cve/2018/CVE-2018-16886.md

### [CVE-2018-16886](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16886)
![](https://img.shields.io/static/v1?label=Product&message=etcd%3A&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-287&color=brighgreen)

### Description

etcd versions 3.2.x before 3.2.26 and 3.3.x before 3.3.11 are vulnerable to an improper authentication issue when role-based access control (RBAC) is used and client-cert-auth is enabled. 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.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/sonatype-nexus-community/nancy