Unix environment, and is very widely deployed. This section discusses the circ...Group -
Uninstall nfs-utils Package
Thenfs-utilspackage can be removed with the following command:$ sudo dnf remove nfs-utils
Rule Low Severity -
Disable All NFS Services if Possible
If there is not a reason for the system to operate as either an NFS client or an NFS server, follow all instructions in this section to disable sub...Group -
Disable Services Used Only by NFS
If NFS is not needed, disable the NFS client daemons nfslock, rpcgssd, and rpcidmapd. <br> <br> All of these daemons run with elevated priv...Group -
Disable rpcbind Service
The rpcbind utility maps RPC services to the ports on which they listen. RPC processes notify rpcbind when they start, registering the ports they a...Rule Low Severity -
Configure NFS Clients
The steps in this section are appropriate for systems which operate as NFS clients.Group -
Disable NFS Server Daemons
There is no need to run the NFS server daemons <code>nfs</code> and <code>rpcsvcgssd</code> except on a small number of properly secured systems de...Group -
Disable Network File System (nfs)
The Network File System (NFS) service allows remote hosts to mount and interact with shared filesystems on the local system. If the local system is...Rule Unknown Severity -
Mount Remote Filesystems with Restrictive Options
Edit the file <code>/etc/fstab</code>. For each filesystem whose type (column 3) is <code>nfs</code> or <code>nfs4</code>, add the text <code>,node...Group -
Mount Remote Filesystems with Kerberos Security
Add the <code>sec=krb5:krb5i:krb5p</code> option to the fourth column of <code>/etc/fstab</code> for the line which controls mounting of any NFS mo...Rule Medium Severity -
Mount Remote Filesystems with nodev
Add thenodevoption to the fourth column of/etc/fstabfor the line which controls mounting of any NFS mounts.Rule Medium Severity -
Mount Remote Filesystems with noexec
Add thenoexecoption to the fourth column of/etc/fstabfor the line which controls mounting of any NFS mounts.Rule Medium Severity -
Mount Remote Filesystems with nosuid
Add thenosuidoption to the fourth column of/etc/fstabfor the line which controls mounting of any NFS mounts.Rule Medium Severity -
Configure NFS Servers
The steps in this section are appropriate for systems which operate as NFS servers.Group -
Use Kerberos Security on All Exports
Using Kerberos on all exported mounts prevents a malicious client or user from impersonating a system user. To cryptography authenticate users to t...Rule Medium Severity -
Network Time Protocol
The Network Time Protocol is used to manage the system clock over a network. Computer clocks are not very accurate, so time will drift unpredictabl...Group -
Vendor Approved Time pools
The list of vendor-approved pool serversValue -
Vendor Approved Time Servers
The list of vendor-approved time serversValue -
Maximum NTP or Chrony Poll
The maximum NTP or Chrony poll interval number in seconds specified as a power of two.Value -
Interactive users initialization files
'A regular expression describing a list of file names for files that are sourced at login time for interactive users'Value -
Ensure Home Directories are Created for New Users
All local interactive user accounts, upon creation, should be assigned a home directory. <br> <br> Configure the operating system to assign...Rule Medium Severity -
Ensure the Logon Failure Delay is Set Correctly in login.defs
To ensure the logon failure delay controlled by <code>/etc/login.defs</code> is set properly, add or correct the <code>FAIL_DELAY</code> setting in...Rule Medium Severity -
Sudo - timestamp_timeout value
Defines the number of minutes that can elapse before <code>sudo</code> will ask for a passwd again. If set to a value less than 0 the user's time s...Value
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