CVE-2024-37307

Workarounds

There is no workaround to this issue.

Acknowledgements

The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @sayboras for their work on triaging and remediating this issue.

For more information

If you have any questions or comments about this advisory, please reach out on Slack.

If you think you have found a vulnerability affecting Cilium, we strongly encourage you to report it to our security mailing list at [email protected]. This is a private mailing list for the Cilium security team, and your report will be treated as top priority.

The output of cilium-bugtool can contain sensitive data when the tool is run (with the --envoy-dump flag set) against Cilium deployments with the Envoy proxy enabled.

Users of the following features are affected:

• TLS inspection
• Ingress with TLS termination
• Gateway API with TLS termination
• Kafka network policies with API key filtering

The sensitive data includes:

• The CA certificate, certificate chain, and private key used by Cilium HTTP Network Policies, and when using Ingress/Gateway API
• The API keys used in Kafka-related network policy

cilium-bugtool is a debugging tool that is typically invoked manually and does not run during the normal operation of a Cilium cluster.

CVE-2024-37307 has a CVSS score of 7.9 (High). The vector is requires local access, high privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1.13.17, 1.14.12, 1.15.6); upgrading removes the vulnerable code path.

Kodem intelligence

This issue affects:

• Cilium v1.13 between v1.13.0 and v1.13.16 inclusive
• Cilium v1.14 between v1.14.0 and v1.14.11 inclusive
• Cilium v1.15 between v1.15.0 and v1.15.5 inclusive

This issue has been patched in:

• Cilium v1.15.6
• Cilium v1.14.12
• Cilium v1.13.17

1. What is CVE-2024-37307? CVE-2024-37307 is a high-severity security vulnerability in github.com/cilium/cilium (go), affecting versions >= 1.13.0, < 1.13.17. It is fixed in 1.13.17, 1.14.12, 1.15.6.
2. How severe is CVE-2024-37307? CVE-2024-37307 has a CVSS score of 7.9 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of github.com/cilium/cilium are affected by CVE-2024-37307? github.com/cilium/cilium (go) versions >= 1.13.0, < 1.13.17 is affected.
4. Is there a fix for CVE-2024-37307? Yes. CVE-2024-37307 is fixed in 1.13.17, 1.14.12, 1.15.6. Upgrade to this version or later.
5. Is CVE-2024-37307 exploitable, and should I be worried? Whether CVE-2024-37307 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2024-37307 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2024-37307?
   • Upgrade github.com/cilium/cilium to 1.13.17 or later
   • Upgrade github.com/cilium/cilium to 1.14.12 or later
   • Upgrade github.com/cilium/cilium to 1.15.6 or later