elasticache

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• Variables

Variables

var CheckAddDescriptionForSecurityGroup = rules.Register(
	scan.Rule{
		AVDID:      "AVD-AWS-0049",
		Provider:   providers.AWSProvider,
		Service:    "elasticache",
		ShortCode:  "add-description-for-security-group",
		Summary:    "Missing description for security group/security group rule.",
		Impact:     "Descriptions provide context for the firewall rule reasons",
		Resolution: "Add descriptions for all security groups and rules",
		Explanation: `Security groups and security group rules should include a description for auditing purposes.

Simplifies auditing, debugging, and managing security groups.`,
		Links: []string{
			"https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/SecurityGroups.Creating.html",
		},
		Terraform: &scan.EngineMetadata{
			GoodExamples:        terraformAddDescriptionForSecurityGroupGoodExamples,
			BadExamples:         terraformAddDescriptionForSecurityGroupBadExamples,
			Links:               terraformAddDescriptionForSecurityGroupLinks,
			RemediationMarkdown: terraformAddDescriptionForSecurityGroupRemediationMarkdown,
		},
		CloudFormation: &scan.EngineMetadata{
			GoodExamples:        cloudFormationAddDescriptionForSecurityGroupGoodExamples,
			BadExamples:         cloudFormationAddDescriptionForSecurityGroupBadExamples,
			Links:               cloudFormationAddDescriptionForSecurityGroupLinks,
			RemediationMarkdown: cloudFormationAddDescriptionForSecurityGroupRemediationMarkdown,
		},
		Severity: severity.Low,
	},
	func(s *state.State) (results scan.Results) {
		for _, sg := range s.AWS.ElastiCache.SecurityGroups {
			if sg.Description.IsEmpty() {
				results.Add(
					"Security group does not have a description.",
					sg.Description,
				)
			} else {
				results.AddPassed(&sg)
			}
		}
		return
	},
)

var CheckEnableAtRestEncryption = rules.Register(
	scan.Rule{
		AVDID:       "AVD-AWS-0045",
		Provider:    providers.AWSProvider,
		Service:     "elasticache",
		ShortCode:   "enable-at-rest-encryption",
		Summary:     "Elasticache Replication Group stores unencrypted data at-rest.",
		Impact:      "At-rest data in the Replication Group could be compromised if accessed.",
		Resolution:  "Enable at-rest encryption for replication group",
		Explanation: `Data stored within an Elasticache replication node should be encrypted to ensure sensitive data is kept private.`,
		Links: []string{
			"https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/at-rest-encryption.html",
		},
		Terraform: &scan.EngineMetadata{
			GoodExamples:        terraformEnableAtRestEncryptionGoodExamples,
			BadExamples:         terraformEnableAtRestEncryptionBadExamples,
			Links:               terraformEnableAtRestEncryptionLinks,
			RemediationMarkdown: terraformEnableAtRestEncryptionRemediationMarkdown,
		},
		Severity: severity.High,
	},
	func(s *state.State) (results scan.Results) {
		for _, group := range s.AWS.ElastiCache.ReplicationGroups {
			if group.AtRestEncryptionEnabled.IsFalse() {
				results.Add(
					"Replication group does not have at-rest encryption enabled.",
					group.AtRestEncryptionEnabled,
				)
			} else {
				results.AddPassed(&group)
			}
		}
		return
	},
)

var CheckEnableBackupRetention = rules.Register(
	scan.Rule{
		AVDID:       "AVD-AWS-0050",
		Provider:    providers.AWSProvider,
		Service:     "elasticache",
		ShortCode:   "enable-backup-retention",
		Summary:     "Redis cluster should have backup retention turned on",
		Impact:      "Without backups of the redis cluster recovery is made difficult",
		Resolution:  "Configure snapshot retention for redis cluster",
		Explanation: `Redis clusters should have a snapshot retention time to ensure that they are backed up and can be restored if required.`,
		Links: []string{
			"https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/backups-automatic.html",
		},
		Terraform: &scan.EngineMetadata{
			GoodExamples:        terraformEnableBackupRetentionGoodExamples,
			BadExamples:         terraformEnableBackupRetentionBadExamples,
			Links:               terraformEnableBackupRetentionLinks,
			RemediationMarkdown: terraformEnableBackupRetentionRemediationMarkdown,
		},
		CloudFormation: &scan.EngineMetadata{
			GoodExamples:        cloudFormationEnableBackupRetentionGoodExamples,
			BadExamples:         cloudFormationEnableBackupRetentionBadExamples,
			Links:               cloudFormationEnableBackupRetentionLinks,
			RemediationMarkdown: cloudFormationEnableBackupRetentionRemediationMarkdown,
		},
		Severity: severity.Medium,
	},
	func(s *state.State) (results scan.Results) {
		for _, cluster := range s.AWS.ElastiCache.Clusters {
			if !cluster.Engine.EqualTo("redis") {
				continue
			}

			if cluster.NodeType.EqualTo("cache.t1.micro") {
				continue
			}

			if cluster.SnapshotRetentionLimit.EqualTo(0) {
				results.Add(
					"Cluster snapshot retention is not enabled.",
					cluster.SnapshotRetentionLimit,
				)
			} else {
				results.AddPassed(&cluster)
			}
		}
		return
	},
)

var CheckEnableInTransitEncryption = rules.Register(
	scan.Rule{
		AVDID:       "AVD-AWS-0051",
		Provider:    providers.AWSProvider,
		Service:     "elasticache",
		ShortCode:   "enable-in-transit-encryption",
		Summary:     "Elasticache Replication Group uses unencrypted traffic.",
		Impact:      "In transit data in the Replication Group could be read if intercepted",
		Resolution:  "Enable in transit encryption for replication group",
		Explanation: `Traffic flowing between Elasticache replication nodes should be encrypted to ensure sensitive data is kept private.`,
		Links: []string{
			"https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/in-transit-encryption.html",
		},
		Terraform: &scan.EngineMetadata{
			GoodExamples:        terraformEnableInTransitEncryptionGoodExamples,
			BadExamples:         terraformEnableInTransitEncryptionBadExamples,
			Links:               terraformEnableInTransitEncryptionLinks,
			RemediationMarkdown: terraformEnableInTransitEncryptionRemediationMarkdown,
		},
		CloudFormation: &scan.EngineMetadata{
			GoodExamples:        cloudFormationEnableInTransitEncryptionGoodExamples,
			BadExamples:         cloudFormationEnableInTransitEncryptionBadExamples,
			Links:               cloudFormationEnableInTransitEncryptionLinks,
			RemediationMarkdown: cloudFormationEnableInTransitEncryptionRemediationMarkdown,
		},
		Severity: severity.High,
	},
	func(s *state.State) (results scan.Results) {
		for _, group := range s.AWS.ElastiCache.ReplicationGroups {
			if group.TransitEncryptionEnabled.IsFalse() {
				results.Add(
					"Replication group does not have transit encryption enabled.",
					group.TransitEncryptionEnabled,
				)
			} else {
				results.AddPassed(&group)
			}
		}
		return
	},
)