The system must prevent local applications from generating source-routed packets.

From Apple OS X 10.9 (Mavericks) Workstation Security Technical Implementation Guide

Associated with: CCI-000366

SV-72883r1_rule The system must prevent local applications from generating source-routed packets.

Vulnerability discussion

A source-routed packet attempts to specify the network path that the system should take. If the system is not configured to block the sending of source-routed packets, an attacker can redirect the system's network traffic.

Check content

To check if the system is configured to forward source-routed packets, run the following command: sysctl net.inet.ip.sourceroute If the value is not set to '0', this is a finding.

Fix text

To configure the system to not forward source-routed packets, add the following line to /etc/sysctl.conf: net.inet.ip.sourceroute=0

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