cve/2019/CVE-2019-16201.md

### [CVE-2019-16201](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16201)
![](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

WEBrick::HTTPAuth::DigestAuth in Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 has a regular expression Denial of Service cause by looping/backtracking. A victim must expose a WEBrick server that uses DigestAuth to the Internet or a untrusted network.

### POC

#### Reference
- https://www.oracle.com/security-alerts/cpujan2020.html

#### Github
- https://github.com/MarioBarbarino/planet.rb
- https://github.com/feedreader/planet.rb