Vulnerability · Published Jun 15, 2023 · Assigned by GitHub_M
CVE-2023-34242Cilium vulnerable to information leakage via incorrect ReferenceGrant handling
Low 3.4
In plain English
A low-severity information exposure in cilium from cilium. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/cilium/cilium | 1.13.4 | GHSA-r7wr-4w5q-55m6 |
| Go | github.com/cilium/cilium | 1.13.4 | GO-2023-1862 |
Affected products (as reported)
Weakness: CWE-200 · Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
References
- https://github.com/cilium/cilium/security/advisories/GHSA-r7wr-4w5q-55m6 x_refsource_CONFIRM
- https://github.com/cilium/cilium/releases/tag/v1.13.4 x_refsource_MISC