CVE-2012-5975
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.
Key facts
- CVSS score
- 9.3 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C- Weakness (CWE)
- CWE-287
- EPSS score
- 35.9% (98th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2012-5849)
- Published
- December 4, 2012
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2012-5849 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2024.
View on the EU Vulnerability DatabaseAffected products
- linux / linux kernel
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
- ssh / tectia server
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(Exploit)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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