Missing Authentication for Critical Function Affecting cilium-1.14 package, versions <1.14.19-r23


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.02% (3rd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-CILIUM114-9509489
  • published22 Mar 2025
  • disclosed27 Sept 2023

Introduced: 27 Sep 2023

CVE-2023-41333  (opens in a new tab)
CWE-306  (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 create or modify CiliumNetworkPolicy objects in a particular namespace is able to affect traffic on an entire Cilium cluster, potentially bypassing policy enforcement in other namespaces. By using a crafted endpointSelector that uses the DoesNotExist operator on the reserved:init label, the attacker can create policies that bypass namespace restrictions and affect the entire Cilium cluster. This includes potentially allowing or denying all traffic. This attack requires API server access, as described in the Kubernetes API Server Attacker section of the Cilium Threat Model. This issue has been resolved in Cilium versions 1.14.2, 1.13.7, and 1.12.14. As a workaround an admission webhook can be used to prevent the use of endpointSelectors that use the DoesNotExist operator on the reserved:init label in CiliumNetworkPolicies.

CVSS Base Scores

version 3.1