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Vulnerability Details : CVE-2012-5975 (1 public exploit)

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.
Publish Date : 2012-12-04 Last Update Date : 2012-12-05
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- CVSS Scores & Vulnerability Types

CVSS Score
9.3
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access Admin
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 287

- Products Affected By CVE-2012-5975

# Product Type Vendor Product Version Update Edition Language
1 Application SSH Tectia Server 6.0.4 Version Details Vulnerabilities
2 Application SSH Tectia Server 6.0.5 Version Details Vulnerabilities
3 Application SSH Tectia Server 6.0.6 Version Details Vulnerabilities
4 Application SSH Tectia Server 6.0.7 Version Details Vulnerabilities
5 Application SSH Tectia Server 6.0.8 Version Details Vulnerabilities
6 Application SSH Tectia Server 6.0.9 Version Details Vulnerabilities
7 Application SSH Tectia Server 6.0.10 Version Details Vulnerabilities
8 Application SSH Tectia Server 6.0.11 Version Details Vulnerabilities
9 Application SSH Tectia Server 6.0.12 Version Details Vulnerabilities
10 Application SSH Tectia Server 6.0.13 Version Details Vulnerabilities
11 Application SSH Tectia Server 6.0.14 Version Details Vulnerabilities
12 Application SSH Tectia Server 6.0.17 Version Details Vulnerabilities
13 Application SSH Tectia Server 6.0.18 Version Details Vulnerabilities
14 Application SSH Tectia Server 6.0.19 Version Details Vulnerabilities
15 Application SSH Tectia Server 6.0.20. Version Details Vulnerabilities
16 Application SSH Tectia Server 6.1.0 Version Details Vulnerabilities
17 Application SSH Tectia Server 6.1.1 Version Details Vulnerabilities
18 Application SSH Tectia Server 6.1.2 Version Details Vulnerabilities
19 Application SSH Tectia Server 6.1.3 Version Details Vulnerabilities
20 Application SSH Tectia Server 6.1.4 Version Details Vulnerabilities
21 Application SSH Tectia Server 6.1.5 Version Details Vulnerabilities
22 Application SSH Tectia Server 6.1.6 Version Details Vulnerabilities
23 Application SSH Tectia Server 6.1.7 Version Details Vulnerabilities
24 Application SSH Tectia Server 6.1.8 Version Details Vulnerabilities
25 Application SSH Tectia Server 6.1.9 Version Details Vulnerabilities
26 Application SSH Tectia Server 6.1.12 Version Details Vulnerabilities
27 Application SSH Tectia Server 6.2.0 Version Details Vulnerabilities
28 Application SSH Tectia Server 6.2.1 Version Details Vulnerabilities
29 Application SSH Tectia Server 6.2.2 Version Details Vulnerabilities
30 Application SSH Tectia Server 6.2.3 Version Details Vulnerabilities
31 Application SSH Tectia Server 6.2.4 Version Details Vulnerabilities
32 Application SSH Tectia Server 6.2.5 Version Details Vulnerabilities
33 Application SSH Tectia Server 6.3.0 Version Details Vulnerabilities
34 Application SSH Tectia Server 6.3.1 Version Details Vulnerabilities
35 Application SSH Tectia Server 6.3.2 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
SSH Tectia Server 35

- References For CVE-2012-5975

http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0013.html
FULLDISC 20121201 SSH.com Communications SSH Tectia Authentication Bypass Remote Zeroday Exploit
http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0065.html
FULLDISC 20121203 Re: SSH.com Communications SSH Tectia Authentication Bypass Remote Zeroday Exploit (king cope)
Exploit! http://www.exploit-db.com/exploits/23082
EXPLOIT-DB 23082 SSH.com Communications SSH Tectia Authentication Bypass Remote Exploit (0day) Author:kingcope Release Date:2012-12-02 (linux) remote
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/ssh/tectia_passwd_changereq.rb

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)

- Metasploit Modules Related To CVE-2012-5975

Tectia SSH USERAUTH Change Request Password Reset Vulnerability
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.
Module type : exploit Rank : excellent Platforms : Unix


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