Cilium leaks sensitive information in cilium-bugtool
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.
Summary
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.13.0 and prior to versions 1.13.7, 1.14.12, and 1.15.6, 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 TLS inspection, Ingress with TLS termination, Gateway API with TLS termination, and Kafka network policies with API key filtering features are affected. The sensitive data includes the CA certificate, certificate chain, and private key used by Cilium HTTP Network Policies, and when using Ingress/Gateway API and 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. This issue has been patched in Cilium v1.15.6, v1.14.12, and v1.13.17. There is no workaround to this issue.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| cilium | cilium | 1.13.0 to before 1.13.17; 1.14.0 to before 1.14.12; 1.15.0 to before 1.15.6 | 1.13.17, 1.14.12, 1.15.6 | Patch available | CNA |
| — | github.com/cilium/cilium (Go) | 1.13.0 to before 1.13.17 | 1.13.17 | Patch available | GHSA-wh78-7948-358j |
| — | github.com/cilium/cilium (Go) | 1.14.0 to before 1.14.12 | 1.14.12 | Patch available | GHSA-wh78-7948-358j |
| — | github.com/cilium/cilium (Go) | 1.15.0 to before 1.15.6 | 1.15.6 | Patch available | GHSA-wh78-7948-358j |
- cilium Vendorcilium Affected 1.13.0 to before 1.13.17; 1.14.0 to before 1.14.12; 1.15.0 to before 1.15.6 Fixed in 1.13.17, 1.14.12, 1.15.6 Patch available CNA
- github.com/cilium/cilium (Go) Vendor— Affected 1.13.0 to before 1.13.17 Fixed in 1.13.17 Patch available GHSA-wh78-7948-358j
- github.com/cilium/cilium (Go) Vendor— Affected 1.14.0 to before 1.14.12 Fixed in 1.14.12 Patch available GHSA-wh78-7948-358j
- github.com/cilium/cilium (Go) Vendor— Affected 1.15.0 to before 1.15.6 Fixed in 1.15.6 Patch available GHSA-wh78-7948-358j
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* | 1.13.0 to before 1.13.17; 1.14.0 to before 1.14.12; 1.15.0 to before 1.15.6 | Vulnerable | cilium |
- cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* Versions 1.13.0 to before 1.13.17; 1.14.0 to before 1.14.12; 1.15.0 to before 1.15.6 Vulnerable ·cilium
Remediation
- Fix · CNA cilium (cilium) Fixed in 1.13.17, 1.14.12, 1.15.6
- Fix · GHSA-wh78-7948-358j github.com/cilium/cilium (Go) Fixed in 1.13.17 Advisory →
- Fix · GHSA-wh78-7948-358j github.com/cilium/cilium (Go) Fixed in 1.14.12 Advisory →
- Fix · GHSA-wh78-7948-358j github.com/cilium/cilium (Go) Fixed in 1.15.6 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-37307
- 2026-10-03 Alias added: GHSA-wh78-7948-358j
References
Patch 6
- https://github.com/cilium/cilium/commit/0191b1ebcfdd61cefd06da0315a0e7d504167407
- https://github.com/cilium/cilium/commit/224e288a5bf40d0bb0f16c9413693b319633431a
- https://github.com/cilium/cilium/commit/9299c0fd0024e33397cffc666ff851e82af28741
- https://github.com/cilium/cilium/commit/958d7b77274bf2c272d8cdfd812631d644250653
- https://github.com/cilium/cilium/commit/9eb25ba40391a9b035d7e66401b862818f4aac4b
- https://github.com/cilium/cilium/commit/bf9a1ae1b2d2b2c9cca329d7aa96aa4858032a61
Advisory 2
More Cilium vulnerabilities
- TI-2024-32092 CIDR deny policies may not take effect when a more narrow CIDR allow is present CVSS 3.1HIGH 8.7
- TI-2023-12305 Cilium eBPF filters may be temporarily removed during agent restart CVSS 3.1CRITICAL 9.8
- TI-2023-20486 Cilium NetworkPolicy bypass via pod labels CVSS 3.1CRITICAL 9.0
- TI-2022-11721 Incorrect Default Permissions in Cilium CVSS 3.1HIGH 8.8
- TI-2026-36600 Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access CVSS 3.1CRITICAL 9.2
- TI-2026-40915 Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces CVSS 3.1HIGH 8.9
Sources
- CVE-2024-37307 · CVE Program
- CVE-2024-37307 · NVD
- FIRST EPSS
- GHSA-wh78-7948-358j · GitHub Advisory Database · CC BY 4.0
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