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Cilium leaks sensitive information in cilium-bugtool

High severity GitHub Reviewed Published Jun 13, 2024 in cilium/cilium • Updated Jun 20, 2024

Package

gomod github.com/cilium/cilium (Go)

Affected versions

>= 1.13.0, < 1.13.17
>= 1.14.0, < 1.14.12
>= 1.15.0, < 1.15.6

Patched versions

1.13.17
1.14.12
1.15.6

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.

References

@ferozsalam ferozsalam published to cilium/cilium Jun 13, 2024
Published by the National Vulnerability Database Jun 13, 2024
Published to the GitHub Advisory Database Jun 13, 2024
Reviewed Jun 13, 2024
Last updated Jun 20, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

EPSS score

0.044%
(11th percentile)

Weaknesses

CVE ID

CVE-2024-37307

GHSA ID

GHSA-wh78-7948-358j

Source code

Credits

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