GHSA-wr2v-9rpq-c35q Etcd Gateway TLS authentication only applies to endpoints detected in DNS SRV records

• Go go.etcd.io/etcd: >= 3.4.0-rc.0, < 3.4.10 → fixed in 3.4.10 • Go go.etcd.io/etcd: < 3.3.23 → fixed in 3.3.23

Vulnerability type Cryptography Workarounds Refer to the gateway documentation. The vulnerability was spotted due to unclear documentation of how the gateway handles endpoints validation. Detail When starting a gateway, TLS authentication will only be attempted on endpoints identified in DNS SRV records for a given domain, which occurs in the discoverEndpoints function. No authentication is performed against endpoints provided in the --endpoints flag. The auditors has noted that appropriate documentation of this validation functionality plus deprecation of this misleading functionality is an acceptable path forward. References Find out more on this vulnerability in the security audit report For more information If you have any questions or comments about this advisory: • Contact the etcd security committee