CVE-2024-42487 Cilium's Gateway API route matching order contradicts specification
Cilium incorrectly prioritizes header matching over method matching in Gateway API routes, potentially allowing security policy bypasses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-42487?
CVE-2024-42487 is a medium-severity vulnerability in cilium, published on 15 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. In the 1.15 branch prior to 1.15.8 and the 1.16 branch prior to 1.16.1, Gateway API HTTPRoutes and GRPCRoutes do not follow the match precedence specified in the Gateway API specification. In particular, request headers are matched before request methods, when the specification describes that the request methods must be respected before headers are matched. This could result in unexpected behaviour with security This issue is fixed in Cilium v1.15.8 and v1.16.1. There is no workaround for this issue.
Which versions are affected by CVE-2024-42487?
8 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 1.15.0 | 1.15.8, 1.16.1 |
github.com/cilium/cilium Go | From 1.15.0 | 1.15.8 |
github.com/cilium/cilium Go | From 1.15.0 | 1.15.8 |
github.com/cilium/cilium Go | From 1.16.0 | 1.16.1 |
github.com/cilium/cilium Go | From 1.16.0 | 1.16.1 |
cilium Bitnami | From 1.15.0 | 1.16.1 |
2 more packages
cilium-operator Bitnami | From 1.15.4 | 1.16.1 |
hubble-relay Bitnami | From 1.15.0 | 1.16.1 |
Products include Cilium Cilium.
How do I fix CVE-2024-42487?
Upgrade github.com/cilium/cilium to a fixed version for your release line: 1.15.8 or 1.16.1.
Is CVE-2024-42487 being exploited?
There is no known exploitation of CVE-2024-42487 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-2024-42487, BIT-cilium-operator-2024-42487, BIT-hubble-relay-2024-42487, GHSA-qcm3-7879-xcww, GO-2024-3071.