GHSA-wr2v-9rpq-c35q

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GHSA-wr2v-9rpq-c35q

Summary: Etcd Gateway TLS authentication only applies to endpoints detected in DNS SRV records

Details: ### Vulnerability type Cryptography ### Workarounds Refer to the [gateway documentation](https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/gateway.md). 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](https://github.com/etcd-io/etcd/blob/master/security/SECURITY_AUDIT.pdf) ### For more information If you have any questions or comments about this advisory: * Contact the [etcd security committee](https://github.com/etcd-io/etcd/blob/master/security/security-release-process.md#product-security-committee-psc)

References: https://github.com/etcd-io/etcd/security/advisories/GHSA-wr2v-9rpq-c35q, https://nvd.nist.gov/vuln/detail/CVE-2020-15136, https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/gateway.md, https://lists.fedoraproject.org/archives/list/[email protected]/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP