The PE router must be configured with Unicast Reverse Path Forwarding (uRPF) loose mode enabled on all CE-facing interfaces..
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-207140 | SRG-NET-000205-RTR-000008 | SV-207140r604135_rule | CCI-001097 | medium |
| Description | ||||
| The uRPF feature is a defense against spoofing and denial-of-service (DoS) attacks by verifying if the source address of any ingress packet is reachable. To mitigate attacks that rely on forged source addresses, all provider edge routers must enable uRPF loose mode to guarantee that all packets received from a CE router contain source addresses that are in the route table. | ||||
| STIG | Date | |||
| Router Security Requirements Guide | 2024-05-28 | |||
Related Frameworks
5 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
SC-7
1.00
- DISA · 5 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1713 mappings
3.13.1
1.00
- DISA · 5 · 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
3.13.2
1.00
- DISA · 5 · 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
3.13.5
1.00
- DISA · 5 · 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-001097
1.00
- DISA · 5 · disa_xccdf · related
Details
Check Text (C-207140r604135_chk)
Review the router configuration to determine if uRPF loose mode is enabled on all CE-facing interfaces.
If uRPF loose mode is not enabled on all CE-facing interfaces, this is a finding.
Fix Text (F-7401r382359_fix)
Enable uRPF loose mode on all CE-facing interfaces.