cve/2015/CVE-2015-9253.md

### [CVE-2015-9253](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-9253)
![](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

An issue was discovered in PHP 7.3.x before 7.3.0alpha3, 7.2.x before 7.2.8, and before 7.1.20. The php-fpm master process restarts a child process in an endless loop when using program execution functions (e.g., passthru, exec, shell_exec, or system) with a non-blocking STDIN stream, causing this master process to consume 100% of the CPU, and consume disk space with a large volume of error logs, as demonstrated by an attack by a customer of a shared-hosting facility.

### POC

#### Reference
- https://www.futureweb.at/security/CVE-2015-9253/

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