TOSS 5 must automatically lock an account when three unsuccessful login attempts occur.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-282360 | SRG-OS-000021-GPOS-00005 | TOSS-05-000304 | SV-282360r1200060_rule | 2026-04-01 | 1 |
Description
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-000021-GPOS-00005, SRG-OS-000329-GPOS-00128
ℹ️ Check
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.
✔️ Fix
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