cve/2021/CVE-2021-32066.md

### [CVE-2021-32066](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32066)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a "StartTLS stripping attack."

### POC

#### Reference
- https://www.oracle.com/security-alerts/cpuapr2022.html

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