### [CVE-2003-1564](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-1564)
![](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

libxml2, possibly before 2.5.0, does not properly detect recursion during entity expansion, which allows context-dependent attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, aka the "billion laughs attack."

### POC

#### Reference
- http://www.reddit.com/r/programming/comments/65843/time_to_upgrade_libxml2

#### Github
- https://github.com/ponypot/cve