SV-215813r960840: The Cisco router must be configured to enforce the limit of three consecutive invalid logon attempts, after which time it must lock out the user account from accessing the device for 15 minutes. | Cisco IOS XE Router NDM STIG SCAP Benchmark

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Assessment Title

Rule Text

The Cisco router must be configured to enforce the limit of three consecutive invalid logon attempts, after which time it must lock out the user account from accessing the device for 15 minutes.

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-forcing, is reduced.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000044SV-105345V-96207

References

DPMS Target Cisco IOS XE Router NDM DISA DPMS Target Cisco IOS XE Router NDM 4020

Checks

DISA STIG (Manual Reference)

Review the Cisco router configuration to verify that it enforces the limit of three consecutive invalid logon attempts as shown in the example below.

login block-for 900 attempts 3 within 120

Note: The configuration example above will block any login attempt for 15 minutes after three consecutive invalid logon attempts within a two-minute period.

If the Cisco router is not configured to enforce the limit of three consecutive invalid logon attempts, this is a finding.

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.

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
# This script implements the OVAL definition oval:mil.disa.stig.cisco.iosxe:def:106
if [ -s /path/to/cisco/config ]; then
	if grep -q "^login[ \\t]+block-for[ \\t]+\\d+[ \\t]+attempts[ \\t]+(?:1|2|3)[ \\t]+within[ \\t]+\\d+[ \\t]*$" /path/to/cisco/config; then
		echo "PASS"
		exit 0
	else
		echo "FAIL"
		exit 1
	fi
else
	echo "FAIL"
	exit 1
fi

Remediation

Configure the Cisco router to enforce the limit of three consecutive invalid logon attempts as shown in the example below.

R2(config)#login block-for 900 attempts 3 within 120