CVEvulnerability

CVE-2023-27594

7.3 HIGH Published 2023-03-17 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-03-17
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.2 MEDIUM — CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS 3.1 ([email protected])
7.3 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weaknesses
CWE-285, CWE-863

Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.11.15, 1.12.8, and 1.13.1, under specific conditions, Cilium may misattribute the source IP address of traffic to a cluster, identifying external traffic as coming from the host on which Cilium is running. As a consequence, network policies for that cluster might be bypassed, depending on the specific network policies enabled. This issue only manifests when Cilium is routing IPv6 traffic and NodePorts are used to route traffic to pods. IPv6 and endpoint routes are both disabled by default. The problem has been fixed and is available on versions 1.11.15, 1.12.8, and 1.13.1. As a workaround, disable IPv6 routing.

Affected configurations

• cilium cilium (< 1.11.15) • cilium cilium (>= 1.12.0 < 1.12.8) • cilium cilium (>= 1.13.0 < 1.13.1)

Related

Weakness · CWE (2)

  • CWE-285 Improper Authorization weakness
  • CWE-863 Incorrect Authorization weakness

References