CVEs-PoC/2021/CVE-2021-20206.md

### [CVE-2021-20206](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20206)
![](https://img.shields.io/static/v1?label=Product&message=containernetworking-cni&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=containernetworking%2Fcni%200.8.1%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-20-%3ECWE-22&color=brightgreen)

### Description

An improper limitation of path name flaw was found in containernetworking/cni in versions before 0.8.1. When specifying the plugin to load in the 'type' field in the network configuration, it is possible to use special elements such as "../" separators to reference binaries elsewhere on the system. This flaw allows an attacker to execute other existing binaries other than the cni plugins/types, such as 'reboot'. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cve-scores
- https://github.com/ruromero/vulnerability-analysis-scripts