Detections
Analytics

1.198 RHEL-09-254020

Information

RHEL 9 must not forward IPv6 source-routed packets.

GROUP ID: V-257973
RULE ID: SV-257973r991589

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 forwarding is enabled and the system is functioning as a router.

Solution

Configure RHEL 9 to not forward IPv6 source-routed packets.

Add or edit the following line in a single system configuration file, in the "/etc/sysctl.d/" directory:

net.ipv6.conf.all.accept_source_route = 0

Load settings from all system configuration files with the following command:

$ sudo sysctl --system

See Also

https://workbench.cisecurity.org/benchmarks/22008

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-257973r991589_rule, STIG-ID|RHEL-09-254020, Vuln-ID|V-257973

Plugin: Unix

Control ID: ee30c54f133d7d39d434887dc076f3153b6f933ba79902cfbfe9f5de2452232a