SSO Policy with full privileges

• Query id: 132a8c31-9837-4203-9fd1-15ca210c7b73
• Query name: SSO Policy with full privileges
• Platform: Terraform
• Severity: High
• Category: Access Control
• URL: Github

Description

SSO policies should be configured to grant limited administrative privileges, rather than full access to all resources. This approach allows for better security and control over the resources being accessed.
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - tf file

resource "aws_ssoadmin_permission_set_inline_policy" "pos1" {
  instance_arn       = aws_ssoadmin_permission_set.example.instance_arn
  permission_set_arn = aws_ssoadmin_permission_set.example.arn
  inline_policy = <<POLICY
{
  "Statement": [
    {
      "Action": [
        "*"
      ],
      "Effect": "Allow",
      "Resource": [
        "*"
      ],
      "Sid": ""
    },
    {
      "Action": "s3:PutObject*",
      "Effect": "Allow",
      "Resource": "arn:aws:s3:::b1/*",
      "Sid": ""
    }
  ],
  "Version": "2012-10-17"
}
POLICY
}

Code samples without security vulnerabilities

Negative test num. 1 - tf file

resource "aws_ssoadmin_permission_set_inline_policy" "neg1" {
  instance_arn       = aws_ssoadmin_permission_set.example.instance_arn
  permission_set_arn = aws_ssoadmin_permission_set.example.arn
  inline_policy = <<POLICY
{
  "Statement": [
    {
      "Action": [
        "s3:ListBucket*",
        "s3:HeadBucket",
        "s3:Get*"
      ],
      "Effect": "Allow",
      "Resource": [
        "arn:aws:s3:::b1",
        "arn:aws:s3:::b1/*",
        "arn:aws:s3:::b2",
        "arn:aws:s3:::b2/*"
      ],
      "Sid": ""
    },
    {
      "Action": "s3:PutObject*",
      "Effect": "Allow",
      "Resource": "arn:aws:s3:::b1/*",
      "Sid": ""
    }
  ],
  "Version": "2012-10-17"
}
POLICY
}