### [CVE-2012-5975](https://www.cve.org/CVERecord?id=CVE-2012-5975)
![](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=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

The SSH USERAUTH CHANGE REQUEST feature in SSH Tectia Server 6.0.4 through 6.0.20, 6.1.0 through 6.1.12, 6.2.0 through 6.2.5, and 6.3.0 through 6.3.2 on UNIX and Linux, when old-style password authentication is enabled, allows remote attackers to bypass authentication via a crafted session involving entry of blank passwords, as demonstrated by a root login session from a modified OpenSSH client with an added input_userauth_passwd_changereq call in sshconnect2.c.

### POC

#### Reference
- http://www.exploit-db.com/exploits/23082/
- http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0065.html
- http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0013.html

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

#### ExploitDB
- https://www.exploit-db.com/exploits/23156
- https://www.exploit-db.com/exploits/23082

#### Metasploit
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/ssh/tectia_passwd_changereq.rb