title: Potential HTTP policy bypass when using header rules in Cilium
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.
problem types: CWE-693: Protection Mechanism Failure
affected:
{
vendor: cilium
product: cilium
versions:
version: < 1.11.16, status: affected
version: >= 1.12.0, < 1.12.9, status: affected
version: >= 1.13.0, < 1.13.2, status: affected
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: ADJACENT_NETWORK
availabilityImpact: NONE
baseScore: 2.6
baseSeverity: LOW
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: HIGH
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N
version: 3.1
]