AWSProtonCodeBuildProvisioningServiceRolePolicy

Last Modified

Mar 12, 2026

March 12, 2026 at 09:26 PM UTC

Version

Total Versions

Created

May 17, 2023

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Risk

Medium

The same capabilities in a scoped form, resource policy writes, reads across all data, or full access to a whole service. Read from this policy document alone: trust policies, boundaries and SCPs in your account still decide what actually succeeds. How this is assessed

Medium
Can launch resources that run as a more privileged role
Grants the actions of 2 documented escalation paths, but only on named resources or under a condition. Review that scope before trusting it.
- cloudformation-001iam:PassRole + cloudformation:CreateStackscoped
  - iam:PassRole: condition iam:PassedToService
  - cloudformation:CreateStack: on arn:aws:cloudformation:*:*:stack/AWSProton-CodeBuild-*
- codebuild-001iam:PassRole + codebuild:CreateProject + codebuild:StartBuildscoped
  - iam:PassRole: condition iam:PassedToService
  - codebuild:CreateProject: on arn:aws:codebuild:*:*:project/AWSProton*
  - codebuild:StartBuild: on arn:aws:codebuild:*:*:project/AWSProton*
Use with caution: Check which roles, users or policies fall inside the scope shown above. Within it the escalation works as documented, so keep privileged principals out of it.
Medium
Can take over existing resources that run as another role
Grants the actions of 2 documented escalation paths, but only on named resources or under a condition. Review that scope before trusting it.
- cloudformation-002cloudformation:UpdateStackscoped
  - cloudformation:UpdateStack: on arn:aws:cloudformation:*:*:stack/AWSProton-CodeBuild-*
- codebuild-002codebuild:StartBuildscoped
  - codebuild:StartBuild: on arn:aws:codebuild:*:*:project/AWSProton*
Use with caution: Check which roles, users or policies fall inside the scope shown above. Within it the escalation works as documented, so keep privileged principals out of it.
Medium
Flagged by AWS IAM Access Analyzer
AWS's own policy validation raises 1 security warning: PASS_ROLE_WITH_STAR_IN_RESOURCE.
- Using the iam:PassRole action with wildcards (*) in the resource can be overly permissive because it allows iam:PassRole permissions on multiple resources. We recommend that you specify resource ARNs or add the iam:PassedToService condition key to your statement.
Use with caution: Read AWS's finding and the documentation it links to.

IAM Access Analyzer (1)

Security warning / PASS_ROLE_WITH_STAR_IN_RESOURCE
Using the iam:PassRole action with wildcards (*) in the resource can be overly permissive because it allows iam:PassRole permissions on multiple resources. We recommend that you specify resource ARNs or add the iam:PassedToService condition key to your statement. AWS docs

Policy Document

View on GitHub

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59{
  "PolicyVersion": {
    "Document": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Effect": "Allow",
          "Action": [
            "cloudformation:CreateStack",
            "cloudformation:CreateChangeSet",
            "cloudformation:DeleteChangeSet",
            "cloudformation:DeleteStack",
            "cloudformation:UpdateStack",
            "cloudformation:DescribeStacks",
            "cloudformation:DescribeStackEvents",
            "cloudformation:ListStackResources"
          ],
          "Resource": [
            "arn:aws:cloudformation:*:*:stack/AWSProton-CodeBuild-*"
          ]
        },
        {
          "Effect": "Allow",
          "Action": [
            "codebuild:CreateProject",
            "codebuild:DeleteProject",
            "codebuild:UpdateProject",
            "codebuild:StartBuild",
            "codebuild:StopBuild",
            "codebuild:RetryBuild",
            "codebuild:BatchGetBuilds",
            "codebuild:BatchGetProjects"
          ],
          "Resource": "arn:aws:codebuild:*:*:project/AWSProton*"
        },
        {
          "Effect": "Allow",
          "Action": "iam:PassRole",
          "Resource": "*",
          "Condition": {
            "StringEqualsIfExists": {
              "iam:PassedToService": "codebuild.amazonaws.com"
            }
          }
        },
        {
          "Effect": "Allow",
          "Action": [
            "servicequotas:GetServiceQuota"
          ],
          "Resource": "*"
        }
      ]
    },
    "VersionId": "v2",
    "IsDefaultVersion": true,
    "CreateDate": "2023-05-17T16:11:40+00:00"
  }
}