UNKNOWN CVSS 7.5
Published: 2005-12-09

CVE-2005-4126

realnetworks realplayer Security Advisory (CVE-2005-4126)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2005-4126 impacting realnetworks realplayer. Evaluated with CVSS Base Score of 7.5 (UNKNOWN).

Original NVD Description

Source: NIST NVD
** UNVERIFIABLE, PRERELEASE ** NOTE: this issue describes a problem that can not be independently verified as of 20051208. Unspecified vulnerability in unspecified versions of Real Networks RealPlayer allows attackers to execute arbitrary code. NOTE: the information regarding this issue is extremely vague and does not provide any verifiable information. It has been posted by a reliable reporter with a prerelease disclosure policy. This item has only been assigned a CVE identifier for tracking purposes, and to serve as a concrete example for discussion of the newly emerging UNVERIFIABLE and PRERELEASE content decisions in CVE, which must be discussed by the Editorial Board. Without additional details or independent verification by reliable sources, it is possible that this item might be RECAST or REJECTED.

📊 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 realnetworks / realplayer
Affected Versions 6.0
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-2005-4126 impacting realnetworks realplayer.

⚡ Nuclei Detection Template (YAML) cve-2005-4126.yaml
id: cve-2005-4126

info:
  name: realnetworks realplayer - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: unknown
  description: |
    Automated signature & scanner for CVE-2005-4126 affecting realnetworks realplayer.
    Evaluation: ** UNVERIFIABLE, PRERELEASE **  NOTE: this issue describes a problem that can not be independently verified as of 20051208.  Unspecified vulnerability...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2005-4126
  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-2005-4126
    cwe-id: NVD-CWE-Other
  tags: cve,cve-2005-4126,realnetworks,realplayer,unknown

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "realplayer"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2005-4126.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2005-4126
# Target: realnetworks realplayer | 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-2005-4126 (realnetworks realplayer)...")
    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 realnetworks realplayer scope (6.0).")
        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-2005-4126.sh
# Recommended Remediation & Patching Commands for CVE-2005-4126
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install realplayer 2>/dev/null || \
sudo dnf upgrade realplayer 2>/dev/null || \
sudo yum update realplayer

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

# 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

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2005-4126 in realnetworks realplayer?

Review vendor-specific security notices and update realnetworks realplayer 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-2005-4126?

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-2005-4126?

CVE-2005-4126 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-2005-4126
Weakness NVD-CWE-Other
Vendor realnetworks
Product realplayer
Published 2005-12-09
Vector AV:N/AC:L/Au:N/C:P/I:P/A:P