github.com/khulnasoft-lab/defsec@v1.0.5-0.20230827010352-5e9f46893d95/rules/cloud/policies/azure/container/limit_authorized_ips.go (about)

     1  package container
     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 CheckLimitAuthorizedIps = rules.Register(
    12  	scan.Rule{
    13  		AVDID:       "AVD-AZU-0041",
    14  		Provider:    providers.AzureProvider,
    15  		Service:     "container",
    16  		ShortCode:   "limit-authorized-ips",
    17  		Summary:     "Ensure AKS has an API Server Authorized IP Ranges enabled",
    18  		Impact:      "Any IP can interact with the API server",
    19  		Resolution:  "Limit the access to the API server to a limited IP range",
    20  		Explanation: `The API server is the central way to interact with and manage a cluster. To improve cluster security and minimize attacks, the API server should only be accessible from a limited set of IP address ranges.`,
    21  		Links: []string{
    22  			"https://docs.microsoft.com/en-us/azure/aks/api-server-authorized-ip-ranges",
    23  		},
    24  		Terraform: &scan.EngineMetadata{
    25  			GoodExamples:        terraformLimitAuthorizedIpsGoodExamples,
    26  			BadExamples:         terraformLimitAuthorizedIpsBadExamples,
    27  			Links:               terraformLimitAuthorizedIpsLinks,
    28  			RemediationMarkdown: terraformLimitAuthorizedIpsRemediationMarkdown,
    29  		},
    30  		Severity: severity.Critical,
    31  	},
    32  	func(s *state.State) (results scan.Results) {
    33  		for _, cluster := range s.Azure.Container.KubernetesClusters {
    34  			if cluster.Metadata.IsUnmanaged() {
    35  				continue
    36  			}
    37  			if cluster.EnablePrivateCluster.IsTrue() {
    38  				continue
    39  			}
    40  			if len(cluster.APIServerAuthorizedIPRanges) == 0 {
    41  				results.Add(
    42  					"Cluster does not limit API access to specific IP addresses.",
    43  					cluster.EnablePrivateCluster,
    44  				)
    45  			} else {
    46  				results.AddPassed(&cluster)
    47  			}
    48  		}
    49  		return
    50  	},
    51  )