Potential HTTP policy bypass when using header rules in Cilium
CVE-2023-30851

2.6LOW

Key Information:

Vendor

Cilium

Status
Cilium
Vendor
CVE Published:
25 May 2023

What is CVE-2023-30851?

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. This issue only impacts users who have a HTTP policy that applies to multiple toEndpoints AND have an allow-all rule in place that affects only one of those endpoints. In such cases, a wildcard rule will be appended to the set of HTTP rules, which could cause bypass of HTTP policies. This issue has been patched in Cilium 1.11.16, 1.12.9, and 1.13.2.

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Affected Version(s)

cilium < 1.11.16 < 1.11.16

cilium >= 1.12.0, < 1.12.9 < 1.12.0, 1.12.9

cilium >= 1.13.0, < 1.13.2 < 1.13.0, 1.13.2

References

https://github.com/cilium/cilium/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/cilium/cilium/releases/tag/v1.11.16
x_refsource_MISC
https://github.com/cilium/cilium/releases/tag/v1.12.9
x_refsource_MISC

CVSS V3.1

Score:
2.6
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Adjacent Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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