Cilium leaks sensitive information in cilium-bugtool

CVE-2024-37307 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

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:

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.

Patches

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

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.

Basic information

Type
reviewed
Severity
high
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2024-06-13 19:29:36 UTC
Updated
2024-06-20 18:53:15 UTC
GitHub reviewed
2024-06-13 19:29:36 UTC
NVD published
2024-06-13

EPSS Score

Score Percentile
0.05% 15.07%

CVSS Scores

Base score Version Severity Vector
7.9 3.1 —
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.

Identifiers

Type Value
GHSA GHSA-wh78-7948-358j ↗
CVE CVE-2024-37307 ↗

CWEs

CWE id Name
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Credits

  • sayboras (remediation_developer)

Affected packages (3)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
go github.com/cilium/cilium >= 1.13.0, < 1.13.17 1.13.17 —
go github.com/cilium/cilium >= 1.14.0, < 1.14.12 1.14.12 —
go github.com/cilium/cilium >= 1.15.0, < 1.15.6 1.15.6 —

References

cvelogic Threat Intelligence