CVEvulnerability

CVE-2023-34242

5.3 MEDIUM Published 2023-06-15 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-06-15
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
3.4 LOW — CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-200

Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to version 1.13.4, when Gateway API is enabled in Cilium, the absence of a check on the namespace in which a ReferenceGrant is created could result in Cilium unintentionally gaining visibility of secrets (including certificates) and services across namespaces. An attacker on an affected cluster can leverage this issue to use cluster secrets that should not be visible to them, or communicate with services that they should not have access to. Gateway API functionality is disabled by default. This vulnerability is fixed in Cilium release 1.13.4. As a workaround, restrict the creation of `ReferenceGrant` resources to admin users by using Kubernetes RBAC.

Affected configurations

• cilium cilium (< 1.13.4)

Related

Weakness · CWE (1)

  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness

References