HIGH CVSS 7.5
Published: 2025-04-06

CVE-2025-2259

eclipse threadx_netx_duo Security Advisory (CVE-2025-2259)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2025-2259 impacting eclipse threadx_netx_duo. Evaluated with CVSS Base Score of 7.5 (HIGH).

Original NVD Description

Source: NIST NVD
In NetX HTTP server functionality of Eclipse ThreadX NetX Duo before version 6.4.3, an attacker can cause an integer underflow and a subsequent denial of service by writing a very large file, by specially crafted packets with Content-Length in one packet smaller than the data request size of the other packet. A possible workaround is to disable HTTP PUT support. This issue follows an incomplete fix of CVE-2025-0727

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
None (PR:N)
Unauthenticated execution
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
None (C:N)
No data confidentiality impact
Integrity
None (I:N)
No system modification impact
Availability
High (A:H)
Total denial of service or shutdown

🎯 Affected Versions Matrix

Affected Product eclipse / threadx_netx_duo
Affected Versions *
Weakness Enumeration CWE-191

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-2025-2259 impacting eclipse threadx_netx_duo.

⚡ Nuclei Detection Template (YAML) cve-2025-2259.yaml
id: cve-2025-2259

info:
  name: eclipse threadx_netx_duo - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2025-2259 affecting eclipse threadx_netx_duo.
    Evaluation: In NetX HTTP server functionality of Eclipse ThreadX NetX Duo before 
version 6.4.3, an attacker can cause an integer underflow and a 
subsequent deni...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2025-2259
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    cvss-score: 7.5
    cve-id: CVE-2025-2259
    cwe-id: CWE-191
  tags: cve,cve-2025-2259,eclipse,threadx_netx_duo,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "threadx_netx_duo"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2025-2259.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2025-2259
# Target: eclipse threadx_netx_duo | CVSS: 7.5 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2025-2259 (eclipse threadx_netx_duo)...")
    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 eclipse threadx_netx_duo 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-2025-2259.sh
# Recommended Remediation & Patching Commands for CVE-2025-2259
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install threadx_netx_duo 2>/dev/null || \
sudo dnf upgrade threadx_netx_duo 2>/dev/null || \
sudo yum update threadx_netx_duo

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

# 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-2025-2259 in eclipse threadx_netx_duo?

Review vendor-specific security notices and update eclipse threadx_netx_duo 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-2025-2259?

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-2025-2259?

CVE-2025-2259 is classified with a CVSS 3.1 Base Score of 7.5 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
7.5
HIGH SEVERITY
CVE ID CVE-2025-2259
Weakness CWE-191
Vendor eclipse
Product threadx_netx_duo
Published 2025-04-06
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H