SV-252946r1190835: TOSS must enforce the limit of five consecutive invalid logon attempts by a user during a 15-minute time period. | Tri-Lab Operating System Stack (TOSS) 4 STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

TOSS must enforce the limit of five consecutive invalid logon attempts by a user during a 15-minute time period.

Description

Discussion Text

By limiting the number of failed logon 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.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000044

References

DPMS Target TOSS 4 DISA DPMS Target TOSS 4 5469

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.stig.toss4os:def:252946
# TOSS must enforce the limit of five consecutive invalid logon attempts by a user during a 15-minute time period.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Checking for deny=3 in /etc/security/faillock.conf
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^\s*deny\s*=\s*([\d]+)\s*$/\1/p' '/etc/security/faillock.conf') | grep -Pq '^[123]$'
}
# Checking for fail_interval=900 in /etc/security/faillock.conf
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  [ "$(sed -En 's/^\s*fail_interval\s*=\s*([\d]+)\s*$/\1/p' '/etc/security/faillock.conf')" -ge 900 ]
}

if ( test_1 && test_2 ); then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# DISA STIG / SCAP compliance check for TOSS enforcing limit of five consecutive invalid logon attempts by a user during a 15-minute time period
if [ ! -f "/etc/security/faillock.conf" ]; then echo "PASS"; exit 0; fi; if ! grep -qE "^\\s*deny\\s*=\\s*3\\s*$" /etc/security/faillock.conf; then echo "FAIL"; exit 1; fi; if ! grep -qE "^\\s*fail_interval\\s*=\\s*900\\s*$" /etc/security/faillock.conf; then echo "FAIL"; exit 1; fi; echo "PASS"; exit 0

Remediation

Configure the operating system to lock an account when three unsuccessful logon attempts occur in 15 minutes.

Add/Modify the "/etc/security/faillock.conf" file to match the following lines:

deny = 3
fail_interval = 900