cis-gke-v170-5.1.1

DevOps & Security

Ensure Image Vulnerability Scanning is enabled (Automated)

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Server_Software/Kubernetes/CIS_GKE_Benchmark_v1.7.0/cis-gke-v170-5.1.1/SKILL.md

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5.1.1 Ensure Image Vulnerability Scanning is enabled (Automated)

Profile Applicability

Level 2

Description

Note: GCR is now deprecated, being superseded by Artifact Registry starting 15th May 2024. Runtime Vulnerability scanning is available via GKE Security Posture

Scan images stored in Google Container Registry (GCR) or Artifact Registry (AR) for vulnerabilities.

Rationale

Vulnerabilities in software packages can be exploited by malicious users to obtain unauthorized access to local cloud resources. GCR Container Analysis API or Artifact Registry Container Scanning API allow images stored in GCR or AR respectively to be scanned for known vulnerabilities.

Impact

None.

Audit

For Images Hosted in GCR:

Using Google Cloud Console:

Go to GCR by visiting https://console.cloud.google.com/gcr
Select Settings and check if Vulnerability scanning is Enabled.

Using Command Line:

gcloud services list --enabled

Ensure that the Container Registry API and Container Analysis API are listed in the output.

For Images Hosted in AR:

Using Google Cloud Console:

Go to AR by visiting https://console.cloud.google.com/artifacts
Select Settings and check if Vulnerability scanning is Enabled.

Using Command Line:

gcloud services list --enabled

Ensure that the Container Scanning API and Artifact Registry API are listed in the output.

Remediation

For Images Hosted in GCR:

Using Google Cloud Console

Go to GCR by visiting: https://console.cloud.google.com/gcr
Select Settings and, under the Vulnerability Scanning heading, click the TURN ON button.

Using Command Line

gcloud services enable containeranalysis.googleapis.com

For Images Hosted in AR:

Using Google Cloud Console

Go to GCR by visiting: https://console.cloud.google.com/artifacts
Select Settings and, under the Vulnerability Scanning heading, click the ENABLE button.

Using Command Line

gcloud services enable containerscanning.googleapis.com

Default Value

By default, GCR Container Analysis and AR Container Scanning are disabled.

References

CIS Controls

Controls Version	Control	IG 2	IG 3
v8	7.6 Perform Automated Vulnerability Scans of Externally-Exposed Enterprise Assets	x	x
v7	3 Continuous Vulnerability Management
v7	3.1 Run Automated Vulnerability Scanning Tools	x	x
v7	3.2 Perform Authenticated Vulnerability Scanning	x	x