CVE-2023-39347 Detail
Description
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.
Severity
References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-345 | Insufficient Verification of Data Authenticity | GitHub, Inc. |
Change History
1 change records found show changes
Initial Analysis by NIST 9/29/2023 11:54:47 AM
| Action | Type | Old Value | New Value |
|---|---|---|---|
| Added | CPE Configuration |
OR
*cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* versions up to (excluding) 1.12.14
*cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* versions from (including) 1.13.0 up to (excluding) 1.13.7
*cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* versions from (including) 1.14.0 up to (excluding) 1.14.2
|
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| Added | CVSS V3.1 |
NIST AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
|
| Changed | Reference Type |
https://docs.cilium.io/en/latest/security/threat-model/#kubernetes-api-server-attacker No Types Assigned |
https://docs.cilium.io/en/latest/security/threat-model/#kubernetes-api-server-attacker Exploit, Technical Description, Vendor Advisory |
| Changed | Reference Type |
https://github.com/cilium/cilium/security/advisories/GHSA-gj2r-phwg-6rww No Types Assigned |
https://github.com/cilium/cilium/security/advisories/GHSA-gj2r-phwg-6rww Vendor Advisory |
Quick Info
CVE Dictionary Entry:
CVE-2023-39347
NVD Published Date:
09/27/2023
NVD Last Modified:
09/29/2023
Source:
GitHub, Inc.