CVEs-PoC/2021/CVE-2021-31878.md

### [CVE-2021-31878](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31878)
![](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 PJSIP in Asterisk before 16.19.1 and before 18.5.1. To exploit, a re-INVITE without SDP must be received after Asterisk has sent a BYE request.

### POC

#### Reference
- http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html

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