### [CVE-2021-25829](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-25829)
![](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 improper binary stream data handling issue was found in the [core] module of ONLYOFFICE DocumentServer v4.0.0-9-v5.6.3. Using this bug, an attacker is able to produce a denial of service attack that can eventually shut down the target server.

### POC

#### Reference
- https://github.com/merrychap/poc_exploits/tree/master/ONLYOFFICE/CVE-2021-25829

#### Github
- https://github.com/konatabrk/POC-onlyoffice
- https://github.com/merrychap/POC-onlyoffice