STIGQter: STIG Summary: Red Hat Enterprise Linux 8 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 23 Apr 2021:

RHEL 8 must ensure account lockouts persist.

DISA Rule

SV-230339r627750_rule

Vulnerability Number

V-230339

Group Title

SRG-OS-000021-GPOS-00005

Rule Version

RHEL-08-020017

Severity

CAT II

CCI(s)

• CCI-000044 - The information system enforces the organization-defined limit of consecutive invalid logon attempts by a user during the organization-defined time period.

Weight

10

Fix Recommendation

Configure the operating system maintain the contents of the faillock directory after a reboot.

Add/Modify the appropriate sections of the "/etc/pam.d/system-auth" and "/etc/pam.d/password-auth" files to match the following lines:

auth required pam_faillock.so preauth
auth required pam_faillock.so authfail
account required pam_faillock.so

Add/Modify the "/etc/security/faillock.conf" file to match the following line:

dir = /var/log/faillock

Check Contents

Check that the faillock directory contents persist after a reboot with the following commands:

Note: This check applies to RHEL versions 8.2 or newer. If the system is RHEL version 8.0 or 8.1, this check is not applicable.

Verify the pam_faillock.so module is present in the "/etc/pam.d/system-auth" and " /etc/pam.d/password-auth" files:

$ sudo grep pam_faillock.so /etc/pam.d/system-auth /etc/pam.d/password-auth

/etc/pam.d/system-auth:auth required pam_faillock.so preauth
/etc/pam.d/system-auth:auth required pam_faillock.so authfail
/etc/pam.d/system-auth:account required pam_faillock.so
/etc/pam.d/password-auth:auth required pam_faillock.so preauth
/etc/pam.d/password-auth:auth required pam_faillock.so authfail
/etc/pam.d/password-auth:account required pam_faillock.so preauth

If the pam_failllock.so module is not present in the "/etc/pam.d/system-auth" and " /etc/pam.d/password-auth" files, this is a finding.

Verify the "/etc/security/faillock.conf" file is configured use a non-default faillock directory to ensure contents persist after reboot:

$ sudo grep 'dir =' /etc/security/faillock.conf

dir = /var/log/faillock

If the "dir" option is not set to a non-default documented tally log directory, is missing or commented out, this is a finding.

Vulnerability Number

V-230339

Documentable

False

Rule Version

RHEL-08-020017

Severity Override Guidance

Check that the faillock directory contents persist after a reboot with the following commands:

Note: This check applies to RHEL versions 8.2 or newer. If the system is RHEL version 8.0 or 8.1, this check is not applicable.

Verify the pam_faillock.so module is present in the "/etc/pam.d/system-auth" and " /etc/pam.d/password-auth" files:

$ sudo grep pam_faillock.so /etc/pam.d/system-auth /etc/pam.d/password-auth

/etc/pam.d/system-auth:auth required pam_faillock.so preauth
/etc/pam.d/system-auth:auth required pam_faillock.so authfail
/etc/pam.d/system-auth:account required pam_faillock.so
/etc/pam.d/password-auth:auth required pam_faillock.so preauth
/etc/pam.d/password-auth:auth required pam_faillock.so authfail
/etc/pam.d/password-auth:account required pam_faillock.so preauth

If the pam_failllock.so module is not present in the "/etc/pam.d/system-auth" and " /etc/pam.d/password-auth" files, this is a finding.

Verify the "/etc/security/faillock.conf" file is configured use a non-default faillock directory to ensure contents persist after reboot:

$ sudo grep 'dir =' /etc/security/faillock.conf

dir = /var/log/faillock

If the "dir" option is not set to a non-default documented tally log directory, is missing or commented out, this is a finding.

Check Content Reference

M

Target Key

2921

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