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OWASP Dependency-Check scanner reference for STO



You can scan your code repositories using OWASP Dependency-Check and ingest your scan results into Harness STO.

Important notes for running OWASP scans in STO​

  • You need to run the scan step with root access if you need to add trusted certificates to your scan images at runtime.

  • You can set up your STO scan images and pipelines to run scans as non-root and establish trust for your own proxies using custom certificates. For more information, go to Configure STO to Download Images from a Private Registry.

The following topics contain useful information for setting up scanner integrations in STO:

OWASP step configuration​

The recommended workflow is to add an OWASP step to a Security or Build stage and then configure it as described below.

Scan Mode​

  • Orchestration Configure the step to run a scan and then ingest, normalize, and deduplicate the results.

Scan Configuration​

The predefined configuration to use for the scan. All scan steps have at least one configuration.

Target​

Type​

  • Repository Scan a codebase repo.

    In most cases, you specify the codebase using a code repo connector that connects to the Git account or repository where your code is stored. For information, go to Configure codebase.

Target and variant detection​

When Auto is enabled for code repositories, the step detects these values using git:

  • To detect the target, the step runs git config --get remote.origin.url.
  • To detect the variant, the step runs git rev-parse --abbrev-ref HEAD. The default assumption is that the HEAD branch is the one you want to scan.

Note the following:

  • Auto is not available when the Scan Mode is Ingestion.
  • Auto is the default selection for new pipelines. Manual is the default for old pipelines, but you might find that neither radio button is selected in the UI.

Name​

The identifier for the target, such as codebaseAlpha or jsmith/myalphaservice. Descriptive target names make it much easier to navigate your scan data in the STO UI.

It is good practice to specify a baseline for every target.

Variant​

The identifier for the specific variant to scan. This is usually the branch name, image tag, or product version. Harness maintains a historical trend for each variant.

Workspace​

The workspace path on the pod running the scan step. The workspace path is /harness by default.

You can override this if you want to scan only a subset of the workspace. For example, suppose the pipeline publishes artifacts to a subfolder /tmp/artifacts and you want to scan these artifacts only. In this case, you can specify the workspace path as /harness/tmp/artifacts.

Ingestion File​

The path to your scan results when running an Ingestion scan, for example /shared/scan_results/myscan.latest.sarif.

  • The data file must be in a supported format for the scanner.

  • The data file must be accessible to the scan step. It's good practice to save your results files to a shared path in your stage. In the visual editor, go to the stage where you're running the scan. Then go to Overview > Shared Paths. You can also add the path to the YAML stage definition like this:

        - stage:
          spec:
            sharedPaths:
              - /shared/scan_results

Log Level​

The minimum severity of the messages you want to include in your scan logs. You can specify one of the following:

  • DEBUG
  • INFO
  • WARNING
  • ERROR

Additional CLI flags​

Use this field to run the OWASP dependency-check scan with additional CLI flags, for example:

--disableYarnAudit --log /shared/scan_logs/owasp.txt

With these flags, the scanner skips the yarn Audit Analyzer and outputs the log to a shared folder, where it can be accessed by a later step.

caution

Passing additional CLI flags is an advanced feature. Harness recommends the following best practices:

  • Test your flags and arguments thoroughly before you use them in your Harness pipelines. Some flags might not work in the context of STO.

  • Don't add flags that are already used in the default configuration of the scan step.

    To check the default configuration, go to a pipeline execution where the scan step ran with no additional flags. Check the log output for the scan step. You should see a line like this:

    Command [ scancmd -f json -o /tmp/output.json ]

    In this case, don't add -f or -o to Additional CLI flags.

Fail on Severity​

Every Custom Scan step has a Fail on Severity setting. If the scan finds any vulnerability with the specified severity level or higher, the pipeline fails automatically. You can specify one of the following:

  • CRITICAL
  • HIGH
  • MEDIUM
  • LOW
  • INFO
  • NONE — Do not fail on severity

The YAML definition looks like this: fail_on_severity : critical # | high | medium | low | info | none

Settings​

You can use this field to specify environment variables for your scanner.

Additional Configuration​

In the Additional Configuration settings, you can use the following options:

Advanced settings​

In the Advanced settings, you can use the following options:

Troubleshoot Yarn Audit Analyzer exceptions​

The full exception is: [DependencyCheck] [ERROR] Exception occurred initializing Yarn Audit Analyzer

The OWASP scan step does not include a Yarn package out of the box. Harness seeks to keep these images as small and as lightweight as possible, and to minimize the number of vulnerabilities in each image.

To scan a repository that uses Yarn or another package that isn't in the base image, create a custom OWASP scanner image with the packages you need. For more information, go to Create custom scanner images. This topic includes a step-by-step workflow for creating a custom image with OWASP, Yarn, and PNPM.

If you get this message when scanning a repo that doesn't use Yarn, there might be an errant yarn.lock file somewhere in the repo. To disable the OWASP Yarn Audit Analyzer, add the option --disableYarnAudit to Additional CLI flags in the OWASP scan step.