Improper Authentication Affecting go.etcd.io/etcd/v3/auth Open this link in a new tab package, versions >=3.2.0 <3.2.26 >=3.3.0 <3.3.11
Attack Complexity
Low
User Interaction
Required
Confidentiality
High
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snyk-id
SNYK-GOLANG-GOETCDIOETCDV3AUTH-1083899
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published
16 Jan 2019
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disclosed
3 Jan 2019
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credit
Matt Wheeler
Introduced: 3 Jan 2019
CVE-2018-16886 Open this link in a new tabHow 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.