cve/2021/CVE-2021-30737.md

### [CVE-2021-30737](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30737)
![](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=Version&message=%3C%2011.4%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2012.5%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2014.6%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%207.5%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Processing%20a%20maliciously%20crafted%20certificate%20may%20lead%20to%20arbitrary%20code%20execution&color=brighgreen)

### Description

A memory corruption issue in the ASN.1 decoder was addressed by removing the vulnerable code. This issue is fixed in tvOS 14.6, Security Update 2021-004 Mojave, iOS 14.6 and iPadOS 14.6, iOS 12.5.4, Security Update 2021-003 Catalina, macOS Big Sur 11.4, watchOS 7.5. Processing a maliciously crafted certificate may lead to arbitrary code execution.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/Siguza/ios-resources
- https://github.com/Swordfish-Security/awesome-ios-security
- https://github.com/annapustovaya/Mobix
- https://github.com/tr3ss/gofetch