Apple OS X 10.13 Security Technical Implementation Guide

The Apple OS X 10.13 Security Technical Implementation Guide (V2 R5) has 135 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V2 · R5

CurrentPublished Wed Apr 27 2022

The macOS system must not send IPv6 ICMP redirects by default.

Apple OS X 10.13 Security Technical Implementation Guide

Assessment Title

Rule Text

The macOS system must not send IPv6 ICMP redirects by default.

Description

Discussion Text

ICMP redirects are broadcast to reshape network traffic. A malicious user could use the system to send fake redirect packets and try to force all network traffic to pass through a network sniffer. Disabling ICMP redirect broadcasts mitigates this risk.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-214914

Rule

SV-214914r609363_rule

Severity

medium

Rule Version

AOSX-13-001211

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

To check if the system is configured to send ICMP redirects, run the following command:

sysctl net.inet6.ip6.redirect

If the values are not set to "0", this is a finding.

Implementation Procedure

Fix Text

To configure the system to not send ICMP redirects, add the following line to "/etc/sysctl.conf", creating the file if necessary:

net.inet6.ip6.redirect=0

STIG check 109 of 135 in the Apple OS X 10.13 STIG checklist

← Previous · V-214913The macOS system must not send IPv4 ICMP redirects by default.Next · V-214915 →The macOS system must prevent local applications from generating source-routed packets.