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

     1  package elb
     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/providers/aws/elb"
     7  	"github.com/khulnasoft-lab/defsec/pkg/scan"
     8  	"github.com/khulnasoft-lab/defsec/pkg/severity"
     9  	"github.com/khulnasoft-lab/defsec/pkg/state"
    10  )
    11  
    12  var CheckAlbNotPublic = rules.Register(
    13  	scan.Rule{
    14  		AVDID:       "AVD-AWS-0053",
    15  		Provider:    providers.AWSProvider,
    16  		Service:     "elb",
    17  		ShortCode:   "alb-not-public",
    18  		Summary:     "Load balancer is exposed to the internet.",
    19  		Impact:      "The load balancer is exposed on the internet",
    20  		Resolution:  "Switch to an internal load balancer or add a terrasec ignore",
    21  		Explanation: `There are many scenarios in which you would want to expose a load balancer to the wider internet, but this check exists as a warning to prevent accidental exposure of internal assets. You should ensure that this resource should be exposed publicly.`,
    22  		Links:       []string{},
    23  		Terraform: &scan.EngineMetadata{
    24  			GoodExamples:        terraformAlbNotPublicGoodExamples,
    25  			BadExamples:         terraformAlbNotPublicBadExamples,
    26  			Links:               terraformAlbNotPublicLinks,
    27  			RemediationMarkdown: terraformAlbNotPublicRemediationMarkdown,
    28  		},
    29  		Severity: severity.High,
    30  	},
    31  	func(s *state.State) (results scan.Results) {
    32  		for _, lb := range s.AWS.ELB.LoadBalancers {
    33  			if lb.Metadata.IsUnmanaged() || lb.Type.EqualTo(elb.TypeGateway) {
    34  				continue
    35  			}
    36  			if lb.Internal.IsFalse() {
    37  				results.Add(
    38  					"Load balancer is exposed publicly.",
    39  					lb.Internal,
    40  				)
    41  			} else {
    42  				results.AddPassed(&lb)
    43  			}
    44  		}
    45  		return
    46  	},
    47  )