cve/2016/CVE-2016-9243.md

### [CVE-2016-9243](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9243)
![](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

HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/khodges42/Etrata