cve/2018/CVE-2018-10191.md

### [CVE-2018-10191](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10191)
![](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

In versions of mruby up to and including 1.4.0, an integer overflow exists in src/vm.c::mrb_vm_exec() when handling OP_GETUPVAR in the presence of deep scope nesting, resulting in a use-after-free. An attacker that can cause Ruby code to be run can use this to possibly execute arbitrary code.

### POC

#### Reference
- https://github.com/mruby/mruby/issues/3995

#### Github
- https://github.com/nautilus-fuzz/nautilus