CVEs-PoC/2021/CVE-2021-39569.md

### [CVE-2021-39569](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39569)
![](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 swftools through 20200710. A heap-buffer-overflow exists in the function OpAdvance() located in swfaction.c. It allows an attacker to cause code Execution.

### POC

#### Reference
- https://github.com/matthiaskramm/swftools/issues/114

#### Github
- https://github.com/seviezhou/Kraken