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RHEL-10-600410 RHEL 10 must automatically lock an account when three unsuccessful login attempts occur.

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.

Control

Verify RHEL 10 is configured to lock an account after three unsuccessful login attempts with the following command: $ sudo grep 'deny =' /etc/security/faillock.conf deny = 3 If the "deny" option is not set to "3" or less (but not "0"), or is missing or commented out, 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-force attacks, 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 an account when three unsuccessful login attempts occur. Add/modify the "/etc/security/faillock.conf" file to match the following line: deny = 3