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Question 115 - DVA-C02 discussion

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A developer has code that is stored in an Amazon S3 bucket. The code must be deployed as an AWS Lambda function across multiple accounts in the same AWS Region as the S3 bucket an AWS CloudPormation template that runs for each account will deploy the Lambda function.

What is the MOST secure way to allow CloudFormaton to access the Lambda Code in the S3 bucket?

A.
Grant the CloudFormation service role the S3 ListBucket and GetObject permissions. Add a bucket policy to Amazon S3 with the principal of "AWS" (account numbers)
Answers
A.
Grant the CloudFormation service role the S3 ListBucket and GetObject permissions. Add a bucket policy to Amazon S3 with the principal of "AWS" (account numbers)
B.
Grant the CloudFormation service row the S3 GetObfect permission. Add a Bucket policy to Amazon S3 with the principal of "'"
Answers
B.
Grant the CloudFormation service row the S3 GetObfect permission. Add a Bucket policy to Amazon S3 with the principal of "'"
C.
Use a service-based link to grant the Lambda function the S3 ListBucket and GetObject permissions by explicitly adding the S3 bucket's account number in the resource.
Answers
C.
Use a service-based link to grant the Lambda function the S3 ListBucket and GetObject permissions by explicitly adding the S3 bucket's account number in the resource.
D.
Use a service-based link to grant the Lambda function the S3 GetObject permission Add a resource of "** to allow access to the S3 bucket.
Answers
D.
Use a service-based link to grant the Lambda function the S3 GetObject permission Add a resource of "** to allow access to the S3 bucket.
Suggested answer: B

Explanation:

This solution allows the CloudFormation service role to access the S3 bucket from any account, as long as it has the S3 GetObject permission. The bucket policy grants access to any principal with the GetObject permission, which is the least privilege needed to deploy the Lambda code. This is more secure than granting ListBucket permission, which is not required for deploying Lambda code, or using a service-based link, which is not supported for Lambda functions.

Reference: AWS CloudFormation Service Role, Using AWS Lambda with Amazon S3

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asked 16/09/2024
Nivenl Surnder
33 questions
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