Rule: Lambda functions should be configured with a dead-letter queue
Ensure Lambda functions have a dead-letter queue configured for better error handling
| Rule | Lambda functions should be configured with a dead-letter queue |
| Framework | NIST 800-53 Revision 5 |
| Severity | ✔ Medium |
Rule Description
Lambda functions should be configured with a dead-letter queue to comply with NIST 800-53 Revision 5.
A dead-letter queue is a mechanism provided by AWS Lambda that retains events that Lambda functions were unable to process successfully. By configuring a dead-letter queue, failed events are stored for further analysis and troubleshooting.
Troubleshooting Steps
1. Verify Lambda Function Configuration
- Ensure that you have the necessary permissions to manage Lambda functions.
- Log in to the AWS Management Console and navigate to the Lambda service.
- Select the desired Lambda function.
- Scroll down to the "Dead letter queue" section in the Configuration tab.
2. Create a Dead-Letter Queue
- If no dead-letter queue is configured, click on "Edit" in the "Dead letter queue" section.
- From the drop-down menu, select "Create new queue" to create a new queue to act as a dead-letter queue.
- Customize the queue settings as per your requirements, such as the queue name and retention period.
- Click "Save" to save the configuration.
3. Configure Existing Dead-Letter Queue
- If a dead-letter queue is already available, click on "Edit" in the "Dead letter queue" section.
- Select the desired dead-letter queue from the drop-down menu.
- Click "Save" to update the configuration.
Necessary Code
No code is required as this configuration is done through the AWS Management Console.
Step-by-Step Guide for Remediation
- 1.Log in to the AWS Management Console.
- 2.Navigate to the Lambda service.
- 3.Select the Lambda function that needs to be configured with a dead-letter queue.
- 4.Scroll down to the "Dead letter queue" section in the Configuration tab.
- 5.If no dead-letter queue is configured, click on "Edit".
- 6.Select "Create new queue" from the drop-down menu.
- 7.Customize the queue settings as per your requirements, and click "Save".
- 8.If a dead-letter queue is already configured, click on "Edit".
- 9.Select the desired dead-letter queue from the drop-down menu.
- 10.Click "Save" to update the configuration.
- 11.Repeat these steps for any other Lambda functions that need to be configured.
Ensure that the dead-letter queue configuration is also documented for future reference and compliance audits.