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opendesk/docs/security/net-mgt/net-mgt-001_service-external-ips.yaml
Sebastian Kawelke ac712f4063 Adds further kyverno policies
Signed-off-by: Sebastian Kawelke <sebastian.kawelke@l3montree.com>
2025-12-03 11:48:43 +01:00

37 lines
1.2 KiB
YAML

# Source: https://github.com/kyverno/policies/tree/main/pod-security
# License: Apache-2.0
apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
name: restrict-external-ips
labels:
opendesk.eu/security-id: net-mgt-001
annotations:
policies.kyverno.io/title: Restrict External IPs
policies.kyverno.io/category: Best Practices
policies.kyverno.io/minversion: 1.6.0
policies.kyverno.io/severity: medium
policies.kyverno.io/subject: Service
policies.kyverno.io/description: >-
Service externalIPs can be used for a MITM attack (CVE-2020-8554).
Restrict externalIPs or limit to a known set of addresses.
See: https://github.com/kyverno/kyverno/issues/1367. This policy validates
that the `externalIPs` field is not set on a Service.
spec:
validationFailureAction: Audit
background: true
rules:
- name: check-ips
match:
any:
- resources:
kinds:
- Service
validate:
message: "externalIPs are not allowed."
pattern:
spec:
# restrict external IP addresses
# you can alternatively restrict to a known set of addresses using:
# =(externalIPs): ["37.10.11.53", "153.10.20.1"]
X(externalIPs): "null"