UNKNOWN CVSS 7.5
Published: 1999-01-26

CVE-1999-0450

microsoft internet_information_server Security Advisory (CVE-1999-0450)
↗ Official NIST NVD Record
Seeking technical exploit breakdowns or verified PoC code for CVE-1999-0450?
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-1999-0450 impacting microsoft internet_information_server. Evaluated with CVSS Base Score of 7.5 (UNKNOWN).

Original NVD Description

Source: NIST NVD
In IIS, an attacker could determine a real path using a request for a non-existent URL that would be interpreted by Perl (perl.exe).

📊 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 / internet_information_server
Affected Versions 3.0
Weakness Enumeration NVD-CWE-Other

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-1999-0450 impacting microsoft internet_information_server.

⚡ Nuclei Detection Template (YAML) cve-1999-0450.yaml
id: cve-1999-0450

info:
  name: microsoft internet_information_server - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: unknown
  description: |
    Automated signature & scanner for CVE-1999-0450 affecting microsoft internet_information_server.
    Evaluation: In IIS, an attacker could determine a real path using a request for a non-existent URL that would be interpreted by Perl (perl.exe)....
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-1999-0450
  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-1999-0450
    cwe-id: NVD-CWE-Other
  tags: cve,cve-1999-0450,microsoft,internet_information_serv,unknown

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "internet_information_server"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-1999-0450.py
# Proof-of-Concept Exploit & Verification Probe for CVE-1999-0450
# Target: microsoft internet_information_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-1999-0450 (microsoft internet_information_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 internet_information_server scope (3.0).")
        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-1999-0450.sh
# Recommended Remediation & Patching Commands for CVE-1999-0450
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install internet_information_serv 2>/dev/null || \
sudo dnf upgrade internet_information_serv 2>/dev/null || \
sudo yum update internet_information_serv

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

# 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.

🔗 Verified Technical References

Authorities
  • No records filed in this category.
Distributions
  • No records filed in this category.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-1999-0450 in microsoft internet_information_server?

Review vendor-specific security notices and update microsoft internet_information_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-1999-0450?

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-1999-0450?

CVE-1999-0450 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-1999-0450
Weakness NVD-CWE-Other
Vendor microsoft
Product internet_information_server
Published 1999-01-26
Vector AV:N/AC:L/Au:N/C:P/I:P/A:P