cve/2021/CVE-2021-31642.md

### [CVE-2021-31642](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31642)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

A denial of service condition exists after an integer overflow in several IoT devices from CHIYU Technology, including BIOSENSE, Webpass, and BF-630, BF-631, and SEMAC. The vulnerability can be explored by sending an unexpected integer (> 32 bits) on the page parameter that will crash the web portal and making it unavailable until a reboot of the device.

### POC

#### Reference
- http://packetstormsecurity.com/files/162934/CHIYU-IoT-Denial-Of-Service.html
- https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31642

#### Github
- https://github.com/ARPSyndicate/cvemon