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Question 540 - SCS-C01 discussion

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A company has launched an Amazon EC2 instance with an Amazon Elastic Block Store (Amazon EBS) volume in the us-east-1 Region The volume is encrypted with an AWS Key Management Service (AWS KMS) customer managed key that the company's security team created The security team has created an 1AM key policy and has assigned the policy to the key The security team has also created an 1AM instance profile and has assigned the profile to the instance The EC2 instance will not start and transitions from the pending state to the shutting-down state to the terminated state Which combination of steps should a security engineer take to troubleshoot this issue? (Select TWO )

A.
Verify that the KMS key policy specifies a deny statement that prevents access to the key by using the aws SourcelP condition key Check that the range includes the EC2 instance IP address that is associated with the EBS volume
Answers
A.
Verify that the KMS key policy specifies a deny statement that prevents access to the key by using the aws SourcelP condition key Check that the range includes the EC2 instance IP address that is associated with the EBS volume
B.
Verify that the KMS key that is associated with the EBS volume is set to the Symmetric key type
Answers
B.
Verify that the KMS key that is associated with the EBS volume is set to the Symmetric key type
C.
Verify that the KMS key that is associated with the EBS volume is in the Enabled state
Answers
C.
Verify that the KMS key that is associated with the EBS volume is in the Enabled state
D.
Verify that the EC2 role that is associated with the instance profile has the correct 1AM instance policy to launch an EC2 instance with the EBS volume
Answers
D.
Verify that the EC2 role that is associated with the instance profile has the correct 1AM instance policy to launch an EC2 instance with the EBS volume
E.
Verify that the key that is associated with the EBS volume has not expired and needs to be rotated
Answers
E.
Verify that the key that is associated with the EBS volume has not expired and needs to be rotated
Suggested answer: C, D

Explanation:

Explanation: To troubleshoot the issue of an EC2 instance failing to start and transitioning to a terminated state when it has an EBS volume encrypted with an AWS KMS customer managed key, a security engineer should take the following steps:

1. Verify that the KMS key that is associated with the EBS volume is in the Enabled state. If the key is not enabled, it will not function properly and could cause the EC2 instance to fail.

2. Verify that the EC2 role that is associated with the instance profile has the correct IAM instance policy to launch an EC2 instance with the EBS volume. If the instance does not have the necessary permissions, it may not be able to mount the volume and could cause the instance to fail. Therefore, options C and D are the correct answers.

Reference: For more information, please see the Amazon AWS Certified Security - Specialty Exam

Guide, p. 47-48. Also, refer to [1] "Amazon EBS encryption uses AWS KMS keys when creating encrypted volumes ...".

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asked 16/09/2024
Mark David
44 questions
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