CVE-2012-5975 Information

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.

Reference

http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0013.html http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0065.html http://www.exploit-db.com/exploits/23082/ https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/ssh/tectia_passwd_changereq.rb