Improper Authentication Affecting go.etcd.io/etcd/v3/auth package, versions >=3.2.0 <3.2.26 >=3.3.0 <3.3.11


0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High
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NVD
8.1 high

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  • Snyk ID SNYK-GOLANG-GOETCDIOETCDV3AUTH-1083899
  • published 16 Jan 2019
  • disclosed 3 Jan 2019
  • credit Matt Wheeler

How to fix?

Upgrade go.etcd.io/etcd/v3/auth to version 3.2.26, 3.3.11 or higher.

Overview

Affected versions of this package are vulnerable to Improper Authentication. If an etcd client server TLS certificate contains a Common Name (CN) which matches a valid RBAC username, a remote attacker may authenticate as that user with any valid (trusted) client certificate in a REST API request to the gRPC-gateway.

Note: This is possible only when role-based access control (RBAC) is used and client-cert-auth is enabled.