Information disclosure in Cilium
CVE-2023-34242
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.
Vulnerability class: Information Disclosure
EPSS: 0.003 (22.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.4 (Low). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N.
Affected products
- Cilium — versions < 1.13.4
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2023-34242?
- CVE-2023-34242 is a low-severity vulnerability in Cilium, classified under Information Disclosure. CVSS score: 3.4/10. Published 2023-06-15.
- How severe is CVE-2023-34242?
- Low severity. CVSS v3 base score is 3.4 out of 10.