cve/2004/CVE-2004-2771.md

### [CVE-2004-2771](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-2771)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20n%2Fa%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The expand function in fio.c in Heirloom mailx 12.5 and earlier and BSD mailx 8.1.2 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in an email address.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/Eli-the-Bearded/heirloom-mailx