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# 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](https://gitlab.com/gitlab-org/security-products/analyzers)
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](https://gitlab.com/gitlab-org/security-products/analyzers/common).
Dependency Scanning supports the following official analyzers:
- [`bundler-audit`](https://gitlab.com/gitlab-org/security-products/analyzers/bundler-audit)
- [`gemnasium`](https://gitlab.com/gitlab-org/security-products/analyzers/gemnasium)
- [`gemnasium-maven`](https://gitlab.com/gitlab-org/security-products/analyzers/gemnasium-maven)
- [`gemnasium-python`](https://gitlab.com/gitlab-org/security-products/analyzers/gemnasium-python)
- [`retire.js`](https://gitlab.com/gitlab-org/security-products/analyzers/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`](index.md#customizing-the-dependency-scanning-settings).
### 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:
```yaml
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:
```yaml
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:
```yaml
include:
template: Dependency-Scanning.gitlab-ci.yml
variables:
DS_DEFAULT_ANALYZERS: ""
```
That's needed when one totally relies on [custom analyzers](#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:
```yaml
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).
|
