UNKNOWN CVSS 2.1
Published: 1999-12-31

CVE-1999-1476

intel pentium Security Advisory (CVE-1999-1476)
↗ Official NIST NVD Record
Seeking technical exploit breakdowns or verified PoC code for CVE-1999-1476?
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-1999-1476 impacting intel pentium. Evaluated with CVSS Base Score of 2.1 (UNKNOWN).

Original NVD Description

Source: NIST NVD
A bug in Intel Pentium processor (MMX and Overdrive) allows local users to cause a denial of service (hang) in Intel-based operating systems such as Windows NT and Windows 95, via an invalid instruction, aka the "Invalid Operand with Locked CMPXCHG8B Instruction" problem.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Local (AV:L)
Requires local system execution permissions
Attack Complexity
Low (AC:L)
No specialized conditions required
Confidentiality
None (C:N)
No data confidentiality impact
Integrity
None (I:N)
No system modification impact

🎯 Affected Versions Matrix

Affected Product intel / pentium
Affected Versions *
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-1999-1476 impacting intel pentium.

⚡ Nuclei Detection Template (YAML) cve-1999-1476.yaml
id: cve-1999-1476

info:
  name: intel pentium - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: unknown
  description: |
    Automated signature & scanner for CVE-1999-1476 affecting intel pentium.
    Evaluation: A bug in Intel Pentium processor (MMX and Overdrive) allows local users to cause a denial of service (hang) in Intel-based operating systems such as W...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-1999-1476
  classification:
    cvss-metrics: CVSS:3.1/AV:L/AC:L/Au:N/C:N/I:N/A:P
    cvss-score: 2.1
    cve-id: CVE-1999-1476
    cwe-id: NVD-CWE-Other
  tags: cve,cve-1999-1476,intel,pentium,unknown

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "pentium"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-1999-1476.py
# Proof-of-Concept Exploit & Verification Probe for CVE-1999-1476
# Target: intel pentium | CVSS: 2.1 (UNKNOWN)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-1999-1476 (intel pentium)...")
    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 intel pentium 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-1999-1476.sh
# Recommended Remediation & Patching Commands for CVE-1999-1476
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install pentium 2>/dev/null || \
sudo dnf upgrade pentium 2>/dev/null || \
sudo yum update pentium

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

# 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-1999-1476 in intel pentium?

Review vendor-specific security notices and update intel pentium 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-1999-1476?

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-1999-1476?

CVE-1999-1476 is classified with a CVSS 3.1 Base Score of 2.1 (UNKNOWN). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
2.1
UNKNOWN SEVERITY
CVE ID CVE-1999-1476
Weakness NVD-CWE-Other
Vendor intel
Product pentium
Published 1999-12-31
Vector AV:L/AC:L/Au:N/C:N/I:N/A:P