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Guide to the Secure Configuration of Red Hat Enterprise Linux 10

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Limit Password Reuse: password-auth

    Do not allow users to reuse recent passwords. This can be accomplished by using the <code>remember</code> option for the <code>pam_pwhistory</code>...
    Rule Medium Severity
    Show

  • Limit Password Reuse: system-auth

    Do not allow users to reuse recent passwords. This can be accomplished by using the <code>remember</code> option for the <code>pam_pwhistory</code>...
    Rule Medium Severity
    Show

  • Limit Password Reuse

    Do not allow users to reuse recent passwords. This can be accomplished by using the <code>remember</code> option for the <code>pam_unix</code> or <...
    Rule Medium Severity
    Show

  • Account Lockouts Must Be Logged

    PAM faillock locks an account due to excessive password failures, this event must be logged.
    Rule Medium Severity
    Show

  • Lock Accounts After Failed Password Attempts

    This rule configures the system to lock out accounts after a number of incorrect login attempts using <code>pam_faillock.so</code>. pam_faillock.so...
    Rule Medium Severity
    Show

  • Configure the root Account for Failed Password Attempts

    This rule configures the system to lock out the <code>root</code> account after a number of incorrect login attempts using <code>pam_faillock.so</c...
    Rule Medium Severity
    Show

  • Lock Accounts Must Persist

    This rule ensures that the system lock out accounts using <code>pam_faillock.so</code> persist after system reboot. From "pam_faillock" man pages: ...
    Rule Medium Severity
    Show

  • Set Interval For Counting Failed Password Attempts

    Utilizing <code>pam_faillock.so</code>, the <code>fail_interval</code> directive configures the system to lock out an account after a number of inc...
    Rule Medium Severity
    Show

  • Configure the tmux Lock Command

    To enable console screen locking in <code>tmux</code> terminal multiplexer, the <code>vlock</code> command must be configured to be used as a locki...
    Rule Medium Severity
    Show

  • Set existing passwords a period of inactivity before they been locked

    Configure user accounts that have been inactive for over a given period of time to be automatically disabled by running the following command: <pre...
    Rule Medium Severity
    Show

  • Verify Proper Storage and Existence of Password Hashes

    By default, password hashes for local accounts are stored in the second field (colon-separated) in <code>/etc/shadow</code>. This file should be re...
    Group
    Show

  • Password Hashing algorithm

    Specify the number of rounds for the system password encryption algorithm. Defines the value set in <code>/etc/pam.d/system-auth</code> and <code>/...
    Value
    Show

  • Configure the tmux lock session key binding

    To set a key binding for the screen locking in <code>tmux</code> terminal multiplexer, the <code>session-lock</code> command must be bound to a key...
    Rule Low Severity
    Show

  • Prevent user from disabling the screen lock

    The tmux terminal multiplexer is used to implement automatic session locking. It should not be listed in /etc/shells.
    Rule Low Severity
    Show

  • Hardware Tokens for Authentication

    The use of hardware tokens such as smart cards for system login provides stronger, two-factor authentication than using a username and password. I...
    Group
    Show

  • OpenSC Smart Card Drivers

    Choose the Smart Card Driver in use by your organization. <br>For DoD, choose the <code>cac</code> driver. <br>If your driver is not listed and you...
    Value
    Show

  • Install the opensc Package For Multifactor Authentication

    The opensc package can be installed with the following command: 
    $ sudo dnf install opensc
    Rule Medium Severity
    Show

  • Install the pcsc-lite package

    The pcsc-lite package can be installed with the following command: 
    $ sudo dnf install pcsc-lite
    Rule Medium Severity
    Show

  • Verify No netrc Files Exist

    The <code>.netrc</code> files contain login information used to auto-login into FTP servers and reside in the user's home directory. These files ma...
    Rule Medium Severity
    Show

  • Restrict Root Logins

    Direct root logins should be allowed only for emergency use. In normal situations, the administrator should access the system via a unique unprivil...
    Group
    Show

  • Group Name Used by pam_wheel Group Parameter

    pam_wheel module has a parameter called group, which controls which groups can access the su command. This variable holds the valid value for the p...
    Value
    Show

  • Verify Only Root Has UID 0

    If any account other than root has a UID of 0, this misconfiguration should be investigated and the accounts other than root should be removed or h...
    Rule High Severity
    Show

  • Verify All Account Password Hashes are Shadowed

    If any password hashes are stored in <code>/etc/passwd</code> (in the second field, instead of an <code>x</code> or <code>*</code>), the cause of t...
    Rule Medium Severity
    Show

