cve/2021/CVE-2021-1740.md

### [CVE-2021-1740](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1740)
![](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=tvOS&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=watchOS&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=unspecified%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=A%20local%20user%20may%20be%20able%20to%20modify%20protected%20parts%20of%20the%20file%20system&color=brightgreen)

### Description

A parsing issue in the handling of directory paths was addressed with improved path validation. This issue is fixed in Security Update 2021-002 Catalina, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. A local user may be able to modify protected parts of the file system.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/houjingyi233/macOS-iOS-system-security