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How the CVE Works:
CVE-2025-XXXX exploits the deprecated `gitRepo` volume feature in Kubernetes. When a pod is created with a `gitRepo` volume, it clones a git repository into the pod’s filesystem. However, due to improper isolation, a malicious user with `create pod` permissions can configure the `gitRepo` volume to access local git repositories from other pods on the same node. This occurs because the `gitRepo` volume does not enforce proper namespace or node-level isolation, allowing unauthorized access to sensitive data stored in git repositories of other pods. The vulnerability is exacerbated by the fact that the `gitRepo` volume feature is deprecated and no longer receives security updates, leaving clusters using this feature exposed.
DailyCVE Form:
Platform: Kubernetes
Version: Versions using in-tree gitRepo volume
Vulnerability: Local repository access
Severity: Moderate
Date: Mar 13, 2025
What Undercode Say:
Exploitation:
1. Exploit Command:
Create a malicious pod YAML file to exploit the `gitRepo` volume:
apiVersion: v1 kind: Pod metadata: name: malicious-pod spec: containers: - name: attacker image: busybox command: [bash] volumeMounts: - name: git-repo mountPath: /git-repo volumes: - name: git-repo gitRepo: repository: file:///var/lib/kubelet/pods/<target-pod-uid>/volumes/kubernetes.io~git-repo/<target-repo>
2. Exploit Steps:
- Identify a target pod with a `gitRepo` volume.
- Extract the target pod’s UID and repository path.
- Deploy the malicious pod to access the target repository.
Protection:
1. Mitigation Command:
Disable the `gitRepo` volume feature by removing its usage from all pod definitions:
kubectl get pods --all-namespaces -o yaml | grep -i "gitRepo"
Replace `gitRepo` volumes with alternatives like `git-sync` sidecar containers.
2. Patch Recommendation:
Upgrade to Kubernetes versions that completely remove the `gitRepo` volume feature. Use the following command to check for deprecated features:
kubectl api-resources --api-group=
3. RBAC Restriction:
Limit `create pod` permissions to trusted users only:
apiVersion: rbac.authorization.k8s.io/v1 kind: Role metadata: namespace: default name: restricted-pod-creation rules: - apiGroups: [bash] resources: [bash] verbs: [bash] resourceNames: [bash]
4. Monitoring:
Use Kubernetes audit logs to detect unauthorized pod creation attempts:
kubectl logs -n kube-system -l component=kube-apiserver --tail=100 | grep "pods/create"
5. Alternative Solutions:
Use secure git repository management tools like `ArgoCD` or `Flux` for GitOps workflows, ensuring proper isolation and access control.
By following these steps, Kubernetes administrators can mitigate the risks associated with CVE-2025-XXXX and secure their clusters against unauthorized local repository access.
References:
Reported By: https://github.com/advisories/GHSA-3wgm-2gw2-vh5m
Extra Source Hub:
Undercode
