QID 377879

Date Published: 2023-01-30

QID 377879: Kubernetes Arbitrary File Access Vulnerability

Kubernetes is an open-source container-orchestration system for automating deployment, scaling, and management of containerized applications.

Affected version:
Kubernetes 1.3.x-1.6.x
Kubernetes 1.7.0-1.7.13
Kubernetes 1.8.0-1.8.8
Kubernetes 1.9.0-1.9.3
QID Detection Logic:(Authenticated)
The QID uses 'kubectl --version' command to check for vulnerable versions of Kubernetes

A specially crafted pod spec combined with malicious container behavior can allow read/write access to arbitrary files outside volumes specified in the pod including the hosts filesystem.

CVSS V3 rated as Critical - 9.6 severity.

CVSS V2 rated as Medium - 5.5 severity.

Solution

For more information please visit 60813

Workaround:
Action Required: In addition to upgrading, PodSecurityPolicy objects designed to limit container permissions must completely disable hostPath volumes, as the allowedHostPaths feature does not restrict symlink creation and traversal. Future enhancements (tracked in issue #61043) are required to limit hostPath use to read only volumes or exact path matches before a PodSecurityPolicy can effectively restrict hostPath usage to a given subpath.

Vendor References

60813 - github.com/kubernetes/kubernetes/issues/60813

CVEs related to QID 377879

CVE-2017-1002101 |

Software Advisories

Advisory ID	Software	Component	Link
60813			github.com/kubernetes/kubernetes/issues/60813

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