CVE-2023-34242 Cilium vulnerable to information leakage via incorrect ReferenceGrant handling
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2023-34242?
CVE-2023-34242 is a low-severity vulnerability in cilium, published on 15 Jun 2023.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2023-34242?
10 open source packages ship an affected version, including github.com/cilium/cilium, cilium and cilium-operator. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/cilium/cilium Go | From 1.13.0 | 1.13.4 |
github.com/cilium/cilium Go | From 1.13.0 | 1.13.4 |
github.com/cilium/cilium Go | From 1.13.0 | 1.13.4 |
cilium Bitnami | All versions | 1.13.4 |
cilium-operator Bitnami | All versions | 1.13.4 |
cilium-proxy Bitnami | All versions | 1.13.4 |
4 more packages
hubble Bitnami | All versions | 1.13.4 |
hubble-relay Bitnami | All versions | 1.13.4 |
hubble-ui Bitnami | All versions | 1.13.4 |
hubble-ui-backend Bitnami | All versions | 1.13.4 |
Products include Cilium Cilium.
How do I fix CVE-2023-34242?
Upgrade github.com/cilium/cilium to 1.13.4 or later.
Is CVE-2023-34242 being exploited?
There is no known exploitation of CVE-2023-34242 in the wild and no public exploit code.
Other vulnerabilities in cilium
- CVE-2026-49445 Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access
- CVE-2022-29178 Incorrect Default Permissions in Cilium
- CVE-2024-28860 Insecure IPsec transport encryption in Cilium
- CVE-2026-41520 Cillium exposes sensitive information included in the cilium-bugtool debug archive
- CVE-2024-37307 Cilium leaks sensitive information in cilium-bugtool
Sources
Also known as BIT-cilium-2023-34242, BIT-cilium-operator-2023-34242, BIT-cilium-proxy-2023-34242, BIT-hubble-2023-34242, BIT-hubble-relay-2023-34242, BIT-hubble-ui-2023-34242 and 3 more.