Insufficient Verification of Data Authenticity Affecting cilium-1.14 package, versions <1.14.19-r23


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.03% (8th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-CILIUM114-9509479
  • published22 Mar 2025
  • disclosed27 Sept 2023

Introduced: 27 Sep 2023

CVE-2023-39347  (opens in a new tab)
CWE-345  (opens in a new tab)

How to fix?

Upgrade Chainguard cilium-1.14 to version 1.14.19-r23 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cilium-1.14 package and not the cilium-1.14 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. An attacker with the ability to update pod labels can cause Cilium to apply incorrect network policies. This issue arises due to the fact that on pod update, Cilium incorrectly uses user-provided pod labels to select the policies which apply to the workload in question. This can affect Cilium network policies that use the namespace, service account or cluster constructs to restrict traffic, Cilium clusterwide network policies that use Cilium namespace labels to select the Pod and Kubernetes network policies. Non-existent construct names can be provided, which bypass all network policies applicable to the construct. For example, providing a pod with a non-existent namespace as the value of the io.kubernetes.pod.namespace label results in none of the namespaced CiliumNetworkPolicies applying to the pod in question. This attack requires the attacker to have Kubernetes API Server access, as described in the Cilium Threat Model. This issue has been resolved in: Cilium versions 1.14.2, 1.13.7, and 1.12.14. Users are advised to upgrade. As a workaround an admission webhook can be used to prevent pod label updates to the k8s:io.kubernetes.pod.namespace and io.cilium.k8s.policy.* keys.

CVSS Base Scores

version 3.1