CVEs-PoC/2021/CVE-2021-27705.md

### [CVE-2021-27705](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27705)
![](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

Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"qosIndex "request. This occurs because the "formQOSRuleDel" function directly passes the parameter "qosIndex" to strcpy without limit.

### POC

#### Reference
- https://hackmd.io/Zb7lfFaNR0ScpaTssECFbg

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