CVE-2023-30851

Potential HTTP policy bypass when using header rules in Cilium

Published May 25, 2023 CVSS 3.1 · 2.6 Low EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-1449 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.
Github GHSA Github GHSA GHSA-2h44-x2wx-49f4 Potential HTTP policy bypass when using header rules in Cilium
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jan 16, 2025, 7:15 PM
Reserved
Apr 18, 2023, 4:13 PM
Status
Modified
Published
May 25, 2023, 6:15 PM
Modified
Jun 17, 2026, 5:55 AM