Impact
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.
Patches
This issue affects:
- In native routing mode (
routingMode=native):
- Cilium v1.14 versions before v1.14.8
- Cilium v1.15 versions before v1.15.2
- In tunneling mode (
routingMode=tunnel):
- Cilium v1.14 versions before v1.14.4
- Cilium v1.14.4 if
encryption.wireguard.encapsulate is set to false (default).
This issue has been resolved in:
- In native routing mode (
routingMode=native):
- Cilium v1.14.8
- Cilium v1.15.2
- In tunneling mode (
routingMode=tunnel):
- Cilium v1.14.4. NOTE
encryption.wireguard.encapsulate must be set to true.
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 @brb, @giorio94, @gandro and @jschwinger233 for their work on triaging and remediating this issue.
For more information
If you have any questions or comments about this advisory, please reach out on Slack.
If you think you found a related vulnerability, we strongly encourage you to report security vulnerabilities to our private security mailing list at security@cilium.io. This is a private mailing list where only members of the Cilium internal security team are subscribed to, and your report will be treated as top priority.
giorio94 Finder
brb Remediation developer
jschwinger233 Remediation reviewer
Impact
In Cilium clusters with WireGuard enabled and traffic matching Layer 7 policies:
Patches
This issue affects:
routingMode=native):routingMode=tunnel):encryption.wireguard.encapsulateis set tofalse(default).This issue has been resolved in:
routingMode=native):routingMode=tunnel):encryption.wireguard.encapsulatemust be set totrue.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 @brb, @giorio94, @gandro and @jschwinger233 for their work on triaging and remediating this issue.
For more information
If you have any questions or comments about this advisory, please reach out on Slack.
If you think you found a related vulnerability, we strongly encourage you to report security vulnerabilities to our private security mailing list at security@cilium.io. This is a private mailing list where only members of the Cilium internal security team are subscribed to, and your report will be treated as top priority.