cve/2021/CVE-2021-1878.md

### [CVE-2021-1878](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1878)
![](https://img.shields.io/static/v1?label=Product&message=macOS&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2011.3%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%202021%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=An%20attacker%20in%20a%20privileged%20network%20position%20may%20be%20able%20to%20leak%20sensitive%20user%20information&color=brighgreen)

### Description

An integer overflow was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. An attacker in a privileged network position may be able to leak sensitive user information.

### POC

#### Reference
No PoCs from references.

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