Trivy SBOM

What is Trivy SBOM?

Trivy (tri pronounced like trigger, vy pronounced like envy) is a simple and comprehensive vulnerability scanner for containers and other artifacts. A software vulnerability is a glitch, flaw, or weakness present in the software or in an Operating System. Trivy detects vulnerabilities of OS packages (Alpine, RHEL, CentOS, etc.) and application dependencies (Bundler, Composer, npm, yarn, etc.). Trivy is easy to use. Just install the binary, and you're ready to scan. All you need to do for scanning is to specify a target such as an image name of the container.

To learn more about the Trivy scanner itself visit Trivy's GitHub Repository.

This chart uses Trivy's SBOM support to generate Software Bills of Material in CycloneDX format for container images. You can use the Dependency-Track hook to send the generated SBOMs to an instance of Dependency-Track to manage them there.

Deployment

The trivy-sbom chart can be deployed via helm:

# Install HelmChart (use -n to configure another namespace)
helm upgrade --install trivy-sbom oci://ghcr.io/securecodebox/helm/trivy-sbom

Scanner Configuration

The following SBOM generation configuration example is based on the Trivy Documentation, please take a look at the original documentation for more configuration examples.

Currently we support the following scanType, corresponding to the trivy scanning modes:

• scanType: "trivy-sbom-image"
  • parameters: [YOUR_IMAGE_NAME]

Simply specify an image name (and a tag) when you use the scanType trivy-sbom-image. A complete example is listed below in our example docs section.

