CVEs-PoC/2021/CVE-2021-39593.md

### [CVE-2021-39593](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39593)
![](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 NULL pointer dereference exists in the function swf_FontExtract_DefineFontInfo() located in swftext.c. It allows an attacker to cause Denial of Service.

### POC

#### Reference
- https://github.com/matthiaskramm/swftools/issues/139

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