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The SUSE operating system must not forward Internet Protocol version 6 (IPv6) source-routed packets.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-81803 | SLES-12-030361 | SV-96517r1_rule | Medium |
| Description |
|---|
| Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. This requirement applies only to the forwarding of source-routed traffic, such as when IPv4 forwarding is enabled and the system is functioning as a router. |
| STIG | Date |
|---|---|
| SLES 12 Security Technical Implementation Guide | 2019-03-12 |
Details
| Check Text ( C-81593r1_chk ) |
|---|
| Verify the SUSE operating system does not accept IPv6 source-routed packets. Check the value of the accept source route variable with the following command: # sudo sysctl net.ipv6.conf.all.accept_source_route net.ipv6.conf.all.accept_source_route = 0 If the returned line does not have a value of "0", this is a finding. |
| Fix Text (F-88653r1_fix) |
|---|
| Configure the SUSE operating system to not accept IPv6 source-routed packets by adding the following line to "/etc/sysctl.conf" (or modify the line to have the required value): net.ipv6.conf.all.accept_source_route = 0 Run the following command to apply this value: # sysctl --system |