Requirements

Kubernetes: >=v1.11.0-0

Values

Key	Type	Default	Description
cascadingRules.enabled	bool	false	Enables or disables the installation of the default cascading rules for this scanner
imagePullSecrets	list	[]	Define imagePullSecrets when a private registry is used (see: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/)
parser.affinity	object	{}	Optional affinity settings that control how the parser job is scheduled (see: https://kubernetes.io/docs/tasks/configure-pod-container/assign-pods-nodes-using-node-affinity/)
parser.env	list	[]	Optional environment variables mapped into each parseJob (see: https://kubernetes.io/docs/tasks/inject-data-application/define-environment-variable-container/)
parser.image.pullPolicy	string	"IfNotPresent"	Image pull policy. One of Always, Never, IfNotPresent. Defaults to Always if :latest tag is specified, or IfNotPresent otherwise. More info: https://kubernetes.io/docs/concepts/containers/images#updating-images
parser.image.repository	string	"docker.io/securecodebox/parser-trivy-sbom"	Parser image repository
parser.image.tag	string	defaults to the charts version	Parser image tag
parser.nodeSelector	object	{}	Optional nodeSelector settings that control how the scanner job is scheduled (see: https://kubernetes.io/docs/tasks/configure-pod-container/assign-pods-nodes/)
parser.resources	object	{ requests: { cpu: "200m", memory: "100Mi" }, limits: { cpu: "400m", memory: "200Mi" } }	Optional resources lets you control resource limits and requests for the parser container. See https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
parser.scopeLimiterAliases	object	{}	Optional finding aliases to be used in the scopeLimiter.
parser.tolerations	list	[]	Optional tolerations settings that control how the parser job is scheduled (see: https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/)
parser.ttlSecondsAfterFinished	string	nil	seconds after which the Kubernetes job for the parser will be deleted. Requires the Kubernetes TTLAfterFinished controller: https://kubernetes.io/docs/concepts/workloads/controllers/ttlafterfinished/
scanner.activeDeadlineSeconds	string	nil	There are situations where you want to fail a scan Job after some amount of time. To do so, set activeDeadlineSeconds to define an active deadline (in seconds) when considering a scan Job as failed. (see: https://kubernetes.io/docs/concepts/workloads/controllers/job/#job-termination-and-cleanup)
scanner.affinity	object	{}	Optional affinity settings that control how the scanner job is scheduled (see: https://kubernetes.io/docs/tasks/configure-pod-container/assign-pods-nodes-using-node-affinity/)
scanner.backoffLimit	int	3	There are situations where you want to fail a scan Job after some amount of retries due to a logical error in configuration etc. To do so, set backoffLimit to specify the number of retries before considering a scan Job as failed. (see: https://kubernetes.io/docs/concepts/workloads/controllers/job/#pod-backoff-failure-policy)
scanner.env	list	[]	Optional environment variables mapped into each scanJob (see: https://kubernetes.io/docs/tasks/inject-data-application/define-environment-variable-container/)
scanner.extraContainers	list	[]	Optional additional Containers started with each scanJob (see: https://kubernetes.io/docs/concepts/workloads/pods/init-containers/)
scanner.extraVolumeMounts	list	[]	Optional VolumeMounts mapped into each scanJob (see: https://kubernetes.io/docs/concepts/storage/volumes/)
scanner.extraVolumes	list	[]	Optional Volumes mapped into each scanJob (see: https://kubernetes.io/docs/concepts/storage/volumes/)
scanner.image.pullPolicy	string	"IfNotPresent"	Image pull policy. One of Always, Never, IfNotPresent. Defaults to Always if :latest tag is specified, or IfNotPresent otherwise. More info: https://kubernetes.io/docs/concepts/containers/images#updating-images
scanner.image.repository	string	"docker.io/aquasec/trivy"	Container Image to run the scan
scanner.image.tag	string	nil	defaults to the charts appVersion
scanner.nameAppend	string	nil	append a string to the default scantype name.
scanner.nodeSelector	object	{}	Optional nodeSelector settings that control how the scanner job is scheduled (see: https://kubernetes.io/docs/tasks/configure-pod-container/assign-pods-nodes/)
scanner.podSecurityContext	object	{}	Optional securityContext set on scanner pod (see: https://kubernetes.io/docs/tasks/configure-pod-container/security-context/)
scanner.resources	object	{}	CPU/memory resource requests/limits (see: https://kubernetes.io/docs/tasks/configure-pod-container/assign-memory-resource/, https://kubernetes.io/docs/tasks/configure-pod-container/assign-cpu-resource/)
scanner.securityContext	object	{"allowPrivilegeEscalation":false,"capabilities":{"drop":["all"]},"privileged":false,"readOnlyRootFilesystem":false,"runAsNonRoot":false}	Optional securityContext set on scanner container (see: https://kubernetes.io/docs/tasks/configure-pod-container/security-context/)
scanner.securityContext.allowPrivilegeEscalation	bool	false	Ensure that users privileges cannot be escalated
scanner.securityContext.capabilities.drop[0]	string	"all"	This drops all linux privileges from the container.
scanner.securityContext.privileged	bool	false	Ensures that the scanner container is not run in privileged mode
scanner.securityContext.readOnlyRootFilesystem	bool	false	Prevents write access to the containers file system
scanner.securityContext.runAsNonRoot	bool	false	Enforces that the scanner image is run as a non root user
scanner.suspend	bool	false	if set to true the scan job will be suspended after creation. You can then resume the job using kubectl resume <jobname> or using a job scheduler like kueue
scanner.tolerations	list	[]	Optional tolerations settings that control how the scanner job is scheduled (see: https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/)
scanner.ttlSecondsAfterFinished	string	nil	seconds after which the Kubernetes job for the scanner will be deleted. Requires the Kubernetes TTLAfterFinished controller: https://kubernetes.io/docs/concepts/workloads/controllers/ttlafterfinished/

License

Code of secureCodeBox is licensed under the Apache License 2.0.

CPU architectures

The scanner is currently supported for these CPU architectures:

• linux/amd64
• linux/arm64
• linux/ppc64le
• linux/s390x

Examples

image-juice-shop

This example shows how to generate a CycloneDX SBOM from a container image using the trivy image scanner with CycloneDX output with the secureCodeBox.

Scan

# SPDX-FileCopyrightText: the secureCodeBox authors
#
# SPDX-License-Identifier: Apache-2.0

apiVersion: "execution.securecodebox.io/v1"
kind: Scan
metadata:
  name: "trivy-sbom-image-juice-shop"
spec:
  scanType: "trivy-sbom-image"
  parameters:
    - "bkimminich/juice-shop:v15.0.0"