CVE-2024-37307: Cilium leaks sensitive information in cilium-bugtool
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.
References
- github.com/advisories/GHSA-wh78-7948-358j
- github.com/cilium/cilium
- github.com/cilium/cilium/commit/0191b1ebcfdd61cefd06da0315a0e7d504167407
- github.com/cilium/cilium/commit/224e288a5bf40d0bb0f16c9413693b319633431a
- github.com/cilium/cilium/commit/9299c0fd0024e33397cffc666ff851e82af28741
- github.com/cilium/cilium/commit/958d7b77274bf2c272d8cdfd812631d644250653
- github.com/cilium/cilium/commit/9eb25ba40391a9b035d7e66401b862818f4aac4b
- github.com/cilium/cilium/commit/bf9a1ae1b2d2b2c9cca329d7aa96aa4858032a61
- github.com/cilium/cilium/security/advisories/GHSA-wh78-7948-358j
- nvd.nist.gov/vuln/detail/CVE-2024-37307
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