etcd is a distributed key-value store for the data of a distributed system. Prior to 3.5.32 and 3.6.13, when etcd is configured with –listen-client-http-urls to split HTTP and gRPC client endpoints onto separate listeners, the –client-crl-file Certificate Revocation List is not enforced on the gRPC listener, allowing a client with a revoked certificate to authenticate successfully over gRPC. This issue is fixed in versions 3.5.32 and 3.6.13.
Weakness
The product does not validate, or incorrectly validates, a certificate.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Etcd | Etcd | * | 3.5.32 (excluding) |
| Etcd | Etcd | 3.6.0 (including) | 3.6.13 (excluding) |
| Etcd | Ubuntu | questing | * |
Potential Mitigations
Related Attack Patterns
References
- https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef
- https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f
- https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb
- https://github.com/etcd-io/etcd/pull/22007
- https://github.com/etcd-io/etcd/pull/22021
- https://github.com/etcd-io/etcd/pull/22025
- https://github.com/etcd-io/etcd/releases/tag/v3.5.32
- https://github.com/etcd-io/etcd/releases/tag/v3.6.13
- https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92