cve/2021/CVE-2021-30949.md

### [CVE-2021-30949](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30949)
![](https://img.shields.io/static/v1?label=Product&message=iOS%20and%20iPadOS&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=macOS&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=watchOS&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2011.6%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2012.1%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2015.2%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%202021%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%208.3%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=A%20malicious%20application%20may%20be%20able%20to%20execute%20arbitrary%20code%20with%20kernel%20privileges&color=brighgreen)

### Description

A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. A malicious application may be able to execute arbitrary code with kernel privileges.

### POC

#### Reference
- http://packetstormsecurity.com/files/165670/XNU-Kernel-mach_msg-Use-After-Free.html

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