cve/2017/CVE-2017-14639.md

### [CVE-2017-14639](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14639)
![](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

AP4_VisualSampleEntry::ReadFields in Core/Ap4SampleEntry.cpp in Bento4 1.5.0-617 uses incorrect character data types, which causes a stack-based buffer underflow and out-of-bounds write, leading to denial of service (application crash) or possibly unspecified other impact.

### POC

#### Reference
- https://blogs.gentoo.org/ago/2017/09/14/bento4-stack-based-buffer-underflow-in-ap4_visualsampleentryreadfields-ap4sampleentry-cpp/
- https://github.com/axiomatic-systems/Bento4/issues/190

#### Github
- https://github.com/mudongliang/LinuxFlaw
- https://github.com/oneoy/cve-