STIGQter: STIG Summary: Oracle Linux 9 Security Technical Implementation Guide Version: 1 Release: 6 Benchmark Date: 01 Jul 2026:

OL 9 must automatically lock an account when three unsuccessful logon attempts occur during a 15-minute time period.

DISA Rule

SV-271754r1184208_rule

Vulnerability Number

V-271754

Group Title

SRG-OS-000329-GPOS-00128

Rule Version

OL09-00-002416

Severity

CAT II

CCI(s)

• CCI-002238 - Automatically lock the account or node for either an organization-defined time period, until the locked account or node is released by an administrator, or delays the next logon prompt according to the organization-defined delay algorithm when the maximum number of unsuccessful logon attempts is exceeded.
• CCI-000044 - Enforce the organization-defined limit of consecutive invalid logon attempts by a user during the organization-defined time period.

Weight

10

Fix Recommendation

Configure OL 9 to lock out the "root" account after a number of incorrect login attempts within 15 minutes using "pam_faillock.so" by enabling the feature using the following command:

$ sudo authselect enable-feature with-faillock

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

fail_interval = 900

Check Contents

Verify OL 9 locks an account after three unsuccessful logon attempts within a period of 15 minutes with the following command:

$ 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.

Vulnerability Number

V-271754

Documentable

False

Rule Version

OL09-00-002416

Severity Override Guidance

Verify OL 9 locks an account after three unsuccessful logon attempts within a period of 15 minutes with the following command:

$ 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.

Check Content Reference

M

Target Key

5680