ec2:ModifyEbsDefaultKmsKeyId is a Write access-level action in the ec2 service. Grants permission to change the default customer master key (CMK) for EBS encryption by default for your account
This action does not support resource-level permissions; use "Resource": "*" in your policy.
No condition keys are documented for this action.
A minimal policy that allows ec2:ModifyEbsDefaultKmsKeyId. Replace "Resource": "*" with a specific ARN to follow least privilege.
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "AllowEc2ModifyEbsDefaultKmsKeyId",
"Effect": "Allow",
"Action": "ec2:ModifyEbsDefaultKmsKeyId",
"Resource": "*"
}
]
}