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Guide to the Secure Configuration of Red Hat Enterprise Linux 8

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Do Not Show System Messages When Unsuccessful Logon Attempts Occur

    This rule ensures the system prevents informative messages from being presented to the user pertaining to logon information after a number of incor...
    Rule Medium Severity
    Show

  • Set Lockout Time for Failed Password Attempts

    This rule configures the system to lock out accounts during a specified time period after a number of incorrect login attempts using <code>pam_fail...
    Rule Medium Severity
    Show

  • Set Password Quality Requirements

    The default <code>pam_pwquality</code> PAM module provides strength checking for passwords. It performs a number of checks, such as making sure pas...
    Group
    Show

  • Set Password Quality Requirements, if using pam_cracklib

    The <code>pam_cracklib</code> PAM module can be configured to meet requirements for a variety of policies. <br><br> For example, to configure <code...
    Group
    Show

  • Set Password Quality Requirements with pam_pwquality

    The <code>pam_pwquality</code> PAM module can be configured to meet requirements for a variety of policies. <br><br> For example, to configure <cod...
    Group
    Show

  • dcredit

    Minimum number of digits in password
    Value
    Show

  • dictcheck

    Prevent the use of dictionary words for passwords.
    Value
    Show

  • difok

    Minimum number of characters not present in old password
    Value
    Show

  • lcredit

    Minimum number of lower case in password
    Value
    Show

  • maxclassrepeat

    Maximum Number of Consecutive Repeating Characters in a Password From the Same Character Class
    Value
    Show

  • maxrepeat

    Maximum Number of Consecutive Repeating Characters in a Password
    Value
    Show

  • minclass

    Minimum number of categories of characters that must exist in a password
    Value
    Show

  • minlen

    Minimum number of characters in password
    Value
    Show

  • ocredit

    Minimum number of other (special characters) in password
    Value
    Show

  • retry

    Number of retry attempts before erroring out
    Value
    Show

  • ucredit

    Minimum number of upper case in password
    Value
    Show

  • Ensure PAM Enforces Password Requirements - Minimum Digit Characters

    The pam_pwquality module's <code>dcredit</code> parameter controls requirements for usage of digits in a password. When set to a negative number, a...
    Rule Medium Severity
    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

  • Ensure PAM Enforces Password Requirements - Minimum Different Characters

    The pam_pwquality module's <code>difok</code> parameter sets the number of characters in a password that must not be present in and old password du...
    Rule Medium Severity
    Show

  • Ensure PAM Enforces Password Requirements - Enforce for Local Accounts Only

    The pam_pwquality module's <code>local_users_only</code> parameter controls requirements for enforcing password complexity by pam_pwquality only fo...
    Rule Medium Severity
    Show

  • Ensure PAM Enforces Password Requirements - Enforce for root User

    The pam_pwquality module's <code>enforce_for_root</code> parameter controls requirements for enforcing password complexity for the root user. Enabl...
    Rule Medium Severity
    Show

  • Ensure PAM Enforces Password Requirements - Minimum Lowercase Characters

    The pam_pwquality module's <code>lcredit</code> parameter controls requirements for usage of lowercase letters in a password. When set to a negativ...
    Rule Medium Severity
    Show

  • Ensure PAM Enforces Password Requirements - Maximum Consecutive Repeating Characters from Same Character Class

    The pam_pwquality module's <code>maxclassrepeat</code> parameter controls requirements for consecutive repeating characters from the same character...
    Rule Medium Severity
    Show

  • Set Password Maximum Consecutive Repeating Characters

    The pam_pwquality module's <code>maxrepeat</code> parameter controls requirements for consecutive repeating characters. When set to a positive numb...
    Rule Medium Severity
    Show

  • Ensure PAM Enforces Password Requirements - Minimum Different Categories

    The pam_pwquality module's <code>minclass</code> parameter controls requirements for usage of different character classes, or types, of character t...
    Rule Medium Severity
    Show

  • Ensure PAM Enforces Password Requirements - Minimum Length

    The pam_pwquality module's <code>minlen</code> parameter controls requirements for minimum characters required in a password. Add <code>minlen=<xcc...
    Rule Medium Severity
    Show

  • Ensure PAM Enforces Password Requirements - Minimum Special Characters

    The pam_pwquality module's <code>ocredit=</code> parameter controls requirements for usage of special (or "other") characters in a password. When s...
    Rule Medium Severity
    Show

  • Ensure PAM password complexity module is enabled in password-auth

    To enable PAM password complexity in password-auth file: Edit the <code>password</code> section in <code>/etc/pam.d/password-auth</code> to show <c...
    Rule Medium Severity
    Show

