cve/2021/CVE-2021-3578.md

### [CVE-2021-3578](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3578)
![](https://img.shields.io/static/v1?label=Product&message=isync&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-704&color=brighgreen)

### Description

A flaw was found in mbsync before v1.3.6 and v1.4.2, where an unchecked pointer cast allows a malicious or compromised server to write an arbitrary integer value past the end of a heap-allocated structure by issuing an unexpected APPENDUID response. This could be plausibly exploited for remote code execution on the client.

### POC

#### Reference
- https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/

#### Github
No PoCs found on GitHub currently.