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Security Advisories: GSA_kwCzR0hTQS1oOGc5LTZndmgtNW1yY84AAvLt

etcd vulnerable to TOCTOU of gateway endpoint authentication

Vulnerability type



Refer to the gateway documentation. The vulnerability was spotted due to unclear documentation of how the gateway handles endpoints validation.


The gateway only authenticates endpoints detected from DNS SRV records, and it only authenticates the detected endpoints once. Therefore, if an endpoint changes its authentication settings, the gateway will continue to assume the endpoint is still authenticated. The auditors has noted that appropriate documentation of this validation functionality plus deprecation of this misleading functionality is an acceptable path forward.


Find out more on this vulnerability in the security audit report

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Source: GitHub Advisory Database
Origin: Unspecified
Severity: Low
Classification: General
Published: 12 months ago
Updated: 9 months ago

Identifiers: GHSA-h8g9-6gvh-5mrc

Affected Packages
Versions: < 3.3.23, >= 3.4.0, < 3.4.10
Fixed in: 3.3.23, 3.4.10