CVEs-PoC/2021/CVE-2021-28683.md

### [CVE-2021-28683](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28683)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received.

### POC

#### Reference
- https://blog.envoyproxy.io

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