ACM.119 Selecting the place to retailer secrets and techniques and configuration knowledge
This can be a continuation of my collection of posts on Automating Cybersecurity Metrics.
Within the final submit I defined why you would possibly need to use a customer-managed as a substitute of AWS-managed encryption.
Now let’s overview the variations between AWS Secrets and techniques Supervisor and AWS Programs Supervisor Parameter Retailer on the time of this writing. Word that this listing might develop into outdated at any minute if AWS modifications the best way these companies work so overview the documentation for the hottest data
| Parameter Retailer | Programs Supervisor
Restrict KMS Key to Service | No | Sure
Useful resource Coverage Entry Management | No | Sure
Cross-Account Position Entry | No | Sure
Generate CloudForamtion Secret | No | Sure
Routinely Rotate Secrets and techniques | No | Sure
CloudForamtion Encrypted Kind | No. |. Sure
Buyer KMS Key Encryption | Sure | Sure
Expiration | Sure | Sure
Variations | Sure. | Sure
Dynamic CloudForamtion references | Sure. | Sure
Cheaper | Sure | No
We are able to restrict use of an AWS KMS Key to AWS Secrets and techniques Supervisor.
It’s doable to make use of CloudFormation to create a price and retailer it in AWS Secrets and techniques Supervisor in an encrypted format utilizing the SecretString property.
This submit comprises an instance of utilizing AWS Lambda with Parameter Retailer. One of many limitations on the time of this writing is the shortcoming to make use of SecureString with CloudFormation. Which means you can’t create an encrypted parameter with CloudFormation when utilizing AWS Parameter retailer. See the hyperlink to the documentation on this submit.
The following submit provides a KMS Key Id to parameter retailer to encrypt knowledge saved in a parameter. It explains and has a hyperlink to the documentation associated to the truth that SSM Parameter retailer doesn’t provide useful resource insurance policies with entry management. On this submit I additionally discover the truth that you can’t use a coverage situation restrict a KMS key to solely be utilized by AWS Parameter Retailer like we might with Secrets and techniques Supervisor.
This submit considers the professionals and cons of storing a user-specific SSH key in AWS Parameter Retailer. AWS Parameter Retailer doesn’t provide useful resource insurance policies that permit us to restrict entry to a Parameter. I defined the advantages of utilizing an IAM coverage with a useful resource coverage within the final submit and why you would possibly need to use each for entry to delicate knowledge.
The following submit demonstrates tips on how to retailer an SSH key in Secrets and techniques Supervisor. You possibly can create an useful resource coverage with entry controls for an AWS secret.
On this submit we think about creating an AppSec group to handle secrets and techniques. You possibly can permit Secrets and techniques Supervisor directors to handle AWS Secrets and techniques Supervisor insurance policies.
This submit creates a task that the AppSec administrator group can assume. This submit explains how you need to use IAM, Secrets and techniques Supervisor, and KMS insurance policies to create an structure that requires a three-party collusion to acquire unauthorized entry to a secret.
It’s doable to create an auto-generated password with AWS Secrets and techniques Supervisor and CloudFormation. Parameter retailer doesn’t have that choice. Passing secrets and techniques in parameters isn’t safe as a result of parameter values are seen in numerous locations.
You should use the AWS console to implement MFA on a user-specific secret saved in Secrets and techniques Supervisor. We are able to’t implement MFA with developer credentials (entry key and secret key id) used with the AWS CLI. We are able to’t create a user-specific coverage for an AWS IAM Position for the reason that principal (identification) isn’t a single person in that case. This can be a work-around for these limitations.
These posts illustrate some issues you’ll be able to and can’t do with both AWS Secrets and techniques Supervisor or AWS Parameter Retailer.
Subsequent up we’re going to make some changes to our lambda and batch job deployments to work with the AppSec administrator position that manages secrets and techniques insurance policies.
Comply with for updates.
Teri Radichel
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