CVEs-PoC/2011/CVE-2011-1431.md

### [CVE-2011-1431](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1431)
![](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

The STARTTLS implementation in qmail-smtpd.c in qmail-smtpd in the netqmail-1.06-tls patch for netqmail 1.06 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.

### POC

#### Reference
- http://securityreason.com/securityalert/8144

#### Github
No PoCs found on GitHub currently.