Finding ID | Version | Rule ID | IA Controls | Severity |
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V-77491 | SLES-12-030380 | SV-92187r1_rule | Medium |
Description |
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Responding to broadcast (ICMP) echoes facilitates network mapping and provides a vector for amplification attacks. |
STIG | Date |
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SLES 12 Security Technical Implementation Guide | 2019-03-12 |
Check Text ( C-77051r1_chk ) |
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Verify the SUSE operating system does not accept IPv4 source-routed packets. Check the value of the accept source route variable with the following command: # sysctl net.ipv4.conf.all.accept_source_route net.ipv4.conf.all.accept_source_route = 0 If the returned line does not have a value of "0" this is a finding. |
Fix Text (F-84133r1_fix) |
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Configure the SUSE operating system to the required kernel parameter by adding the following line to "/etc/sysctl.conf" (or modify the line to have the required value): net.ipv4.conf.all.accept_source_route = 0 Run the following command to apply this value: # sysctl --system |