Restrict Seccomp

 1apiVersion: kyverno.io/v1
 2kind: ClusterPolicy
 3metadata:
 4  name: restrict-seccomp
 5  annotations:
 6    policies.kyverno.io/title: Restrict Seccomp
 7    policies.kyverno.io/category: Pod Security Standards (Restricted)
 8    policies.kyverno.io/severity: medium
 9    policies.kyverno.io/subject: Pod
10    policies.kyverno.io/description: >-
11      The runtime default seccomp profile must be required, or only specific
12      additional profiles should be allowed. This policy, requiring Kubernetes
13      v1.19 or later, ensures that only the `RuntimeDefault` or `Localhost` is
14      used as a `type` and that it is not unset.      
15spec:
16  background: true
17  validationFailureAction: enforce
18  rules:
19  - name: restrict-seccomp
20    match:
21      resources:
22        kinds:
23        - Pod
24    validate:
25      message: >-
26        Use of custom Seccomp profiles is disallowed. The fields
27        spec.securityContext.seccompProfile.type,
28        spec.containers[*].securityContext.seccompProfile.type, and
29        spec.initContainers[*].securityContext.seccompProfile.type
30        must be set to `RuntimeDefault` or `Localhost`.        
31      anyPattern:
32      - spec:
33          securityContext:
34            seccompProfile:
35              type: "RuntimeDefault | Localhost"
36      - spec:
37          containers:
38          - securityContext:
39              seccompProfile:
40                type: "RuntimeDefault | Localhost"
41  - name: restrict-seccomp-initcontainers
42    match:
43      resources:
44        kinds:
45        - Pod
46    validate:
47      message: >-
48        Use of custom Seccomp profiles is disallowed. The fields
49        spec.securityContext.seccompProfile.type,
50        spec.containers[*].securityContext.seccompProfile.type, and
51        spec.initContainers[*].securityContext.seccompProfile.type
52        must be set to `RuntimeDefault` or `Localhost`.        
53      anyPattern:
54      - spec:
55          securityContext:
56            seccompProfile:
57              type: "RuntimeDefault | Localhost"
58      - spec:
59          =(initContainers):
60          - securityContext:
61              seccompProfile:
62                type: "RuntimeDefault | Localhost"
63