CVE-2023-27594mediumCWE-285

CVE-2023-27594: medium-severity vulnerability in cilium

Cilium vulnerable to potential network policy bypass when routing IPv6 traffic

Published · Updated

Follow this CVE+ Monitor cilium+ Monitor github.com/cilium/cilium

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.2epss 0.6%
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.
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected products
cilium · cilium
Related CVEs — cilium

In the same product, most dangerous first.

CVE-2023-27595MEDIUMCilium eBPF filters may be temporarily removed during agent restartEPSS 0.7%CVE-2023-30851LOWPotential HTTP policy bypass when using header rules in CiliumEPSS 0.7%CVE-2024-28248HIGHCilium intermittent HTTP policy bypassEPSS 0.6%CVE-2024-42486MEDIUMCilium vulnerable to information leakage via incorrect ReferenceGrant update logic in Gateway APIEPSS 0.6%CVE-2023-39347HIGHCilium NetworkPolicy bypass via pod labelsEPSS 0.6%CVE-2024-42487MEDIUMCilium's Gateway API route matching order contradicts specificationEPSS 0.5%