  • Ensure PAM password complexity module is enabled in system-auth

    To enable PAM password complexity in system-auth file: Edit the <code>password</code> section in <code>/etc/pam.d/system-auth</code> to show <code>...
    Rule Medium Severity
    Show

  • Ensure PAM Enforces Password Requirements - Authentication Retry Prompts Permitted Per-Session

    To configure the number of retry prompts that are permitted per-session: Edit the <code>/etc/security/pwquality.conf</code> to include <code>retr...
    Rule Medium Severity
    Show

  • Ensure PAM Enforces Password Requirements - Minimum Uppercase Characters

    The pam_pwquality module's <code>ucredit=</code> parameter controls requirements for usage of uppercase letters in a password. When set to a negati...
    Rule Medium Severity
    Show

  • Set Password Hashing Algorithm

    The system's default algorithm for storing password hashes in /etc/shadow is SHA-512. This can be configured in several locations.
    Group
    Show

  • Set Password Hashing Algorithm in /etc/libuser.conf

    In <code>/etc/libuser.conf</code>, add or correct the following line in its <code>[defaults]</code> section to ensure the system will use the SHA-5...
    Rule Medium Severity
    Show

  • Set Password Hashing Algorithm in /etc/login.defs

    In <code>/etc/login.defs</code>, add or correct the following line to ensure the system will use <xccdf-1.2:sub idref="xccdf_org.ssgproject.content...
    Rule Medium Severity
    Show

  • Set PAM''s Password Hashing Algorithm - password-auth

    The PAM system service can be configured to only store encrypted representations of passwords. In <code>/etc/pam.d/password-auth</code>, the <code>...
    Rule Medium Severity
    Show

  • Set PAM''s Password Hashing Algorithm

    The PAM system service can be configured to only store encrypted representations of passwords. In "/etc/pam.d/system-auth", the <code>password</cod...
    Rule Medium Severity
    Show

  • Set Password Hashing Rounds in /etc/login.defs

    In <code>/etc/login.defs</code>, ensure <code>SHA_CRYPT_MIN_ROUNDS</code> and <code>SHA_CRYPT_MAX_ROUNDS</code> has the minimum value of <code>5000...
    Rule Medium Severity
    Show

  • Protect Physical Console Access

    It is impossible to fully protect a system from an attacker with physical access, so securing the space in which the system is located should be co...
    Group
    Show

  • Login timeout for idle sessions

    Specify duration of allowed idle time.
    Value
    Show

  • Disable debug-shell SystemD Service

    SystemD's <code>debug-shell</code> service is intended to diagnose SystemD related boot issues with various <code>systemctl</code> commands. Once e...
    Rule Medium Severity
    Show

  • Disable Ctrl-Alt-Del Burst Action

    By default, <code>SystemD</code> will reboot the system if the <code>Ctrl-Alt-Del</code> key sequence is pressed Ctrl-Alt-Delete more than 7 times ...
    Rule High Severity
    Show

  • Disable Ctrl-Alt-Del Reboot Activation

    By default, <code>SystemD</code> will reboot the system if the <code>Ctrl-Alt-Del</code> key sequence is pressed. <br><br> To configure the system ...
    Rule High Severity
    Show

  • Configure tmux to lock session after inactivity

    To enable console screen locking in <code>tmux</code> terminal multiplexer after a period of inactivity, the <code>lock-after-time</code> option ha...
    Rule Medium Severity
    Show

  • Verify that Interactive Boot is Disabled

    Red Hat Enterprise Linux 8 systems support an "interactive boot" option that can be used to prevent services from being started. On a Red Hat Enter...
    Rule Medium Severity
    Show

  • Configure Logind to terminate idle sessions after certain time of inactivity

    To configure <code>logind</code> service to terminate inactive user sessions after <xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_log...
    Rule Medium Severity
    Show

  • Require Authentication for Emergency Systemd Target

    Emergency mode is intended as a system recovery method, providing a single user root access to the system during a failed boot sequence. <br><br> B...
    Rule Medium Severity
    Show

  • Require Authentication for Single User Mode

    Single-user mode is intended as a system recovery method, providing a single user root access to the system by providing a boot option at startup. ...
    Rule Medium Severity
    Show

  • Configure Screen Locking

    When a user must temporarily leave an account logged-in, screen locking should be employed to prevent passersby from abusing the account. User educ...
    Group
    Show

  • Configure Console Screen Locking

    A console screen locking mechanism is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the in...
    Group
    Show

  • Install the tmux Package

    To enable console screen locking, install the <code>tmux</code> package. A session lock is a temporary action taken when a user stops work and move...
    Rule Medium Severity
    Show

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