CVE-2024-28250: Unencrypted traffic between nodes when using WireGuard and L7 policies

March 18, 2024

In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies:

Traffic that should be WireGuard-encrypted is sent unencrypted between a node’s Envoy proxy and pods on other nodes.
Traffic that should be WireGuard-encrypted is sent unencrypted between a node’s DNS proxy and pods on other nodes.

References

github.com/advisories/GHSA-v6q2-4qr3-5cw6
github.com/cilium/cilium
github.com/cilium/cilium/security/advisories/GHSA-v6q2-4qr3-5cw6
nvd.nist.gov/vuln/detail/CVE-2024-28250

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