GHSA-q7w8-72mr-vpgw
Policy bypass for Host Firewall policy due to race condition in Cilium agent
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/cilium/cilium | < 1.14.14 | 1.14.14 |
| Go | github.com/cilium/cilium | >= 1.15.0, < 1.15.8 | 1.15.8 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
A race condition in the Cilium agent can cause the agent to ignore labels that should be applied to a node. This could in turn cause CiliumClusterwideNetworkPolicies intended for nodes with the ignored label to not apply, leading to policy bypass.
### Patches
This issue was fixed in https://github.com/cilium/cilium/pull/33511.
This issue affects:
- All versions of Cilium before v1.14.14
- Cilium v1.15 between v1.15.0 and v1.15.7 inclusive
This issue has been patched in:
- Cilium v1.14.14
- Cilium v1.15.8
### Workarounds
As the underlying issue depends on a race condition, users unable to upgrade can restart the Cilium agent on affected nodes until the affected policies are confirmed to be working as expected.
### Acknowledgements
The Cilium community has worked together with members of Google and Isovalent to prepare these mitigations. Special thanks to @skmatti for raising 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 affecting Cilium, we strongly encourage you to report it to our security mailing list at [[email protected]](mailto:[email protected]). This is a private mailing list for the Cilium security team, and your report will be treated as top priority.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/cilium/cilium/security/advisories/GHSA-q7w8-72mr-vpgw
- https://nvd.nist.gov/vuln/detail/CVE-2024-42488
- https://github.com/cilium/cilium/pull/33511
- https://github.com/cilium/cilium/commit/7877db09b3f34d3081a1d66459b8fa6603dc3d30
- https://github.com/cilium/cilium/commit/aa44dd148a9be95e07782e4f990e61678ef0abf8
- https://github.com/cilium/cilium/commit/f81a1ee0cfdec928980db8640def984b2eeaa134
- https://github.com/cilium/cilium