CVE-2012-5975 EXPLOIT
9.3
HIGH · CVSS 2.0 · EPSS 35.9% (pctl 98)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 9.3 (HIGH, v2.0) |
|---|---|
| Vector | AV:N/AC:M/Au:N/C:C/I:C/A:C |
| EPSS | 35.87% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-287 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2012-12-04 |
| Last modified | 2026-06-16 |
Affected (2)
| Vendor | Product |
|---|---|
| linux | linux kernel |
| ssh | tectia server |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | (SSH.com Communications) SSH Tectia - USERAUTH Change Request Password Reset (Metasploit) | 2012-12-05 |
| exploit-db | (SSH.com Communications) SSH Tectia (SSH < 2.0-6.1.9.95 / Tectia 6.1.9.95) - Remote Authentication Bypass | 2012-12-02 |
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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