Analyze and fix container images
Snyk then scans your Project for vulnerabilities and imports a snapshot of your Project. Based on your configuration, daily or weekly, Snyk regularly scans the image snapshot dependencies, which in turn refers to its tag. Based on your configuration, Snyk sends you an update by email or Slack when any new vulnerabilities are identified.
If the tag for an image changes and the original tag is used for a different image, Snyk continues to scan the image associated with the original tag, meaning Snyk scans the new image on recurring tests. If you want to continue testing an image with a different tag, import the relevant tag.
Depending on how you import images (Snyk Container CLI, Container Registry integration, or Kubernetes integration), Projects are grouped differently in the Projects tab.
Snyk groups images and the applications found in the image. However, Snyk CLI does not use image tags for grouping, so Snyk does not do sub-grouping for the different image tags. Thus images from the same repository with different image tags are all grouped.
Images with different image tags grouped in one group
If you import images with container registry integration, in the Projects tab, Snyk performs sub-grouping per image tag for each image name.
Images with different image tags gropued in sub-groups
If you import images into Snyk with the Kubernetes integration, the top clickable item is the workload in the cluster. The grouping is based on the image in the workload without sub-grouping per image tag.
Grouping of images imported with the Kubernetes integration
On the Projects page, if the Project is imported from a registry integration, it is marked with the relevant registry icon; if the Project is imported from the CLI, it is marked with a CLI icon.
You can filter for all container Projects, as shown in the following example:
Snyk Projects list with filters
When you open any container Project, the resulting analysis and fix advice appear in the Snyk Web UI:
Analysis and fix advice for a Project
The following information is displayed:
- Project summary: general project details, including these unique details:
- Image ID - derived from the container image digest
- Image tag
- Base Image
- Total dependencies with known vulnerabilities and the total number of vulnerabilities
- Fix advice: If you included your Dockerfile for monitoring, available actionable fix advice is displayed. To view all advice, click the Show more upgrade types link.
The Issues tab provides a list of vulnerabilities, including origins, paths, and an overview of the vulnerabilities.
You can use filters. When viewing a container Project, you can use the filters available for all supported Project types, as well as the following filters:
- OS BINARIES - to see a specific binary or OS packages for binaries and packages containing issues
- IMAGE LAYER - to see Dockerfile instructions. If you attach your Dockerfile, you can filter to view issues associated only with the base image view Dockerfile-related advice (user instruction), or both.
Filters for binaries and images
If there is only one category of issues in your container, for example, Node binary vulnerabilities or OS packages, this filter does not appear. If there is no Dockerfile attached for additional advice, the Dockerfile instruction filter does not appear.
The Dependencies tab provides a tree view of the package hierarchy inside the image.
Recommendations for upgrading the base image refer to:
- Minor upgrades: the safest and best minor upgrade available
- Major upgrades: an option for a major upgrade that will reduce more vulnerabilities but with greater risk
- Alternative upgrades: viable image options for replacing your current base image with possible different base images that provide the least amount of vulnerabilities.
- Recommendation to rebuild your base image if it is outdated.
Recommendations for upgrading the base image include:
- the name of the recommended base image version
- the number of vulnerabilities existent in the recommended upgrade
- a summary of the vulnerability severities accordingly.
Recommendations for upgrading the base image