cve/2023/CVE-2023-5173.md

### [CVE-2023-5173](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5173)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=unspecified%3C%20118%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Out-of-bounds%20write%20in%20HTTP%20Alternate%20Services&color=brighgreen)

### Description

In a non-standard configuration of Firefox, an integer overflow could have occurred based on network traffic (possibly under influence of a local unprivileged webpage), leading to an out-of-bounds write to privileged process memory. *This bug only affects Firefox if a non-standard preference allowing non-HTTPS Alternate Services (`network.http.altsvc.oe`) is enabled.* This vulnerability affects Firefox < 118.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1823172

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