OpenControls Logo

STIG Viewer

STIGViewer Support

Cisco ACI must be configured so the BGP neighbor is directly connected and will not connect a BGP session to a directly connected neighbor device's loopback address.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-272094CACI-RT-000034SV-272094r1168411_ruleCCI-002385low
Description
Generalized Time To Live Security Mechanism (GTSM) is designed to protect a router's IP-based control plane from denial-of-service (DoS) attacks. Many attacks focused on CPU load and line-card overload can be prevented by implementing GTSM on all Exterior Border Gateway Protocol speaking routers. ACI mitigates this risk in a different way, as currently there is no option for TTL-security or GTSM support; however, ACI, by default, is setup to validate that the BGP neighbor is directly connected and will not even connect a BGP session to a directly connected neighbor devices loopback address.
STIGDate
Cisco ACI Router Security Technical Implementation Guide2025-12-11

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (13) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

MON-01Continuous Monitoring
1.00
MON-01.1Intrusion Detection & Prevention Systems (IDS & IPS)
1.00
MON-01.3Inbound & Outbound Communications Traffic
1.00
MON-01.4System Generated Alerts
1.00
MON-01.8Security Event Monitoring
1.00
NET-01Network Security Controls (NSC)
1.00
NET-02Layered Network Defenses
1.00
SEA-01Secure Engineering Principles
1.00
SEA-02Alignment With Enterprise Architecture
1.00
CAP-01Capacity & Performance Management
0.50

+3 more (top 10 by confidence shown)

NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (36) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-10Concurrent Session Control
1.00
AC-17(9)Disconnect or Disable Access
1.00
AC-2(4)Automated Audit Actions
1.00
AC-3Access Enforcement
1.00
AC-4Information Flow Enforcement
1.00
AC-6(9)Log Use of Privileged Functions
1.00
AU-12Audit Record Generation
1.00
AU-3Content of Audit Records
1.00
AU-5Response to Audit Logging Process Failures
1.00
CM-11(2)Software Installation with Privileged Status
1.00

+26 more (top 10 by confidence shown)

CCI1 mapping
CCI-002385
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (3) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

DE.CM-01
1.00
PR.IR-01
1.00
PR.IR-04
0.50

Who does this work

12 NICE work roles and 9 EC-Council certifications.

This is an inference across published mappings, not a single claim by anyone. This check maps to a control, which maps to a Cybersecurity Framework outcome, which NIST assigns to the work roles below. EC-Council separately maps its certifications to those same roles.

A certification prepares someone for a role. It is not evidence that a holder is qualified, and neither NIST nor EC-Council has stated that any certification here addresses this check.

Work-role assignments published by NIST (NICE Framework Components 2.2.0 and the CSF 2.0 OLIR crosswalk). Certification mappings published by EC-Council.

Details

Check Text (C-272094r1168411_chk)

Review the BGP configuration to verify that TTL security has been configured to the default settings. Navigate to Tenants >> {{your_Tenant}} >> Networking >> L3Out >> {{your_l3out}} >> Logical Node Profiles >> {{your_Logical_node_Profile}} >> Logical Interface Profiles >> {{your_logical_interface_profile}} >> BGP peer x.x.x.x >> Policy. Verify the following in the policy: Disable Connected Check is unmarked EBGP Multihop TTL = 1 If the Cisco ACI is not configured to use GTSM for all Exterior BGP peering sessions, this is a finding.

Fix Text (F-76051r1168410_fix)

If ACI is determined to be configured differently than the default settings, reconfigure to default settings by performing the actions on the BGP connectivity profile (path below). Navigate to Tenants >> {{your_Tenant}} >> Networking >> L3Out >> {{your_l3out}} >> Logical Node Profiles >> {{your_Logical_node_Profile}} >> Logical Interface Profiles >> {{your_logical_interface_profile}} >> BGP peer x.x.x.x >> Policy. Reset the following in the policy: Disable Connected Check is unmarked EBGP Multihop TTL = 1