The Kubernetes Controller Manager must have secure binding.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-242385 | CNTR-K8-000310 | SV-242385r960792_rule | CCI-000213 | medium |
| Description | ||||
| Limiting the number of attack vectors and implementing authentication and encryption on the endpoints available to external sources is paramount when securing the overall Kubernetes cluster. The Controller Manager API service exposes port 10252/TCP by default for health and metrics information use. This port does not encrypt or authenticate connections. If this port is exposed externally, an attacker can use this port to attack the entire Kubernetes cluster. By setting the bind address to only localhost (i.e., 127.0.0.1), only those internal services that require health and metrics information can access the Control Manager API. | ||||
| STIG | Date | |||
| Kubernetes Security Technical Implementation Guide | 2025-05-16 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
AC-3
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.1.1
1.00
- DISA · 2 · 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
3.1.2
1.00
- DISA · 2 · 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-000213
1.00
- DISA · 2 · disa_xccdf · related
Details
Check Text (C-242385r960792_chk)
Change to the /etc/kubernetes/manifests directory on the Kubernetes Control Plane. Run the command:
grep -i bind-address *
If the setting bind-address is not set to "127.0.0.1" or is not found in the Kubernetes Controller Manager manifest file, this is a finding.
Fix Text (F-45618r863759_fix)
Edit the Kubernetes Controller Manager manifest file in the /etc/kubernetes/manifests directory on the Kubernetes Control Plane. Set the argument "--bind-address" to "127.0.0.1".