### [CVE-2017-9229](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9229)
![](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 6.2.0, as used in Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP through 7.1.5. A SIGSEGV occurs in left_adjust_char_head() during regular expression compilation. Invalid handling of reg->dmax in forward_search_range() could result in an invalid pointer dereference, normally as an immediate denial-of-service condition.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/balabit-deps/balabit-os-7-libonig
- https://github.com/balabit-deps/balabit-os-8-libonig
- https://github.com/onivim/esy-oniguruma