Trivy supports two types of Go scanning, Go Modules and binaries built by Go.
The following scanners are supported.
The table below provides an outline of the features Trivy offers.
Trivy scans only dependencies of the Go project. Let's say you scan the Docker binary, Trivy doesn't detect vulnerabilities of Docker itself. Also, when you scan go.mod in Kubernetes, the Kubernetes vulnerabilities will not be found.
Depending on Go versions, the required files are different.
In Go 1.17+ projects, Trivy uses
go.mod for direct/indirect dependencies.
On the other hand, it uses
go.mod for direct dependencies and
go.sum for indirect dependencies in Go 1.16 or less.
Go 1.17+ holds actually needed indirect dependencies in
go.mod, and it reduces false detection.
go.sum in Go 1.16 or less contains all indirect dependencies that are even not needed for compiling.
If you want to have better detection, please consider updating the Go version in your project.
The Go version doesn't mean your CLI version, but the Go version in your go.mod.
To update the Go version in your project, you need to run the following command.
$ go mod tidy -go=1.18
To identify licenses and dependency relationships, you need to download modules to local cache beforehand,
go mod download,
go mod tidy, etc.
$GOPATH/pkg/mod and collects those extra information.
Trivy scans binaries built by Go. If there is a Go binary in your container image, Trivy automatically finds and scans it.
Also, you can scan your local binaries.
$ trivy fs ./your_binary
It doesn't work with UPX-compressed binaries.