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Guide to the Secure Configuration of Red Hat Enterprise Linux 9

Rules, Groups, and Values defined within the XCCDF Benchmark

  • 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 have their UID changed. <br> If the account is asso...
    Rule High Severity
    Show

  • Verify Root Has A Primary GID 0

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

  • Ensure Authentication Required for Single User Mode

    Single user mode is used for recovery when the system detects an issue during boot or by manual selection from the bootloader.
    Rule Medium Severity
    Show

  • Ensure that System Accounts Are Locked

    Some accounts are not associated with a human user of the system, and exist to perform some administrative functions. An attacker should not be able to log into these accounts. <br> <br> S...
    Rule Medium Severity
    Show

  • Restrict Serial Port Root Logins

    To restrict root logins on serial ports, ensure lines of this form do not appear in /etc/securetty: 
    ttyS0
ttyS1
    Rule Medium Severity
    Show

  • Restrict Virtual Console Root Logins

    To restrict root logins through the (deprecated) virtual console devices, ensure lines of this form do not appear in /etc/securetty: 
    vc/1
vc/2
vc/3
vc/4
    Rule Medium Severity
    Show

  • Enforce usage of pam_wheel for su authentication

    To ensure that only users who are members of the <code>wheel</code> group can run commands with altered privileges through the <code>su</code> command, make sure that the following line exists in t...
    Rule Medium Severity
    Show

  • Secure Session Configuration Files for Login Accounts

    When a user logs into a Unix account, the system configures the user's session by reading a number of files. Many of these files are located in the user's home directory, and may have weak permissi...
    Group
    Show

  • Maximum login attempts delay

    Maximum time in seconds between fail login attempts before re-prompting.
    Value
    Show

  • Maximum concurrent login sessions

    Maximum number of concurrent sessions by a user
    Value
    Show

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