### [CVE-2019-6706](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6706)
![](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

Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have certain relationships.

### POC

#### Reference
- http://packetstormsecurity.com/files/151335/Lua-5.3.5-Use-After-Free.html
- http://packetstormsecurity.com/files/151335/Lua-5.3.5-Use-After-Free.html
- https://www.exploit-db.com/exploits/46246/
- https://www.exploit-db.com/exploits/46246/

#### Github
- https://github.com/ARPSyndicate/cvemon