The SUSE operating system must not forward Internet Protocol version 4 (IPv4) source-routed packets.
An XCCDF Rule
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.
- ID
- SV-217287r991589_rule
- Version
- SLES-12-030360
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
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