CVE-2024-28250

low-risk

Published 2024-03-18

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.8 and 1.15.2, In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies Wireguard-eligible traffic that is sent between a node's Envoy proxy and pods on other nodes is sent unencrypted and Wireguard-eligible traffic that is sent between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.14.8 and 1.15.2 in in native routing mode (`routingMode=native`) and in Cilium 1.14.4 in tunneling mode (`routingMode=tunnel`). Not that in tunneling mode, `encryption.wireguard.encapsulate` must be set to `true`. There is no known workaround for this issue.

Do I need to act?

0.05% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 6.1/10 Medium

ADJACENT_NETWORK / HIGH complexity

Affected Products (1)

Cilium

Affected Vendors

Cilium

References (8)

Release Notes https://github.com/cilium/cilium/releases/tag/v1.13.13

Release Notes https://github.com/cilium/cilium/releases/tag/v1.14.8

Release Notes https://github.com/cilium/cilium/releases/tag/v1.15.2

Vendor Advisory https://github.com/cilium/cilium/security/advisories/GHSA-v6q2-4qr3-5cw6

Release Notes https://github.com/cilium/cilium/releases/tag/v1.13.13

Release Notes https://github.com/cilium/cilium/releases/tag/v1.14.8

Release Notes https://github.com/cilium/cilium/releases/tag/v1.15.2

Vendor Advisory https://github.com/cilium/cilium/security/advisories/GHSA-v6q2-4qr3-5cw6

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low-risk

Severity 16/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal