CVEs-PoC/2021/CVE-2021-23180.md

### [CVE-2021-23180](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23180)
![](https://img.shields.io/static/v1?label=Product&message=htmldoc&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-476%20-%20NULL%20Pointer%20Dereference%2C%20%20CWE-400%20-%20Uncontrolled%20Resource%20Consumption&color=brighgreen)

### Description

A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary code and denial of service.

### POC

#### Reference
- https://github.com/michaelrsweet/htmldoc/issues/418

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