CVE-2023-34242

Cilium vulnerable to information leakage via incorrect ReferenceGrant handling

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.

Category

3.4
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.05%
Third-Party Advisory github.com
Affected: cilium cilium
Published at:
Updated at:

References

Link Tags
https://github.com/cilium/cilium/security/advisories/GHSA-r7wr-4w5q-55m6 third party advisory
https://github.com/cilium/cilium/releases/tag/v1.13.4 release notes

Frequently Asked Questions

What is the severity of CVE-2023-34242?
CVE-2023-34242 has been scored as a low severity vulnerability.
How to fix CVE-2023-34242?
To fix CVE-2023-34242, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-34242 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-34242 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-34242?
CVE-2023-34242 affects cilium cilium.
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