github.com/khulnasoft-lab/defsec@v1.0.5-0.20230827010352-5e9f46893d95/rules/cloud/policies/aws/ecr/enforce_immutable_repository.go (about)

     1  package ecr
     2  
     3  import (
     4  	"github.com/khulnasoft-lab/defsec/internal/rules"
     5  	"github.com/khulnasoft-lab/defsec/pkg/providers"
     6  	"github.com/khulnasoft-lab/defsec/pkg/scan"
     7  	"github.com/khulnasoft-lab/defsec/pkg/severity"
     8  	"github.com/khulnasoft-lab/defsec/pkg/state"
     9  )
    10  
    11  var CheckEnforceImmutableRepository = rules.Register(
    12  	scan.Rule{
    13  		AVDID:      "AVD-AWS-0031",
    14  		Provider:   providers.AWSProvider,
    15  		Service:    "ecr",
    16  		ShortCode:  "enforce-immutable-repository",
    17  		Summary:    "ECR images tags shouldn't be mutable.",
    18  		Impact:     "Image tags could be overwritten with compromised images",
    19  		Resolution: "Only use immutable images in ECR",
    20  		Explanation: `ECR images should be set to IMMUTABLE to prevent code injection through image mutation.
    21  
    22  This can be done by setting <code>image_tab_mutability</code> to <code>IMMUTABLE</code>`,
    23  		Links: []string{
    24  			"https://sysdig.com/blog/toctou-tag-mutability/",
    25  		},
    26  		Terraform: &scan.EngineMetadata{
    27  			GoodExamples:        terraformEnforceImmutableRepositoryGoodExamples,
    28  			BadExamples:         terraformEnforceImmutableRepositoryBadExamples,
    29  			Links:               terraformEnforceImmutableRepositoryLinks,
    30  			RemediationMarkdown: terraformEnforceImmutableRepositoryRemediationMarkdown,
    31  		},
    32  		CloudFormation: &scan.EngineMetadata{
    33  			GoodExamples:        cloudFormationEnforceImmutableRepositoryGoodExamples,
    34  			BadExamples:         cloudFormationEnforceImmutableRepositoryBadExamples,
    35  			Links:               cloudFormationEnforceImmutableRepositoryLinks,
    36  			RemediationMarkdown: cloudFormationEnforceImmutableRepositoryRemediationMarkdown,
    37  		},
    38  		Severity: severity.High,
    39  	},
    40  	func(s *state.State) (results scan.Results) {
    41  		for _, repo := range s.AWS.ECR.Repositories {
    42  			if repo.ImageTagsImmutable.IsFalse() {
    43  				results.Add(
    44  					"Repository tags are mutable.",
    45  					repo.ImageTagsImmutable,
    46  				)
    47  			} else {
    48  				results.AddPassed(&repo)
    49  			}
    50  		}
    51  		return
    52  	},
    53  )