cve/2018/CVE-2018-16648.md

### [CVE-2018-16648](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16648)
![](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 Artifex MuPDF 1.13.0, the fz_append_byte function in fitz/buffer.c allows remote attackers to cause a denial of service (segmentation fault) via a crafted pdf file. This is caused by a pdf/pdf-device.c pdf_dev_alpha array-index underflow.

### POC

#### Reference
- https://bugs.ghostscript.com/show_bug.cgi?id=699685

#### Github
- https://github.com/0xCyberY/CVE-T4PDF
- https://github.com/ARPSyndicate/cvemon