Detections
Analytics

SLES-12-030370 - The SUSE operating system must not forward Internet Protocol version 4 (IPv4) source-routed packets by default.

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.default.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-217289r991589_rule, STIG-ID|SLES-12-030370, STIG-Legacy|SV-92185, STIG-Legacy|V-77489, Vuln-ID|V-217289

Plugin: Unix

Control ID: 5e247908a80cce324c5c0be47d93451c8a9cc4ea0d7aeabcc162e7daa76619f9