Control: 1.11 Ensure that Separation of duties is enforced while assigning KMS related roles to users
Description
It is recommended that the principle of 'Separation of Duties' is enforced while assigning KMS related roles to users.
The built-in/predefined IAM role Cloud KMS Admin
allows the user/identity to create, delete, and manage service account(s). The built-in/predefined IAM role Cloud KMS CryptoKey Encrypter/Decrypter
allows the user/identity (with adequate privileges on concerned resources) to encrypt and decrypt data at rest using an encryption key(s).
The built-in/predefined IAM role Cloud KMS CryptoKey Encrypter
allows the user/identity (with adequate privileges on concerned resources) to encrypt data at rest using an encryption key(s). The built-in/predefined IAM role Cloud KMS CryptoKey Decrypter
allows the user/identity (with adequate privileges on concerned resources) to decrypt data at rest using an encryption key(s).
Separation of duties is the concept of ensuring that one individual does not have all necessary permissions to be able to complete a malicious action. In Cloud KMS, this could be an action such as using a key to access and decrypt data a user should not normally have access to. Separation of duties is a business control typically used in larger organizations, meant to help avoid security or privacy incidents and errors. It is considered best practice.
No user(s) should have Cloud KMS Admin
and any of the Cloud KMS CryptoKey Encrypter/Decrypter
, Cloud KMS CryptoKey Encrypter
, Cloud KMS CryptoKey Decrypter
roles assigned at the same time.
Remediation
From Console
- Go to
IAM & Admin/IAM
using https://console.cloud.google.com/iam-admin/iam - For any member having
Cloud KMS Admin
and any of theCloud KMS CryptoKey Encrypter/Decrypter, Cloud KMS CryptoKey Encrypter, Cloud KMS CryptoKey Decrypter
roles granted/assigned, click theDelete Bin
icon to remove the role from the member.
Note: Removing a role should be done based on the business requirement.
Usage
Run the control in your terminal:
powerpipe control run gcp_compliance.control.cis_v200_1_11
Snapshot and share results via Turbot Pipes:
powerpipe loginpowerpipe control run gcp_compliance.control.cis_v200_1_11 --share
SQL
This control uses a named query:
kms_key_separation_of_duties_enforced