CVEs-PoC/2020/CVE-2020-7457.md

### [CVE-2020-7457](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7457)
![](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=Race%20Condition&color=brighgreen)

### Description

In FreeBSD 12.1-STABLE before r359565, 12.1-RELEASE before p7, 11.4-STABLE before r362975, 11.4-RELEASE before p1, and 11.3-RELEASE before p11, missing synchronization in the IPV6_2292PKTOPTIONS socket option set handler contained a race condition allowing a malicious application to modify memory after being freed, possibly resulting in code execution.

### POC

#### Reference
- http://packetstormsecurity.com/files/158695/FreeBSD-ip6_setpktopt-Use-After-Free-Privilege-Escalation.html

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