### [CVE-2011-0420](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-0420)
![](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

The grapheme_extract function in the Internationalization extension (Intl) for ICU for PHP 5.3.5 allows context-dependent attackers to cause a denial of service (crash) via an invalid size argument, which triggers a NULL pointer dereference.

### POC

#### Reference
- http://securityreason.com/achievement_securityalert/94
- http://securityreason.com/securityalert/8087
- http://www.exploit-db.com/exploits/16182

#### Github
- https://github.com/mudongliang/LinuxFlaw
- https://github.com/oneoy/cve-