CVE-2012-5975 : The SSH USERAUTH CHANGE REQUEST feature in SSH Tectia Server 6.0.4 through 6.0.2

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.

Published 2012-12-04 23:55:01

Updated 2012-12-05 05:00:00

Source MITRE

View at NVD, CVE.org

Vulnerability category: BypassGain privilege

Products affected by CVE-2012-5975

SSH » Tectia Server » Version: 6.0.4
cpe:2.3:a:ssh:tectia_server:6.0.4:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.13
cpe:2.3:a:ssh:tectia_server:6.0.13:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.12
cpe:2.3:a:ssh:tectia_server:6.0.12:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.11
cpe:2.3:a:ssh:tectia_server:6.0.11:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.7
cpe:2.3:a:ssh:tectia_server:6.0.7:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.3
cpe:2.3:a:ssh:tectia_server:6.1.3:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.2
cpe:2.3:a:ssh:tectia_server:6.1.2:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.0
cpe:2.3:a:ssh:tectia_server:6.1.0:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.6
cpe:2.3:a:ssh:tectia_server:6.1.6:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.1
cpe:2.3:a:ssh:tectia_server:6.1.1:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.18
cpe:2.3:a:ssh:tectia_server:6.0.18:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.14
cpe:2.3:a:ssh:tectia_server:6.0.14:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.6
cpe:2.3:a:ssh:tectia_server:6.0.6:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.9
cpe:2.3:a:ssh:tectia_server:6.0.9:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.7
cpe:2.3:a:ssh:tectia_server:6.1.7:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.4
cpe:2.3:a:ssh:tectia_server:6.1.4:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.2.4
cpe:2.3:a:ssh:tectia_server:6.2.4:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.2.2
cpe:2.3:a:ssh:tectia_server:6.2.2:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.3.0
cpe:2.3:a:ssh:tectia_server:6.3.0:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.5
cpe:2.3:a:ssh:tectia_server:6.0.5:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.20.
cpe:2.3:a:ssh:tectia_server:6.0.20.:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.12
cpe:2.3:a:ssh:tectia_server:6.1.12:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.9
cpe:2.3:a:ssh:tectia_server:6.1.9:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.2.1
cpe:2.3:a:ssh:tectia_server:6.2.1:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.2.0
cpe:2.3:a:ssh:tectia_server:6.2.0:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.3.2
cpe:2.3:a:ssh:tectia_server:6.3.2:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.3.1
cpe:2.3:a:ssh:tectia_server:6.3.1:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.19
cpe:2.3:a:ssh:tectia_server:6.0.19:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.17
cpe:2.3:a:ssh:tectia_server:6.0.17:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.10
cpe:2.3:a:ssh:tectia_server:6.0.10:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.0.8
cpe:2.3:a:ssh:tectia_server:6.0.8:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.8
cpe:2.3:a:ssh:tectia_server:6.1.8:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.1.5
cpe:2.3:a:ssh:tectia_server:6.1.5:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.2.5
cpe:2.3:a:ssh:tectia_server:6.2.5:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel
SSH » Tectia Server » Version: 6.2.3
cpe:2.3:a:ssh:tectia_server:6.2.3:*:*:*:*:*:*:*
Matching versions
When used together with: Linux » Linux Kernel

Exploit prediction scoring system (EPSS) score for CVE-2012-5975

EPSS FAQ

47.91%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 98 %

Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2012-5975

Tectia SSH USERAUTH Change Request Password Reset Vulnerability

Disclosure Date: 2012-12-01

First seen: 2020-04-26

exploit/unix/ssh/tectia_passwd_changereq

This module exploits a vulnerability in Tectia SSH server for Unix-based platforms. The bug is caused by a SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ request before password authentication, allowing any remote user to bypass the login routine, and then gain access as root

More information

CVSS scores for CVE-2012-5975

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
9.3	HIGH	AV:N/AC:M/Au:N/C:C/I:C/A:C	8.6	10.0	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete

CWE ids for CVE-2012-5975

CWE-287 Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2012-5975

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

metasploit-framework/tectia_passwd_changereq.rb at master · rapid7/metasploit-framework · GitHub
Exploit
http://www.exploit-db.com/exploits/23082/

(SSH.com Communications) SSH Tectia (SSH < 2.0-6.1.9.95 / Tectia 6.1.9.95) - Remote Authentication Bypass - Linux remote Exploit
http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0065.html

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