CVEs-PoC/2021/CVE-2021-42840.md

### [CVE-2021-42840](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42840)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting. In certain circumstances involving admin account takeover, logger_file_name can refer to an attacker-controlled PHP file under the web root, because only the all-lowercase PHP file extensions were blocked. NOTE: this issue exists because of an incomplete fix for CVE-2020-28328.

### POC

#### Reference
- http://packetstormsecurity.com/files/165001/SuiteCRM-7.11.18-Remote-Code-Execution.html

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