### [CVE-2016-9920](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9920)
![](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

steps/mail/sendmail.inc in Roundcube before 1.1.7 and 1.2.x before 1.2.3, when no SMTP server is configured and the sendmail program is enabled, does not properly restrict the use of custom envelope-from addresses on the sendmail command line, which allows remote authenticated users to execute arbitrary code via a modified HTTP request that sends a crafted e-mail message.

### POC

#### Reference
- https://blog.ripstech.com/2016/roundcube-command-execution-via-email/

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/CVEDB/awesome-cve-repo
- https://github.com/CVEDB/top
- https://github.com/GhostTroops/TOP
- https://github.com/NCSU-DANCE-Research-Group/CDL
- https://github.com/anquanscan/sec-tools
- https://github.com/hktalent/TOP
- https://github.com/t0kx/exploit-CVE-2016-9920