Finding ID | Version | Rule ID | IA Controls | Severity |
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V-59743 | AOSX-10-001200 | SV-74173r1_rule | Medium |
Description |
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ICMP redirects are broadcast in order to reshape network traffic. A malicious user could craft fake redirect packets and try to force all network traffic to pass through a network sniffer. If the system is not configured to ignore these packets, it could be susceptible to this kind of attack. |
STIG | Date |
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Apple OS X 10.10 (Yosemite) Workstation Security Technical Implementation Guide | 2017-04-06 |
Check Text ( C-60513r1_chk ) |
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To check if the system is configured to ignore ICMP redirect messages, run the following command: sysctl net.inet.icmp.drop_redirect If the value is not '1', this is a finding. |
Fix Text (F-65153r1_fix) |
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To configure the system to ignore ICMP redirect messages, add the following line to /etc/sysctl.conf: net.inet.icmp.drop_redirect=1 |