### [CVE-2019-20634](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20634)
![](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

An issue was discovered in Proofpoint Email Protection through 2019-09-08. By collecting scores from Proofpoint email headers, it is possible to build a copy-cat Machine Learning Classification model and extract insights from this model. The insights gathered allow an attacker to craft emails that receive preferable scores, with a goal of delivering malicious emails.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/gmh5225/Awesome-ML-Security_
- https://github.com/moohax/Proof-Pudding
- https://github.com/trailofbits/awesome-ml-security