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 SUSE operating system must not allow interfaces to accept Internet Protocol version 6 (IPv6) Internet Control Message Protocol (ICMP) redirect messages by default.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-217293 | SLES-12-030401 | SV-217293r603262_rule | Medium |
| Description |
|---|
| ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. These messages modify the host's route table and are unauthenticated. An illicit ICMP redirect message could result in a man-in-the-middle attack. |
| STIG | Date |
|---|---|
| SLES 12 Security Technical Implementation Guide | 2022-12-06 |
Details
| Check Text ( C-18521r370035_chk ) |
|---|
| Verify the SUSE operating system does not allow IPv6 ICMP redirect messages by default. Check the value of the "default accept_redirects" variables with the following command: # sudo sysctl net.ipv6.conf.default.accept_redirects net.ipv6.conf.default.accept_redirects = 0 If the returned line does not have a value of "0", this is a finding. |
| Fix Text (F-18519r370036_fix) |
|---|
| Configure the SUSE operating system to not allow IPv6 ICMP redirect messages by default. Set the 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.ipv6.conf.default.accept_redirects=0 Run the following command to apply this value: # sysctl –system |