Changes are coming to https://stigviewer.com.
Take our survey to help us understand your usage and how we can better serve you in the future.
Take Survey
The system must not apply reversed source routing to TCP responses.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22412 | GEN003605 | SV-46156r1_rule | Medium |
| Description |
|---|
| Source-routed packets allow the source of the packet to suggest routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. |
| STIG | Date |
|---|---|
| SUSE Linux Enterprise Server v11 for System z | 2016-12-20 |
Details
| Check Text ( C-43417r1_chk ) |
|---|
| Check the reverse source route settings for the system: # sysctl net.ipv4.conf.all.accept_source_route # sysctl net.ipv4.conf.default.accept_source_route If either setting has a value other than zero, this is a finding. |
| Fix Text (F-39495r1_fix) |
|---|
| Add the entries in /etc/sysctl.conf to disable reverse source routing: # printf "sysctl net.ipv4.conf.all.accept_source_route = 0\n" >> /etc/sysctl.conf # printf "sysctl net.ipv4.conf.default.accept_source_route = 0\n" >> /etc/sysctl.conf Activate the updated settings: # /sbin/sysctl -p /etc/sysctl.conf |