Detections
Analytics

SLES-12-030360 - The SUSE operating system must not forward Internet Protocol version 4 (IPv4) source-routed packets.

Information

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.

Solution

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

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_SLES_12_V3R4_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-217287r991589_rule, STIG-ID|SLES-12-030360, STIG-Legacy|SV-92183, STIG-Legacy|V-77487, Vuln-ID|V-217287

Plugin: Unix

Control ID: 77255b5977919843c85069dd83414cae2f22b8b5bc65b2d694d43afe68068a40