cve/2021/CVE-2021-43399.md

### [CVE-2021-43399](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43399)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The Yubico YubiHSM YubiHSM2 library 2021.08, included in the yubihsm-shell project, does not properly validate the length of some operations including SSH signing requests, and some data operations received from a YubiHSM 2 device.

### POC

#### Reference
- https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/

#### Github
No PoCs found on GitHub currently.