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Intermittent HTTP policy bypass

High severity GitHub Reviewed Published Mar 18, 2024 in cilium/cilium • Updated Mar 19, 2024

Package

gomod github.com/cilium/cilium (Go)

Affected versions

>= 1.13.9, < 1.13.13
>= 1.14.0, < 1.14.8
>= 1.15.0, < 1.15.2

Patched versions

1.13.13
1.14.8
1.15.2

Description

Impact

Cilium's HTTP policies are not consistently applied to all traffic in the scope of the policies, leading to HTTP traffic being incorrectly and intermittently forwarded when it should be dropped.

Patches

This issue affects:

  • Cilium v1.13 between v1.13.9 and v1.13.12 inclusive
  • Cilium v1.14 between v1.14.0 and v1.14.7 inclusive
  • Cilium v1.15.0 and v1.15.1

This issue has been patched in:

  • Cilium v1.15.2
  • Cilium v1.14.8
  • Cilium v1.13.13

Workarounds

There is no workaround for this issue – affected users are strongly encouraged to upgrade.

Acknowledgements

The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @romikps for discovering and reporting this issue, and @sayboras and @jrajahalme for preparing the fix.

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 security@cilium.io. This is a private mailing list for the Cilium internal security team, and your report will be treated as top priority.

References

@ferozsalam ferozsalam published to cilium/cilium Mar 18, 2024
Published to the GitHub Advisory Database Mar 18, 2024
Reviewed Mar 18, 2024
Published by the National Vulnerability Database Mar 18, 2024
Last updated Mar 19, 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
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
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:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

EPSS score

0.129%
(48th percentile)

Weaknesses

CVE ID

CVE-2024-28248

GHSA ID

GHSA-68mj-9pjq-mc85

Source code

Credits

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