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RHEL-10-600420 RHEL 10 must automatically lock an account when three unsuccessful login attempts occur during a 15-minute time period.

DISA STIG library V1R3
All changes in this version
first version loaded CAT II

Maps to AC-7 via CCI-002238, CCI-000044

Title

RHEL 10 must automatically lock an account when three unsuccessful login attempts occur during a 15-minute time period.

Control

Verify RHEL 10 locks an account after three unsuccessful login attempts within a period of 15 minutes with the following command: $ sudo grep fail_interval /etc/security/faillock.conf fail_interval = 900 If the "fail_interval" option is not set to "900" or less (but not "0"), the line is commented out, or the line is missing, this is a finding.

Discussion

By limiting the number of failed login attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account. Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005

Related controls

CCI-000044, CCI-002238

Fix

Configure RHEL 10 to lock out the "root" account after a number of incorrect login attempts within 15 minutes using "pam_faillock.so". Enable the feature using the following command: $ authselect enable-feature with-faillock Edit the "/etc/security/faillock.conf" file as follows: fail_interval = 900