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Published 20 hours ago • verified publisher icon ckotzbauer
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Scans SBOMs for vulnerabilities with Grype

vulnerability-operator

Scans SBOMs for vulnerabilities

test

Overview

This operator scans all SBOMs from a git-repository for vulnerabilities using Grype. The result-list can be emitted as JSON-file served via an endpoint and/or as Prometheus metrics. There may be more targets in the future. The scans are done periodically.

Kubernetes Compatibility

The image contains versions of k8s.io/client-go. Kubernetes aims to provide forwards & backwards compatibility of one minor version between client and server:

vulnerability-operator k8s.io/{api,apimachinery,client-go} expected kubernetes compatibility
main v0.24.3 1.23.x, 1.24.x, 1.25.x
0.8.0 v0.24.3 1.23.x, 1.24.x, 1.25.x
0.7.0 v0.24.2 1.23.x, 1.24.x, 1.25.x
0.6.0 v0.24.0 1.23.x, 1.24.x, 1.25.x
0.5.0 v0.23.5 1.22.x, 1.23.x, 1.24.x
0.4.0 v0.23.5 1.22.x, 1.23.x, 1.24.x
0.3.0 v0.23.4 1.22.x, 1.23.x, 1.24.x
0.2.0 v0.23.4 1.22.x, 1.23.x, 1.24.x
0.1.0 v0.23.4 1.22.x, 1.23.x, 1.24.x

However, the operator will work with more versions of Kubernetes in general.

Installation

Manifests

kubectl apply -f deploy/

Helm-Chart

Create a YAML file first with the required configurations or use helm-flags instead.

helm repo add ckotzbauer https://ckotzbauer.github.io/helm-charts
helm install ckotzbauer/vulnerability-operator -f your-values.yaml

Configuration

All parameters are cli-flags.

Parameter Required Default Description
verbosity false info Log-level (debug, info, warn, error, fatal, panic)
cron false @hourly Backround-Service interval (CRON). All options from github.com/robfig/cron are allowed
sources false git Comma-delimited list of sources to gather SBOMs from. Possible source currently only git
targets false json Comma-delimited list of targets to sent vulnerability-data to. Possible targets json, metrics, policyreport
grype-config-file false "" Path to grype-config-file to specify ignore-rules.
only-fixed false false Only report CVEs where a fix is available.
min-severity false medium Only report CVEs with a severity greater or equal (negligible, low, medium, high, critical).
git-workingtree false /work Directory to place the git-repo.
git-repository true when git target is used. "" Git-Repository-URL (HTTPS).
git-branch false main Git-Branch to checkout.
git-path false "" Folder-Path inside the Git-Repository.
git-access-token true when git target is used. "" Git-Personal-Access-Token with write-permissions.
reports-dir false /reports Directory to place the reports.

The flags can be configured as args or as environment-variables prefixed with VULN_ to inject sensitive configs as secret values.

Example Helm-Config

args:
  targets: metrics
  min-severity: low
  git-repository: https://github.com/XXX/XXX
  git-path: dev-cluster/sboms
  verbosity: debug
  cron: "0 0 * * * *"

envVars:
  - name: VULN_GIT_ACCESS_TOKEN
    valueFrom:
      secretKeyRef:
        name: "vulnerability-operator"
        key: "accessToken"

servicemonitor:
  enabled: true

Sources

Git

The contents of this git-repository are typically generated from the sbom-generator. All files named sbom.json, sbom.txt, sbom.xml or sbom.spdx are gathered regarding the git-* config-flags.

