Microsoft AzureOverview
Microsoft Defender for Azure Cosmos DB scans all incoming network requests for threats to your Azure Cosmos DB resources.
Rationale
In scanning Azure Cosmos DB requests within a subscription, requests are compared to a heuristic list of potential security threats. These threats could be a result of a security breach within your services, thus scanning for them could prevent a potential security threat from being introduced.
Impact
Enabling Microsoft Defender for Azure Cosmos DB requires enabling Microsoft Defender for your subscription. Both will incur additional charges.
Remediation guidance
From Azure Console
- Open Microsoft Defender for Cloud | Environment settings
- Select a subscription
- Under
Settings, selectDefender plans - For
Azure Cosmos DB, selectOnforStatus - Select Save
Using Azure Command Line Interface
az security pricing create -n 'CosmosDbs' --tier 'Standard'
Using Azure PowerShell
Set-AzSecurityPricing -Name 'CosmosDbs' -PricingTier 'Standard'
Default Value
By default, the Microsoft Defender plan is off.
References
- https://azure.microsoft.com/en-us/pricing/details/defender-for-cloud/
- https://learn.microsoft.com/en-us/azure/defender-for-cloud/enable-enhanced-security
- https://learn.microsoft.com/en-us/azure/defender-for-cloud/alerts-overview
- https://learn.microsoft.com/en-us/security/benchmark/azure/baselines/cosmos-db-security-baseline
- https://learn.microsoft.com/en-us/azure/defender-for-cloud/quickstart-enable-database-protections
- https://learn.microsoft.com/en-us/security/benchmark/azure/security-controls-v3-logging-threat-detection#lt-1-enable-threat-detection-capabilities
Multiple Remediation Paths
Azure
SERVICE-WIDE (RECOMMENDED when many resources are affected): Assign Azure Policy initiatives at management group/subscription scope and trigger remediation tasks.
az policy assignment create --name <assignment-name> --scope /subscriptions/<subscription-id> --policy-set-definition <initiative-id>
az policy remediation create --name <remediation-name> --policy-assignment <assignment-id>
ASSET-LEVEL: Apply the resource-specific remediation steps above to the listed non-compliant resources.
PREVENTIVE: Embed Azure Policy checks into landing zones and IaC workflows to block or auto-remediate drift.
References for Service-Wide Patterns
- Azure Policy overview: https://learn.microsoft.com/en-us/azure/governance/policy/overview
- Azure Policy remediation: https://learn.microsoft.com/en-us/azure/governance/policy/how-to/remediate-resources
- Azure Policy initiative structure: https://learn.microsoft.com/en-us/azure/governance/policy/concepts/initiative-definition-structure
Operational Rollout Workflow
Use this sequence to reduce risk and avoid repeated drift.
1. Contain at Service-Wide Scope First (Recommended)
- Azure: assign policy initiatives at management group/subscription scope and run remediation tasks.
az policy assignment create --name <assignment-name> --scope /subscriptions/<subscription-id> --policy-set-definition <initiative-id>
az policy remediation create --name <remediation-name> --policy-assignment <assignment-id>
2. Remediate Existing Affected Assets
- Execute the control-specific Console/CLI steps documented above for each flagged resource.
- Prioritize internet-exposed and production assets first.
3. Validate and Prevent Recurrence
- Re-scan after each remediation batch.
- Track exceptions with owner and expiry date.
- Add preventive checks in IaC/CI pipelines.
Query logic
These are the stored checks tied to this control.
Azure Subscriptions without Microsoft Defender for Cosmos DB
Connectors
Covered asset types
Expected check: eq []
{
connectors(
where: { pricing_SOME: { name: "CosmosDbs", pricingTier: "Free" } }
) {
...AssetFragment
}
}
