STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 must automatically lock an account when three unsuccessful login attempts occur.

DISA Rule

SV-282360r1200060_rule

Vulnerability Number

V-282360

Group Title

SRG-OS-000021-GPOS-00005

Rule Version

TOSS-05-000304

Severity

CAT II

CCI(s)

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

Weight

10

Fix Recommendation

Configure TOSS 5 to lock an account when three unsuccessful login attempts occur.

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

deny = 3

Check Contents

Verify TOSS 5 is configured to lock an account after three unsuccessful login attempts using the command:

$ grep 'deny =' /etc/security/faillock.conf

deny = 3

If the "deny" option is not set to "3" or less (but not "0"), is missing or commented out, this is a finding.

Vulnerability Number

V-282360

Documentable

False

Rule Version

TOSS-05-000304

Severity Override Guidance

Verify TOSS 5 is configured to lock an account after three unsuccessful login attempts using the command:

$ grep 'deny =' /etc/security/faillock.conf

deny = 3

If the "deny" option is not set to "3" or less (but not "0"), is missing or commented out, this is a finding.

Check Content Reference

M

Target Key

5738