Targets

JSON

All found vulnerabilities can be requested as file from the /reports/report.json endpoint. The data is structured like this:

Example JSON 
[
  {
    "ID": "CVE-2019-19924",
    "Severity": "Medium",
    "Type": "rpm",
    "Package": "sqlite",
    "Installed": "3.7.17-8.el7_7.1",
    "FixedIn": [],
    "FixState": "wont-fix",
    "URLs": [
      "https://access.redhat.com/security/cve/CVE-2019-19924"
    ],
    "ImageID": "docker.elastic.co/beats/filebeat@sha256:e418d12e08a1b74140c9edc6bdc773110b0f802340e25e2716950bac86ae14ce",
    "Containers": [
      {
        "PodNamespace": "elastic-system",
        "PodName": "filebeat-filebeat-6xkf4",
        "ContainerName": "filebeat"
      },
      {
        "PodNamespace": "elastic-system",
        "PodName": "filebeat-filebeat-g6zbh",
        "ContainerName": "filebeat"
      },
      {
        "PodNamespace": "elastic-system",
        "PodName": "filebeat-filebeat-jkgnh",
        "ContainerName": "filebeat"
      }
    ]
  },
  {
    "ID": "CVE-2020-16250",
    "Severity": "Critical",
    "Type": "go-module",
    "Package": "github.com/hashicorp/vault/api",
    "Installed": "v1.3.1",
    "FixedIn": [],
    "FixState": "unknown",
    "URLs": [
      "https://www.hashicorp.com/blog/category/vault/",
      "https://github.com/hashicorp/vault/blob/master/CHANGELOG.md#151",
      "http://packetstormsecurity.com/files/159478/Hashicorp-Vault-AWS-IAM-Integration-Authentication-Bypass.html"
    ],
    "ImageID": "ghcr.io/kyverno/kyverno@sha256:4fc715e9287446222bf12b1245899b195ecea8beda54c6f6a3587373c376cad1",
    "Containers": [
      {
        "PodNamespace": "kyverno",
        "PodName": "kyverno-555dcf9f66-csmq5",
        "ContainerName": "kyverno"
      },
      {
        "PodNamespace": "kyverno",
        "PodName": "kyverno-555dcf9f66-gsphr",
        "ContainerName": "kyverno"
      }
    ]
  }
]

Metrics

Every CVE is exported with a Prometheus vuln_operator_cves gauge-metric for each container it appears in.

vuln_operator_cves{container_name="kyverno", cve="CVE-2020-16250", fix_state="unknown", image_id="ghcr.io/kyverno/kyverno@sha256:4fc715e9287446222bf12b1245899b195ecea8beda54c6f6a3587373c376cad1", package="github.com/hashicorp/vault/api", k8s_name="kyverno", k8s_namespace="kyverno", k8s_kind="Deployment", severity="Critical", type="go-module", version="v1.3.1"}

Note: The operator removes all metrics from the vector before re-populating it. In the meanwhile the data is not expressive.

Grafana Dashboard

There's a dashboard for Grafana to view the collected vulnerability metrics.

PolicyReport

With the policyreport target set, the operator stores the scan-results as PolicyReport CRs inside the cluster. Each PolicyReport object is owned by the corresponding pod to enable autocleanup by Kubernetes.

