fkie_cve-2024-28249

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.13.13, 1.14.8, and 1.15.2, in Cilium clusters with IPsec enabled and traffic matching Layer 7 policies, IPsec-eligible traffic between a node's Envoy proxy and pods on other nodes is sent unencrypted and IPsec-eligible traffic between a node's DNS proxy and pods on other nodes is sent unencrypted. This issue has been resolved in Cilium 1.15.2, 1.14.8, and 1.13.13. There is no known workaround for this issue.

GHSA-j89h-qrvr-xc36 — Unencrypted traffic between nodes when using IPsec and L7 policies

Affected: Go: github.com/cilium/cilium

### Impact

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

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

**Note:** For clusters running in native routing mode, IPsec encryption is not applied to connections which are selected by a L7 Egress Network Policy or a DNS Policy. This is a known limitation of Cilium's IPsec encryption which will continue to apply after upgrading to the latest Cilium versions described below.

### Patches

This issue affects:

- Cilium v1.15 before v1.15.2 - Cilium v1.14 before v1.14.8 - Cilium v1.13 before v1.13.13 - Cilium v1.4 to v1.12 inclusive

This issue has been resolved in:

- Cilium v1.15.2 - Cilium v1.14.8 - Cilium v1.13.13

### Workarounds There is no workaround to this issue.

### Acknowledgements The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @jschwinger233, @julianwiedmann, @giorio94, and @jrajahalme for their work in triaging and resolving this issue.

### For more information If you have any questions or comments about this advisory, please reach out on [Slack](https://docs.cilium.io/en/latest/community/community/#slack).

If you think you have found a vulnerability in Cilium, we strongly encourage you to report it to our private security mailing list at…

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