OL 9 must not forward IPv6 source-routed packets.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-271879 | OL09-00-006042 | SV-271879r1092349_rule | CCI-000366 | medium |
| 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 forwarding is enabled and the system is functioning as a router. | ||||
| STIG | Date | |||
| Oracle Linux 9 Security Technical Implementation Guide | 2025-05-08 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · 1 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · 1 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · 1 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · 1 · disa_xccdf · related
Details
Check Text (C-271879r1092349_chk)
Note: If IPv6 is disabled on the system, this requirement is Not Applicable.
Verify that OL 9 does not accept IPv6 source-routed packets.
Check the value of the accept source route variable with the following command:
$ sysctl net.ipv6.conf.all.accept_source_route
net.ipv6.conf.all.accept_source_route = 0
If the returned line does not have a value of "0", a line is not returned, or the line is commented out, this is a finding.
Fix Text (F-75836r1092348_fix)
Configure OL 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