fix(k8s): skip resources without misconfigs

[afdesk]

Description

This PR fixes overriding of existed misconfigurations found in image scan.

before

Infra Assessment
┌─────────────┬──────────────────────────────────────────────┬───────────────────┬───────────────────┬───────────────────┐
│  Namespace  │                   Resource                   │  Vulnerabilities  │ Misconfigurations │      Secrets      │
│             │                                              ├───┬───┬───┬───┬───┼───┬───┬───┬───┬───┼───┬───┬───┬───┬───┤
│             │                                              │ C │ H │ M │ L │ U │ C │ H │ M │ L │ U │ C │ H │ M │ L │ U │
├─────────────┼──────────────────────────────────────────────┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┼───┤
│ kube-system │ Service/hubble-peer                          │   │   │   │   │   │   │   │ 1 │   │   │   │   │   │   │   │
│ kube-system │ Service/kube-dns                             │   │   │   │   │   │   │   │ 1 │   │   │   │   │   │   │   │
│ kube-system │ ConfigMap/cilium-config                      │   │   │   │   │   │   │   │ 1 │   │   │   │   │   │   │   │
│ kube-system │ ConfigMap/extension-apiserver-authentication │   │   │   │   │   │   │   │ 1 │   │   │   │   │   │   │   │
└─────────────┴──────────────────────────────────────────────┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┘
Severities: C=CRITICAL H=HIGH M=MEDIUM L=LOW U=UNKNOWN

after:

Infra Assessment
┌─────────────┬──────────────────────────────────────────────┬───────────────────┬──────────────────────┬───────────────────┐
│  Namespace  │                   Resource                   │  Vulnerabilities  │  Misconfigurations   │      Secrets      │
│             │                                              ├───┬───┬───┬───┬───┼───┬────┬────┬────┬───┼───┬───┬───┬───┬───┤
│             │                                              │ C │ H │ M │ L │ U │ C │ H  │ M  │ L  │ U │ C │ H │ M │ L │ U │
├─────────────┼──────────────────────────────────────────────┼───┼───┼───┼───┼───┼───┼────┼────┼────┼───┼───┼───┼───┼───┼───┤
│ kube-system │ Deployment/coredns                           │   │   │   │   │   │   │ 1  │ 4  │ 4  │   │   │   │   │   │   │
│ kube-system │ Service/hubble-peer                          │   │   │   │   │   │   │    │ 1  │    │   │   │   │   │   │   │
│ kube-system │ Service/kube-dns                             │   │   │   │   │   │   │    │ 1  │    │   │   │   │   │   │   │
│ kube-system │ ConfigMap/cilium-config                      │   │   │   │   │   │   │    │ 1  │    │   │   │   │   │   │   │
│ kube-system │ ConfigMap/extension-apiserver-authentication │   │   │   │   │   │   │    │ 1  │    │   │   │   │   │   │   │
│ kube-system │ DaemonSet/cilium                             │   │   │   │   │   │   │ 19 │ 28 │ 57 │   │   │   │   │   │   │
│ kube-system │ DaemonSet/kube-proxy                         │   │   │   │   │   │   │ 3  │ 5  │ 9  │   │   │   │   │   │   │
│ kube-system │ Deployment/cilium-operator                   │   │   │   │   │   │   │ 2  │ 4  │ 9  │   │   │   │   │   │   │
└─────────────┴──────────────────────────────────────────────┴───┴───┴───┴───┴───┴───┴────┴────┴────┴───┴───┴───┴───┴───┴───┘
Severities: C=CRITICAL H=HIGH M=MEDIUM L=LOW U=UNKNOWN

Related issues

• Close bug(k8s): inconsistent results for scan with and without images #7790

Checklist

• I've read the guidelines for contributing to this repository.
• I've followed the conventions in the PR title.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

[simar7]

Could you add a test in report_test.go to cover this case?

[afdesk]

good catch! thanks!
done 4bc5434

[afdesk]

@simar7 could you take a look again? thanks!

[simar7]

lgtm @afdesk we just need to resolve merge conflicts prior to merge. Could you update and push that?

[afdesk]

@simar7 thanks! sure, I'll fix the conflict