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Cis Azure Foundations 9.3.7

DevOps & Security
cis-azure-foundations-9.3.7

Cis Azure Foundations 9.3.7 is an Agent Skill for devops & security published in the CyberStrikeus/CyberStrike repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.

Ensure 'Cross Tenant Replication' is not enabled

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How to use this skill

Bring this guide into your coding agent with a prompt tailored to the tool you use.

  1. Open your project in Codex.
  2. Copy and paste the prompt below.
  3. Review files and risks before approving any action.
Prompt to paste
Inspect the Agent Skill at https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Cloud_Providers/Microsoft_Azure/CIS_Microsoft_Azure_Foundations_Benchmark_v5.0.0/cis-azure-foundations-9.3.7/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/cis-azure-foundations-9-3-7, but wait for my approval before writing files or running scripts.

Copying this prompt does not install or run the skill. Review third-party files before use.

Ensure 'Cross Tenant Replication' is not enabled

Description

Cross Tenant Replication in Azure allows data to be replicated across multiple Azure tenants. While this feature can be beneficial for data sharing and availability, it also poses a significant security risk if not properly managed. Unauthorized data access, data leakage, and compliance violations are potential risks. Disabling Cross Tenant Replication ensures that data is not inadvertently replicated across different tenant boundaries without explicit authorization.

Rationale

Disabling Cross Tenant Replication minimizes the risk of unauthorized data access and ensures that data governance policies are strictly adhered to. This control is especially critical for organizations with stringent data security and privacy requirements, as it prevents the accidental sharing of sensitive information.

Impact

Disabling Cross Tenant Replication may affect data availability and sharing across different Azure tenants. Ensure that this change aligns with your organizational data sharing and availability requirements.

Audit Procedure

Audit from Azure Portal

  1. Go to Storage Accounts.
  2. For each storage account, under Data management, click Object replication.
  3. Click Advanced settings.
  4. Ensure Allow cross-tenant replication is not checked.

Audit from Azure CLI

az storage account list --query "[*].[name,allowCrossTenantReplication]"

The value of false should be returned for each storage account listed.

Expected Result

allowCrossTenantReplication should be false for all storage accounts.

Remediation

Remediate from Azure Portal

  1. Go to Storage Accounts.
  2. For each storage account, under Data management, click Object replication.
  3. Click Advanced settings.
  4. Uncheck Allow cross-tenant replication.
  5. Click OK.

Remediate from Azure CLI

Replace the information within <> with appropriate values:

az storage account update --name <storageAccountName> --resource-group <resourceGroupName> --allow-cross-tenant-replication false

Default Value

For new storage accounts created after Dec 15, 2023 cross tenant replication is not enabled.

References

  1. https://learn.microsoft.com/en-us/azure/storage/blobs/object-replication-prevent-cross-tenant-policies

Profile

Level 1