CVEs-PoC/2020/CVE-2020-7461.md

### [CVE-2020-7461](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7461)
![](https://img.shields.io/static/v1?label=Product&message=FreeBSD&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Heap-based%20Buffer%20Overflow&color=brighgreen)

### Description

In FreeBSD 12.1-STABLE before r365010, 11.4-STABLE before r365011, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, dhclient(8) fails to handle certain malformed input related to handling of DHCP option 119 resulting a heap overflow. The heap overflow could in principle be exploited to achieve remote code execution. The affected process runs with reduced privileges in a Capsicum sandbox, limiting the immediate impact of an exploit.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/0xkol/freebsd-dhclient-poc
- https://github.com/ARPSyndicate/cvemon
- https://github.com/knqyf263/CVE-2020-7461
- https://github.com/nomi-sec/PoC-in-GitHub
- https://github.com/soosmile/POC