Amazon Exam SCS-C01 Topic 2 Question 65 Discussion

Actual exam question for Amazon's SCS-C01 exam

Question #: 65
Topic #: 2

A developer has created an AWS Lambda function in a company's development account. The Lambda function requires the use of an AWS Key Management Service (AWS KMS) customer managed key that exists in a security account that the company's security team controls. The developer obtains the ARN of the KMS key from a previous Lambda function in the development account. The previous Lambda function had been working properly with the KMS key.

When the developer uses the ARN and tests the new Lambda function an error message states that access is denied to the KMS key in the security account. The developer tests the previous Lambda function that uses the same KMS key and discovers that the previous Lambda function still can encrypt data as expected.

A security engineer must resolve the problem so that the new Lambda function in the development account can use the KMS key from the security account.

Which combination of steps should the security engineer take to meet these requirements? (Select TWO.)

AIn the security account configure an IAM role for the new Lambda function. Attach an IAM policy that allows access to the KMS key in the security account.

BIn the development account configure an IAM role for the new Lambda function. Attach a key policy that allows access to the KMS key in the security account.

CIn the development account configure an IAM role for the new Lambda function. Attach an IAM policy that allows access to the KMS key in the security account.

DConfigure a key policy for the KMS key m the security account to allow access to the IAM role of the new Lambda function in the security account.

EConfigure a key policy for the KMS key in the security account to allow access to the IAM role of the new Lambda function in the development account.

Show Suggested Answer

Suggested Answer: C, E

To allow cross-account access to a KMS key, the key policy of the KMS key must grant permission to the external account or principal, and the IAM policy of the external account or principal must delegate the key policy permission. In this case, the new Lambda function in the development account needs to use the KMS key in the security account, so the key policy of the KMS key must allow access to the IAM role of the new Lambda function in the development account (option E), and the IAM role of the new Lambda function in the development account must have an IAM policy that allows access to the KMS key in the security account (option C). Option A is incorrect because it creates an IAM role for the new Lambda function in the security account, not in the development account. Option B is incorrect because it attaches a key policy to an IAM role, which is not valid. Option D is incorrect because it allows access to the IAM role of the new Lambda function in the security account, not in the development account. Verified Reference:

https://docs.aws.amazon.com/kms/latest/developerguide/key-policy-modifying-external-accounts.html

https://docs.aws.amazon.com/autoscaling/ec2/userguide/key-policy-requirements-EBS-encryption.html

by Merilyn at Jul 10, 2024, 11:33 AM

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Gregoria

4 months ago

Oof, this is a tough one. I'm leaning towards B and E. The security engineer needs to bridge the gap between the development and security accounts to get this resolved.

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Anastacia

3 months ago

B: E) Configure a key policy for the KMS key in the security account to allow access to the IAM role of the new Lambda function in the development account.

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Reuben

4 months ago

A: B) In the development account configure an IAM role for the new Lambda function. Attach a key policy that allows access to the KMS key in the security account.

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Jill

4 months ago

Haha, this reminds me of that time I accidentally locked myself out of my own house. Anyway, I'm going with B and E. Gotta make sure the roles and policies are set up correctly across both accounts.

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Lenora

3 months ago

B: Exactly, that way the new Lambda function can use the KMS key without any issues.

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Oneida

3 months ago

A: The key policy in the security account needs to allow access to the IAM role of the new Lambda function in the development account.

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Colene

3 months ago

B: Totally, and attaching a key policy that allows access to the KMS key in the security account is a must.

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Mary

4 months ago

A: Yeah, setting up the IAM role for the new Lambda function in the development account is crucial.

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Rossana

5 months ago

I think option E could also be a valid solution. Configuring a key policy for the KMS key to allow access to the IAM role in the development account.

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Nikita

5 months ago

Hmm, this seems like a tricky one. I'd go with B and D. Configuring the IAM role in the development account and the key policy in the security account should do the trick.

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Yuki

3 months ago

A: Let's go ahead and implement those steps to see if it resolves the problem with the Lambda function.

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Ezekiel

3 months ago

B: Agreed, setting up the IAM role in the development account and adjusting the key policy in the security account should resolve the access issue.

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Carlee

4 months ago

A: I think we should go with option B and D. That way we cover both the IAM role and key policy.

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Audry

4 months ago

Definitely, B and D seem like the right combination of steps to resolve the problem.

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Louis

4 months ago

Agreed, setting up the IAM role in the development account and the key policy in the security account should solve the issue.

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Blossom

4 months ago

I think B and D are the way to go. It's all about configuring the IAM role and key policy.

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Lavonna

5 months ago

I believe option A is correct. It makes sense to configure the IAM role and attach the necessary policy for access.

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Bernardo

5 months ago

I agree with Kyoko. They should also attach an IAM policy that allows access to the KMS key in the security account.

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Lashandra

5 months ago

I think the answer is B and E. The developer needs to configure an IAM role in the development account and attach a key policy in the security account to allow access to the KMS key.

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