SAST Analyzers (FREE)

Moved from GitLab Ultimate to GitLab Free in 13.3.

SAST relies on underlying third party tools that are wrapped into what we call "Analyzers". An analyzer is a dedicated project that wraps a particular tool to:

• Expose its detection logic.
• Handle its execution.
• Convert its output to the common format.

This is achieved by implementing the common API.

SAST supports the following official analyzers:

• bandit (Bandit)
• brakeman (Brakeman)
• eslint (ESLint (JavaScript and React))
• flawfinder (Flawfinder)
• gosec (Gosec)
• kubesec (Kubesec)
• mobsf (MobSF (beta))
• nodejs-scan (NodeJsScan)
• phpcs-security-audit (PHP CS security-audit)
• pmd-apex (PMD (Apex only))
• security-code-scan (Security Code Scan (.NET))
• semgrep (Semgrep)
• sobelow (Sobelow (Elixir Phoenix))
• spotbugs (SpotBugs with the Find Sec Bugs plugin (Ant, Gradle and wrapper, Grails, Maven and wrapper, SBT))

The analyzers are published as Docker images that SAST uses to launch dedicated containers for each analysis.

SAST is pre-configured with a set of default images that are maintained by GitLab, but users can also integrate their own custom images.

SAST analyzer features

For an analyzer to be considered Generally Available, it is expected to minimally support the following features:

• Customizable configuration
• Customizable rulesets
• Scan projects
• Multi-project support
• Offline support
• Emits JSON report format
• SELinux support

Official default analyzers

Any custom change to the official analyzers can be achieved by using a CI/CD variable in your .gitlab-ci.yml.

Using a custom Docker mirror

You can switch to a custom Docker registry that provides the official analyzer images under a different prefix. For instance, the following instructs SAST to pull my-docker-registry/gl-images/sast/bandit instead of registry.gitlab.com/security-products/sast/bandit. In .gitlab-ci.yml define:

include:
  - template: Security/SAST.gitlab-ci.yml

variables:
  SECURE_ANALYZERS_PREFIX: my-docker-registry/gl-images

This configuration requires that your custom registry provides images for all the official analyzers.

Disabling all default analyzers

Setting SAST_DISABLED to true disables all the official default analyzers. In .gitlab-ci.yml define:

include:
  - template: Security/SAST.gitlab-ci.yml

variables:
  SAST_DISABLED: true

That's needed when one totally relies on custom analyzers.

Disabling specific default analyzers

Set SAST_EXCLUDED_ANALYZERS to a comma-delimited string that includes the official default analyzers that you want to avoid running. In .gitlab-ci.yml define the following to prevent the eslint analyzer from running:

include:
  - template: Security/SAST.gitlab-ci.yml

variables:
  SAST_EXCLUDED_ANALYZERS: "eslint"

Post Analyzers (ULTIMATE)

While analyzers are thin wrappers for executing scanners, post analyzers work to enrich the data generated within our reports.

GitLab SAST post analyzers never modify report contents directly but work by augmenting results with additional properties (such as CWEs), location tracking fields, and a means of identifying false positives or insignificant findings.

The implementation of post analyzers is determined by feature availability tiers, where simple data enrichment may occur within our free tier and most advanced processing is split into separate binaries or pipeline jobs.

Custom Analyzers

You can provide your own analyzers by defining CI jobs in your CI configuration. For consistency, you should suffix your custom SAST jobs with -sast. Here's how to add a scanning job that's based on the Docker image my-docker-registry/analyzers/csharp and generates a SAST report gl-sast-report.json when /analyzer run is executed. Define the following in .gitlab-ci.yml:

csharp-sast:
  image:
    name: "my-docker-registry/analyzers/csharp"
  script:
    - /analyzer run
  artifacts:
    reports:
      sast: gl-sast-report.json

The Security Scanner Integration documentation explains how to integrate custom security scanners into GitLab.

Analyzers Data

• ✓ => we have that data
• ⚠ => we have that data but it's partially reliable, or we need to extract it from unstructured content
• ✗ => we don't have that data or it would need to develop specific or inefficient/unreliable logic to obtain it.

The values provided by these tools are heterogeneous so they are sometimes normalized into common values (for example, severity, confidence, and so on).