UNKNOWN CVSS 9.3
Published: 2012-12-04

CVE-2012-5975

ssh tectia_server Security Advisory (CVE-2012-5975)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2012-5975 impacting ssh tectia_server. Evaluated with CVSS Base Score of 9.3 (UNKNOWN).

Original NVD Description

Source: NIST NVD
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.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries

🎯 Affected Versions Matrix

Affected Product ssh / tectia_server
Affected Versions 6.0.4
Weakness Enumeration CWE-287

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2012-5975 impacting ssh tectia_server.

⚡ Nuclei Detection Template (YAML) cve-2012-5975.yaml
id: cve-2012-5975

info:
  name: ssh tectia_server - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: unknown
  description: |
    Automated signature & scanner for CVE-2012-5975 affecting ssh tectia_server.
    Evaluation: 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 ...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2012-5975
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:M/Au:N/C:C/I:C/A:C
    cvss-score: 9.3
    cve-id: CVE-2012-5975
    cwe-id: CWE-287
  tags: cve,cve-2012-5975,ssh,tectia_server,unknown

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "tectia_server"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2012-5975.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2012-5975
# Target: ssh tectia_server | CVSS: 9.3 (UNKNOWN)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2012-5975 (ssh tectia_server)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against ssh tectia_server scope (6.0.4).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2012-5975.sh
# Recommended Remediation & Patching Commands for CVE-2012-5975
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install tectia_server 2>/dev/null || \
sudo dnf upgrade tectia_server 2>/dev/null || \
sudo yum update tectia_server

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i tectia_server 2>/dev/null || rpm -qa | grep -i tectia_server

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2012-5975 in ssh tectia_server?

Review vendor-specific security notices and update ssh tectia_server packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2012-5975?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2012-5975?

CVE-2012-5975 is classified with a CVSS 3.1 Base Score of 9.3 (UNKNOWN). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
9.3
UNKNOWN SEVERITY
CVE ID CVE-2012-5975
Weakness CWE-287
Vendor ssh
Product tectia_server
Published 2012-12-04
Vector AV:N/AC:M/Au:N/C:C/I:C/A:C