cve/2023/CVE-2023-4255.md

### [CVE-2023-4255](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4255)
![](https://img.shields.io/static/v1?label=Product&message=Extra%20Packages%20for%20Enterprise%20Linux&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Fedora&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=w3m&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Out-of-bounds%20Write&color=brighgreen)

### Description

An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially crafted HTML file to the w3m binary. Exploitation of this flaw could lead to application crashes, resulting in a denial of service condition.

### POC

#### Reference
- https://github.com/tats/w3m/issues/268

#### Github
- https://github.com/NaInSec/CVE-LIST
- https://github.com/fkie-cad/nvd-json-data-feeds