AWS Cloud Development Kit (AWS CDK) is an open-source software development framework to define cloud infrastructure in code and provision it through AWS CloudFormation. In the packages `aws-cdk-lib` 2.0.0 until 2.80.0 and `@aws-cdk/aws-eks` 1.57.0 until 1.202.0, `eks.Cluster` and `eks.FargateCluster` constructs create two roles, `CreationRole` and `default MastersRole`, that have an overly permissive trust policy.
The first, referred to as the `CreationRole`, is used by lambda handlers to create the cluster and deploy Kubernetes resources (e.g `KubernetesManifest`, `HelmChart`, ...) onto it. Users with CDK version higher or equal to 1.62.0 (including v2 users) may be affected.
The second, referred to as the `default MastersRole`, is provisioned only if the `mastersRole` property isn't provided and has permissions to execute `kubectl` commands on the cluster. Users with CDK version higher or equal to 1.57.0 (including v2 users) may be affected.
The issue has been fixed in `@aws-cdk/aws-eks` v1.202.0 and `aws-cdk-lib` v2.80.0. These versions no longer use the account root principal. Instead, they restrict the trust policy to the specific roles of lambda handlers that need it. There is no workaround available for CreationRole. To avoid creating the `default MastersRole`, use the `mastersRole` property to explicitly provide a role.
References
Link | Resource |
---|---|
https://github.com/aws/aws-cdk/issues/25674 | Issue Tracking Mitigation Third Party Advisory |
https://github.com/aws/aws-cdk/security/advisories/GHSA-rx28-r23p-2qc3 | Exploit Mitigation Third Party Advisory |
History
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MITRE Information
Status: PUBLISHED
Assigner: GitHub_M
Published: 2023-06-23T20:32:49.392Z
Updated: 2023-06-23T20:32:49.392Z
Reserved: 2023-06-14T14:17:52.179Z
Link: CVE-2023-35165
JSON object: View
NVD Information
Status : Analyzed
Published: 2023-06-23T21:15:09.553
Modified: 2023-07-06T15:37:52.977
Link: CVE-2023-35165
JSON object: View
Redhat Information
No data.
CWE