cve/2021/CVE-2021-34561.md

### [CVE-2021-34561](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34561)
![](https://img.shields.io/static/v1?label=Product&message=WHA-GW-F2D2-0-AS-%20Z2-ETH&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=WHA-GW-F2D2-0-AS-%20Z2-ETH.EIP&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=3.0.8%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-350%20Reliance%20on%20Reverse%20DNS%20Resolution%20for%20a%20Security-Critical%20Action&color=brightgreen)

### Description

In PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.8 serious issue exists, if the application is not externally accessible or uses IP-based access restrictions. Attackers can use DNS Rebinding to bypass any IP or firewall based access restrictions that may be in place, by proxying through their target's browser.

### POC

#### Reference
- https://cert.vde.com/en-us/advisories/vde-2021-027

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