CVE-2023-34242lowCWE-200

CVE-2023-34242: low-severity vulnerability in cilium

Cilium vulnerable to information leakage via incorrect ReferenceGrant handling

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8Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 3.4epss 0.3%
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.
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
Affected products
cilium · cilium
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