CVEs-PoC/2021/CVE-2021-21899.md

### [CVE-2021-21899](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21899)
![](https://img.shields.io/static/v1?label=Product&message=LibreCAD&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-119%3A%20Improper%20Restriction%20of%20Operations%20within%20the%20Bounds%20of%20a%20Memory%20Buffer&color=brighgreen)

### Description

A code execution vulnerability exists in the dwgCompressor::copyCompBytes21 functionality of LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580. A specially-crafted .dwg file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

### POC

#### Reference
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1350

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