cve/2019/CVE-2019-19203.md

### [CVE-2019-19203](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19203)
![](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 Oniguruma 6.x before 6.9.4_rc2. In the function gb18030_mbc_enc_len in file gb18030.c, a UChar pointer is dereferenced without checking if it passed the end of the matched string. This leads to a heap-based buffer over-read.

### POC

#### Reference
- https://github.com/ManhNDd/CVE-2019-19203
- https://github.com/kkos/oniguruma/issues/163
- https://github.com/tarantula-team/CVE-2019-19203

#### Github
- https://github.com/0xT11/CVE-POC
- https://github.com/ARPSyndicate/cvemon
- https://github.com/ManhNDd/CVE-2019-19203
- 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/developer3000S/PoC-in-GitHub
- https://github.com/hectorgie/PoC-in-GitHub
- https://github.com/kkos/oniguruma
- https://github.com/onivim/esy-oniguruma
- https://github.com/tarantula-team/CVE-2019-19203
- https://github.com/winlibs/oniguruma