CVEs-PoC/2021/CVE-2021-20316.md

### [CVE-2021-20316](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20316)
![](https://img.shields.io/static/v1?label=Product&message=samba&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=Affects%20samba%20file%20server%20before%20v4.15.0%2C%20Fixed%20in%20samba%20v4.15.0%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-362%20-%20Concurrent%20Execution%20using%20Shared%20Resource%20with%20Improper%20Synchronization%20('Race%20Condition')&color=brightgreen)

### Description

A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.

### POC

#### Reference
- https://www.samba.org/samba/security/CVE-2021-20316.html

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