UNKNOWN CVSS 7.5
Published: 1999-09-20

CVE-1999-0909

microsoft terminal_server Security Advisory (CVE-1999-0909)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-1999-0909 impacting microsoft terminal_server. Evaluated with CVSS Base Score of 7.5 (UNKNOWN).

Original NVD Description

Source: NIST NVD
Multihomed Windows systems allow a remote attacker to bypass IP source routing restrictions via a malformed packet with IP options, aka the "Spoofed Route Pointer" vulnerability.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
Low (AC:L)
No specialized conditions required

🎯 Affected Versions Matrix

Affected Product microsoft / terminal_server
Affected Versions *
Weakness Enumeration CWE-264

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-1999-0909 impacting microsoft terminal_server.

⚡ Nuclei Detection Template (YAML) cve-1999-0909.yaml
id: cve-1999-0909

info:
  name: microsoft terminal_server - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: unknown
  description: |
    Automated signature & scanner for CVE-1999-0909 affecting microsoft terminal_server.
    Evaluation: Multihomed Windows systems allow a remote attacker to bypass IP source routing restrictions via a malformed packet with IP options, aka the "Spoo...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-1999-0909
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/Au:N/C:P/I:P/A:P
    cvss-score: 7.5
    cve-id: CVE-1999-0909
    cwe-id: CWE-264
  tags: cve,cve-1999-0909,microsoft,terminal_server,unknown

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "terminal_server"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-1999-0909.py
# Proof-of-Concept Exploit & Verification Probe for CVE-1999-0909
# Target: microsoft terminal_server | CVSS: 7.5 (UNKNOWN)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-1999-0909 (microsoft terminal_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 microsoft terminal_server scope (*).")
        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-1999-0909.sh
# Recommended Remediation & Patching Commands for CVE-1999-0909
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install terminal_server 2>/dev/null || \
sudo dnf upgrade terminal_server 2>/dev/null || \
sudo yum update terminal_server

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i terminal_server 2>/dev/null || rpm -qa | grep -i terminal_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-1999-0909 in microsoft terminal_server?

Review vendor-specific security notices and update microsoft terminal_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-1999-0909?

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-1999-0909?

CVE-1999-0909 is classified with a CVSS 3.1 Base Score of 7.5 (UNKNOWN). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
7.5
UNKNOWN SEVERITY
CVE ID CVE-1999-0909
Weakness CWE-264
Vendor microsoft
Product terminal_server
Published 1999-09-20
Vector AV:N/AC:L/Au:N/C:P/I:P/A:P