gitlab-org--gitlab-foss/doc/user/application_security/dependency_scanning/analyzers.md

Dependency Scanning Analyzers (ULTIMATE)

Dependency Scanning 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.

Dependency Scanning supports the following official analyzers:

• bundler-audit
• gemnasium
• gemnasium-maven
• gemnasium-python
• retire.js

The analyzers are published as Docker images that Dependency Scanning will use to launch dedicated containers for each analysis.

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

Official default analyzers

Any custom change to the official analyzers can be achieved by using an environment 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 Dependency Scanning to pull my-docker-registry/gl-images/gemnasium instead of registry.gitlab.com/gitlab-org/security-products/analyzers/gemnasium. In .gitlab-ci.yml define:

include:
  template: Dependency-Scanning.gitlab-ci.yml

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

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

Selecting specific analyzers

You can select the official analyzers you want to run. Here's how to enable bundler-audit and gemnasium while disabling all the other default ones. In .gitlab-ci.yml define:

include:
  template: Dependency-Scanning.gitlab-ci.yml

variables:
  DS_DEFAULT_ANALYZERS: "bundler-audit,gemnasium"

bundler-audit runs first. When merging the reports, Dependency Scanning will remove the duplicates and will keep the bundler-audit entries.

Disabling default analyzers

Setting DS_DEFAULT_ANALYZERS to an empty string will disable all the official default analyzers. In .gitlab-ci.yml define:

include:
  template: Dependency-Scanning.gitlab-ci.yml

variables:
  DS_DEFAULT_ANALYZERS: ""

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

Custom analyzers

You can provide your own analyzers as a comma separated list of Docker images. Here's how to add analyzers/nugget and analyzers/perl to the default images. In .gitlab-ci.yml define:

include:
  template: Dependency-Scanning.gitlab-ci.yml

variables:
  DS_ANALYZER_IMAGES: "my-docker-registry/analyzers/nugget,amy-docker-registry/nalyzers/perl"

The values must be the full path to the container registry images, like what you would feed to the docker pull command.

NOTE: Note: This configuration doesn't benefit from the integrated detection step. Dependency Scanning has to fetch and spawn each Docker image to establish whether the custom analyzer can scan the source code.

Analyzers data

The following table lists the data available for each official analyzer.

Property \ Tool	Gemnasium	bundler-audit	Retire.js
Severity	𐄂	✓	✓
Title	✓	✓	✓
File	✓	⚠	✓
Start line	𐄂	𐄂	𐄂
End line	𐄂	𐄂	𐄂
External ID (e.g., CVE)	✓	✓	⚠
URLs	✓	✓	✓
Internal doc/explanation	✓	𐄂	𐄂
Solution	✓	✓	𐄂
Confidence	𐄂	𐄂	𐄂
Affected item (e.g. class or package)	✓	✓	✓
Source code extract	𐄂	𐄂	𐄂
Internal ID	✓	𐄂	𐄂
Date	✓	𐄂	𐄂
Credits	✓	𐄂	𐄂

• ✓ => we have that data
• ⚠ => we have that data but it's partially reliable, or we need to extract that data 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 (e.g., severity, confidence, etc).