CVE-2023-27595
Cilium eBPF filters may be temporarily removed during agent restart
Severity by source
Trivy's own label is CRITICAL. Rated critical by NVD, Bitnami. Rated lower by GHSA (medium).
Description
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. In version 1.13.0, when Cilium is started, there is a short period when Cilium eBPF programs are not attached to the host. During this period, the host does not implement any of Cilium's featureset. This can cause disruption to newly established connections during this period due to the lack of Load Balancing, or can cause Network Policy bypass due to the lack of Network Policy enforcement during the window. This vulnerability impacts any Cilium-managed endpoints on the node (such as Kubernetes Pods), as well as the host network namespace (including Host Firewall). This vulnerability is fixed in Cilium 1.13.1 or later. Cilium releases 1.12.x, 1.11.x, and earlier are not affected. There are no known workarounds.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| bitnami::Bitnami Vulnerability Database | cilium, cilium-operator, hubble-relay | 1.13.1 |
| go::GitHub Security Advisory Go | github.com/cilium/cilium | 1.13.1 |
Show all 4 entries from 2 sources
| Source | Package | Fixed in |
|---|---|---|
| bitnami::Bitnami Vulnerability Database | cilium | 1.13.1 |
| bitnami::Bitnami Vulnerability Database | cilium-operator | 1.13.1 |
| bitnami::Bitnami Vulnerability Database | hubble-relay | 1.13.1 |
| go::GitHub Security Advisory Go | github.com/cilium/cilium | 1.13.1 |