Detections
Analytics

6.1.4 Ensure that logging for Azure Key Vault is 'Enabled'

Information

Enable AuditEvent logging for key vault instances to ensure interactions with key vaults are logged and available.

Rationale:

Monitoring how and when key vaults are accessed, and by whom, enables an audit trail of interactions with confidential information, keys, and certificates managed by Azure Key Vault. Enabling logging for Key Vault saves information in a user provided destination of either an Azure storage account or Log Analytics workspace. The same destination can be used for collecting logs for multiple Key Vaults.

Solution

Remediate from Azure Portal

Go to Key vaults.

Select a Key vault.

Under Monitoring, select Diagnostic settings.

Click Edit setting to update an existing diagnostic setting, or Add diagnostic setting to create a new one.

If creating a new diagnostic setting, provide a name.

Configure an appropriate destination.

Under Category groups, check audit and allLogs.

Click Save.

Remediate from Azure CLI
To update an existing Diagnostic Settings

az monitor diagnostic-settings update --name '<diagnostic_setting_name>' --resource <key_vault_id>

To create a new Diagnostic Settings

az monitor diagnostic-settings create --name '<diagnostic_setting_name>' --resource <key_vault_id> --logs '[{category:audit,enabled:true},{category:allLogs,enabled:true}]' --metrics '[{category:AllMetrics,enabled:true}]' <[--event-hub <event_hub_ID> --event-hub-rule <event_hub_auth_rule_ID> | --storage-account <storage_account_ID> |--workspace <log_analytics_workspace_ID> | --marketplace-partner-id <solution_resource_ID>]>

Remediate from PowerShell
Create the Log settings object

$logSettings = @()
$logSettings += New-AzDiagnosticSettingLogSettingsObject -Enabled $true -Category audit
$logSettings += New-AzDiagnosticSettingLogSettingsObject -Enabled $true -Category allLogs

Create the Metric settings object

$metricSettings = @()
$metricSettings += New-AzDiagnosticSettingMetricSettingsObject -Enabled $true -Category AllMetrics

Create the Diagnostic Settings for each Key Vault

New-AzDiagnosticSetting -Name '<diagnostic_setting_name>' -ResourceId <key_vault_id> -Log $logSettings -Metric $metricSettings [-StorageAccountId <storage_account_ID> | -EventHubName <event_hub_name> -EventHubAuthorizationRuleId <event_hub_auth_rule_ID> | -WorkSpaceId <log analytics workspace ID> | -MarketPlacePartnerId <full resource ID for third-party solution>]

Default Value:

By default, Diagnostic AuditEvent logging is not enabled for Key Vault instances.

See Also

https://workbench.cisecurity.org/benchmarks/16820

Item Details

Category: AUDIT AND ACCOUNTABILITY

References: 800-53|AU-3, 800-53|AU-3(1), 800-53|AU-7, 800-53|AU-12, CSCv7|6.3

Plugin: microsoft_azure

Control ID: 2f146ea7a814dda92b156a85b06b88d779473cb14923077111fc85c1b297efe0