What’s Vulnerable › Vulnerabilities

CVE-2012-5975

• Severity: critical (CVSS 9.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 35.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2012-12-04 · updated 2026-06-16
• Weakness: CWE-287

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.

Affected products

• SSH Tectia Server: 6.0.4, 6.0.5, 6.0.6, 6.0.7, 6.0.8, 6.0.9 (+29)

References

• 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
• 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

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