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V-271755

CAT II (Medium)

OL 9 must maintain an account lock until the locked account is released by an administrator.

Rule ID

SV-271755r1091977_rule

STIG

Oracle Linux 9 Security Technical Implementation Guide

Version

V1R5

CCIs

CCI-002238 CCI-000044

Discussion

By limiting the number of failed logon 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

Check Content

Verify that OL 9 is configured to lock an account until released by an administrator after three unsuccessful logon attempts with the command:

$ grep 'unlock_time =' /etc/security/faillock.conf
unlock_time = 0

If the "unlock_time" option is not set to "0", the line is missing, or commented out, this is a finding.

Fix Text

Configure OL 9 to lock an account until released by an administrator after three unsuccessful logon attempts with the command:
 
$ sudo authselect enable-feature with-faillock  

Then edit the "/etc/security/faillock.conf" file as follows:

unlock_time = 0