cve/2017/CVE-2017-5340.md

### [CVE-2017-5340](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5340)
![](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

Zend/zend_hash.c in PHP before 7.0.15 and 7.1.x before 7.1.1 mishandles certain cases that require large array allocations, which allows remote attackers to execute arbitrary code or cause a denial of service (integer overflow, uninitialized memory access, and use of arbitrary destructor function pointers) via crafted serialized data.

### POC

#### Reference
- https://bugs.php.net/bug.php?id=73832
- https://hackerone.com/reports/195950

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/mrash/afl-cve