cve/2019/CVE-2019-13224.md

### [CVE-2019-13224](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-13224)
![](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

A use-after-free in onig_new_deluxe() in regext.c in Oniguruma 6.9.2 allows attackers to potentially cause information disclosure, denial of service, or possibly code execution by providing a crafted regular expression. The attacker provides a pair of a regex pattern and a string, with a multi-byte encoding that gets handled by onig_new_deluxe(). Oniguruma issues often affect Ruby, as well as common optional libraries for PHP and Rust.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/ForAllSecure/VulnerabilitiesLab
- https://github.com/balabit-deps/balabit-os-8-libonig
- https://github.com/balabit-deps/balabit-os-9-libonig
- https://github.com/deepin-community/libonig
- https://github.com/kkos/oniguruma
- https://github.com/onivim/esy-oniguruma
- https://github.com/winlibs/oniguruma