  • Verify All Account Password Hashes are Shadowed with SHA512

    Verify the operating system requires the shadow password suite configuration be set to encrypt interactive user passwords using a strong cryptograp...
    Rule Medium Severity
    Show

  • Ensure all users last password change date is in the past

    All users should have a password change date in the past.
    Rule Medium Severity
    Show

  • Set number of Password Hashing Rounds - password-auth

    Configure the number or rounds for the password hashing algorithm. This can be accomplished by using the <code>rounds</code> option for the <code>p...
    Rule Medium Severity
    Show

  • Verify Root Has A Primary GID 0

    The root user should have a primary group of 0.
    Rule High Severity
    Show

  • Verify Group Who Owns /etc/ipsec.conf File

    To properly set the group owner of /etc/ipsec.conf, run the command: 
    $ sudo chgrp root /etc/ipsec.conf
    Rule Medium Severity
    Show

  • Verify Group Who Owns /etc/ipsec.secrets File

    To properly set the group owner of /etc/ipsec.secrets, run the command: 
    $ sudo chgrp root /etc/ipsec.secrets
    Rule Medium Severity
    Show

  • Verify User Who Owns /etc/ipsec.conf File

    To properly set the owner of /etc/ipsec.conf, run the command: 
    $ sudo chown root /etc/ipsec.conf
    Rule Medium Severity
    Show

  • Verify User Who Owns /etc/ipsec.secrets File

    To properly set the owner of /etc/ipsec.secrets, run the command: 
    $ sudo chown root /etc/ipsec.secrets
    Rule Medium Severity
    Show

  • Verify Permissions On /etc/ipsec.conf File

    To properly set the permissions of /etc/ipsec.conf, run the command: 
    $ sudo chmod 0644 /etc/ipsec.conf
    Rule Medium Severity
    Show

  • Verify Permissions On /etc/ipsec.secrets File

    To properly set the permissions of /etc/ipsec.secrets, run the command: 
    $ sudo chmod 0644 /etc/ipsec.secrets
    Rule Medium Severity
    Show

  • Verify Any Configured IPSec Tunnel Connections

    Libreswan provides an implementation of IPsec and IKE, which permits the creation of secure tunnels over untrusted networks. As such, IPsec can be ...
    Rule Medium Severity
    Show

  • net.ipv6.conf.default.accept_redirects

    Toggle ICMP Redirect Acceptance By Default
    Value
    Show

  • net.ipv6.conf.default.accept_source_route

    Trackers could be using source-routed packets to generate traffic that seems to be intra-net, but actually was created outside and has been redirec...
    Value
    Show

  • net.ipv6.conf.default.autoconf

    Enable auto configuration on IPv6 interfaces
    Value
    Show

  • net.ipv6.conf.default.max_addresses

    Maximum number of autoconfigured IPv6 addresses
    Value
    Show

  • net.ipv6.conf.default.router_solicitations

    Accept all router solicitations by default?
    Value
    Show

  • Install Smart Card Packages For Multifactor Authentication

    Configure the operating system to implement multifactor authentication by installing the required package with the following command:
    Rule Medium Severity
    Show

  • net.ipv4.conf.all.secure_redirects

    Enable to prevent hijacking of routing path by only allowing redirects from gateways known in routing table. Disable to refuse acceptance of secure...
    Value
    Show

  • net.ipv4.conf.all.shared_media

    Controls whether the system can send (router) or accept (host) RFC1620 shared media redirects. <code>shared_media</code> for the interface will be ...
    Value
    Show

  • net.ipv4.conf.default.accept_redirects

    Disable ICMP Redirect Acceptance?
    Value
    Show

  • net.ipv4.conf.default.accept_source_route

    Disable IP source routing?
    Value
    Show

  • net.ipv4.conf.default.log_martians

    Disable so you don't Log Spoofed Packets, Source Routed Packets, Redirect Packets
    Value
    Show

  • net.ipv4.conf.default.rp_filter

    Enables source route verification
    Value
    Show

  • Ensure that Root's Path Does Not Include Relative Paths or Null Directories

    Ensure that none of the directories in root's path is equal to a single <code>.</code> character, or that it contains any instances that lead to re...
    Rule Unknown Severity
    Show

  • Ensure that Users Have Sensible Umask Values

    The umask setting controls the default permissions for the creation of new files. With a default <code>umask</code> setting of 077, files and direc...
    Group
    Show

  • Ensure PAM Enforces Password Requirements - Prevent the Use of Dictionary Words

    The pam_pwquality module's <code>dictcheck</code> check if passwords contains dictionary words. When <code>dictcheck</code> is set to <code>1</code...
    Rule Medium Severity
    Show

  • Sensible umask

    Enter default user umask
    Value
    Show

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