Example PolicyReport 
apiVersion: wgpolicyk8s.io/v1alpha2
kind: PolicyReport
metadata:
  creationTimestamp: "2022-06-18T14:57:27Z"
  generation: 3
  labels:
    kubernetes.io/created-by: vulnerability-operator
  name: vuln-kyverno-688464bd95-55drc
  namespace: kyverno
  ownerReferences:
  - apiVersion: v1
    kind: Pod
    name: kyverno-688464bd95-55drc
    uid: 24bdccbb-653a-4005-8463-cf511a919037
  resourceVersion: "160903586"
  uid: e3cd1447-49ef-481d-b44b-cc38239ea870
results:
- category: github.com/theupdateframework/go-tuf
  message: 'github.com/theupdateframework/go-tuf: GHSA-66x3-6cw3-v5gj'
  policy: GHSA-66x3-6cw3-v5gj
  properties:
    FixedVersion: 0.3.0
    InstalledVersion: v0.0.0-20220211205608-f0c3294f63b9
    URL: https://github.com/advisories/GHSA-66x3-6cw3-v5gj
  resources:
  - kind: Pod
    name: kyverno-688464bd95-55drc
    namespace: kyverno
    uid: 24bdccbb-653a-4005-8463-cf511a919037
  result: fail
  severity: high
  source: vulnerability-operator
  timestamp:
    nanos: 728434599
    seconds: 1655564847
- category: google.golang.org/protobuf
  message: 'google.golang.org/protobuf: CVE-2015-5237'
  policy: CVE-2015-5237
  properties:
    FixedVersion: ""
    InstalledVersion: v1.28.0
    URL: https://github.com/google/protobuf/issues/760
  resources:
  - kind: Pod
    name: kyverno-688464bd95-55drc
    namespace: kyverno
    uid: 24bdccbb-653a-4005-8463-cf511a919037
  result: fail
  severity: high
  source: vulnerability-operator
  timestamp:
    nanos: 728434599
    seconds: 1655564847
- category: google.golang.org/protobuf
  message: 'google.golang.org/protobuf: CVE-2021-22570'
  policy: CVE-2021-22570
  properties:
    FixedVersion: ""
    InstalledVersion: v1.28.0
    URL: https://github.com/protocolbuffers/protobuf/releases/tag/v3.15.0
  resources:
  - kind: Pod
    name: kyverno-688464bd95-55drc
    namespace: kyverno
    uid: 24bdccbb-653a-4005-8463-cf511a919037
  result: fail
  severity: high
  source: vulnerability-operator
  timestamp:
    nanos: 728434599
    seconds: 1655564847
- category: google.golang.org/protobuf
  message: 'google.golang.org/protobuf: CVE-2015-5237'
  policy: CVE-2015-5237
  properties:
    FixedVersion: ""
    InstalledVersion: v1.28.0
    URL: https://github.com/google/protobuf/issues/760
  resources:
  - kind: Pod
    name: kyverno-688464bd95-55drc
    namespace: kyverno
    uid: 24bdccbb-653a-4005-8463-cf511a919037
  result: fail
  severity: high
  source: vulnerability-operator
  timestamp:
    nanos: 728434599
    seconds: 1655564847
- category: google.golang.org/protobuf
  message: 'google.golang.org/protobuf: CVE-2021-22570'
  policy: CVE-2021-22570
  properties:
    FixedVersion: ""
    InstalledVersion: v1.28.0
    URL: https://github.com/protocolbuffers/protobuf/releases/tag/v3.15.0
  resources:
  - kind: Pod
    name: kyverno-688464bd95-55drc
    namespace: kyverno
    uid: 24bdccbb-653a-4005-8463-cf511a919037
  result: fail
  severity: high
  source: vulnerability-operator
  timestamp:
    nanos: 728434599
    seconds: 1655564847
- category: github.com/theupdateframework/go-tuf
  message: 'github.com/theupdateframework/go-tuf: GHSA-66x3-6cw3-v5gj'
  policy: GHSA-66x3-6cw3-v5gj
  properties:
    FixedVersion: 0.3.0
    InstalledVersion: v0.0.0-20220211205608-f0c3294f63b9
    URL: https://github.com/advisories/GHSA-66x3-6cw3-v5gj
  resources:
  - kind: Pod
    name: kyverno-688464bd95-55drc
    namespace: kyverno
    uid: 24bdccbb-653a-4005-8463-cf511a919037
  result: fail
  severity: high
  source: vulnerability-operator
  timestamp:
    nanos: 728434599
    seconds: 1655564847
scope:
  kind: Pod
  name: kyverno-688464bd95-55drc
  namespace: kyverno
  uid: 24bdccbb-653a-4005-8463-cf511a919037
summary:
  error: 0
  fail: 6
  pass: 0
  skip: 0
  warn: 0

Security

The docker-image is based on scratch to reduce the attack-surface and keep the image small. Furthermore the image and release-artifacts are signed with cosign and attested with provenance-files. The release-process satisfies SLSA Level 2. All of those "metadata files" are also stored in a dedicated repository ghcr.io/ckotzbauer/vulnerability-operator-metadata. Both, SLSA and the signatures are still experimental for this project. When discovering security issues please refer to the Security process.

License

Changelog

Contributing

Please refer to the Contribution guildelines.

Code of conduct

Please refer to the Conduct guildelines.

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verified publisher icon ckotzbauer

Metadata

Scans SBOMs for vulnerabilities with Grype

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