Robot Upgrade: submariner-operator chart upgrade from 0.19.2 to 0.22.1#3917
Robot Upgrade: submariner-operator chart upgrade from 0.19.2 to 0.22.1#3917weizhoublue wants to merge 1 commit intomainfrom
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Summary of ChangesHello @weizhoublue, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request primarily focuses on upgrading the submariner-operator Helm chart to a newer version, bringing with it significant refactoring of Kubernetes Role-Based Access Control (RBAC) and service account definitions. The changes aim to enhance the maintainability and clarity of the chart's security configurations by breaking down large, generic RBAC files into smaller, component-specific ones. This modular approach simplifies the management of permissions for different Submariner components. Highlights
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Code Review
This pull request upgrades the submariner-operator chart from version 0.19.2 to 0.22.1. While the refactoring of RBAC resources into component-specific files is a positive step for maintainability, a security audit reveals critical concerns. Many defined roles and cluster roles violate the principle of least privilege, granting overly broad access to sensitive resources like secrets, configmaps, nodes, and network-related resources, which could lead to cluster-wide impact upon compromise. Furthermore, a weak default token is used in the values files. Additionally, a critical issue has been identified in the new RBAC configuration for OpenShift monitoring that will cause deployment failures if the chart is not installed in a specific namespace.
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - configmaps | ||
| verbs: | ||
| - create | ||
| - get | ||
| - list | ||
| - watch | ||
| - update |
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The submariner-operator ClusterRole has cluster-wide create, get, list, watch, and update permissions on ConfigMaps. The comment indicates this is for updating the CoreDNS config, but the permission is not restricted to a specific ConfigMap. A compromised operator could modify any ConfigMap in the cluster, leading to cluster-wide denial of service, configuration manipulation, or other attacks. This is a critical risk. The permission should be scoped to the specific coredns ConfigMap in the kube-system namespace by using resourceNames.
| kind: Role | ||
| metadata: | ||
| name: submariner-metrics-reader | ||
| namespace: submariner-operator |
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The namespace for the submariner-metrics-reader Role is hardcoded to submariner-operator. The associated RoleBinding (read-submariner-metrics) does not specify a namespace, so it will be created in the release namespace ({{ .Release.Namespace }}). A RoleBinding can only reference a Role in the same namespace. This will cause the Helm deployment to fail if the chart is installed in any namespace other than submariner-operator.
To fix this and allow the chart to be deployed in any namespace, the Role's namespace should be dynamically set to the release namespace.
namespace: {{ .Release.Namespace }}| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - secrets | ||
| verbs: | ||
| - get | ||
| - update | ||
| - create | ||
| - watch | ||
| - delete | ||
| - list |
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The submariner-gateway Role has overly broad permissions on Secrets within the namespace. It is granted get, update, create, watch, delete, and list permissions on all secrets. If the gateway component were to be compromised, an attacker could potentially read, modify, or delete all secrets in the release namespace, leading to privilege escalation and compromise of other components. According to the principle of least privilege, access should be restricted to only the specific secrets (using resourceNames) that the gateway requires.
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - services | ||
| - endpoints | ||
| verbs: | ||
| - create | ||
| - get | ||
| - list | ||
| - watch | ||
| - update | ||
| - delete |
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The submariner-globalnet ClusterRole is granted broad permissions to manage services and endpoints across all namespaces (create, get, list, watch, update, delete). A compromise of the submariner-globalnet component could allow an attacker to modify, intercept, or redirect network traffic for any service in the cluster. This violates the principle of least privilege. If possible, these permissions should be restricted to specific namespaces or resources.
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| # For syncing Secrets from the broker | ||
| - secrets | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| - create | ||
| - update | ||
| - delete |
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The submariner-operator Role is granted get, list, watch, create, update, and delete permissions on all secrets within its namespace. A compromised operator could exfiltrate or manipulate all secrets in the namespace, potentially leading to further privilege escalation. The comment states this is for syncing secrets from the broker. Access should be limited to only the specific secrets required for this function, using resourceNames or label selectors.
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - nodes | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| # route agent needs to annotate nodes to prevent OVNK SNAT | ||
| - update |
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The submariner-routeagent ClusterRole has update permission on all nodes in the cluster. The comment states this is for annotating nodes, but the permission is not restricted to only annotations. A compromised route agent could modify node specs, taints, or labels, potentially causing cluster-wide scheduling disruptions or other issues. The update permission should be replaced with patch and restricted to only the necessary fields if possible, or a more sophisticated mechanism like an admission controller should be used to limit the scope of changes.
| - apiGroups: | ||
| - discovery.k8s.io | ||
| resources: | ||
| - endpointslices | ||
| - endpointslices/restricted | ||
| verbs: | ||
| - create | ||
| - get | ||
| - list | ||
| - watch | ||
| - update | ||
| - delete | ||
| - deletecollection |
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The submariner-lighthouse-agent ClusterRole has full create, update, and delete permissions on EndpointSlices cluster-wide. A compromise of this agent could allow an attacker to manipulate EndpointSlices for any service in the cluster, leading to traffic interception, redirection, or denial of service. While this may be required for multi-cluster service discovery, it represents a significant concentration of privilege.
| tag: "0.19.2" | ||
| tag: "0.22.1" | ||
| registry: quay.m.daocloud.io | ||
| broker: |
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The default value for broker.token is a weak, hardcoded placeholder ('test'). If an administrator deploys the chart without overriding this value, the broker connection will be authenticated with a well-known, insecure token. The default value should be changed to an empty string ("") to force the user to provide a strong, unique token.
token: ""
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I am robot, upgrade: project submariner-operator chart upgrade from 0.19.2 to 0.22.1