CRITICAL CVSS 10.0
Published: 2024-02-21

CVE-2024-1709

connectwise screenconnect Security Advisory (CVE-2024-1709)
↗ Official NIST NVD Record
Technical Writeup & Proof-of-Concept Exploit Dossier
🔬 Deep Technical Breakdown ⚡ Verified PoC Available

ConnectWise ScreenConnect Authentication Bypass: SetupWizard Path Traversal (Deep Analysis)

Author: John Hammond & Caleb Stewart • Source: Huntress Threat Research

CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2024-1709 impacting connectwise screenconnect. Evaluated with CVSS Base Score of 10.0 (CRITICAL).

Original NVD Description

Source: NIST NVD
ConnectWise ScreenConnect 23.9.7 and prior are affected by an Authentication Bypass Using an Alternate Path or Channel vulnerability, which may allow an attacker direct access to confidential information or critical systems.

📊 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
Changed (S:C)
Impacts components beyond caller authority
Confidentiality
High (C:H)
Total information disclosure
Integrity
High (I:H)
Total modification of target system
Availability
High (A:H)
Total denial of service or shutdown

🎯 Affected Versions Matrix

Affected Product connectwise / screenconnect
Affected Versions *
Weakness Enumeration CWE-288

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-2024-1709 impacting connectwise screenconnect.

⚡ Nuclei Detection Template (YAML) cve-2024-1709.yaml
id: cve-2024-1709

info:
  name: connectwise screenconnect - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: critical
  description: |
    Automated signature & scanner for CVE-2024-1709 affecting connectwise screenconnect.
    Evaluation: ConnectWise ScreenConnect 23.9.7 and prior are affected by an Authentication Bypass Using an Alternate Path or Channel

 vulnerability, which may allo...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2024-1709
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10.0
    cve-id: CVE-2024-1709
    cwe-id: CWE-288
  tags: cve,cve-2024-1709,connectwise,screenconnect,critical

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "screenconnect"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2024-1709.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2024-1709
# Target: connectwise screenconnect | CVSS: 10.0 (CRITICAL)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2024-1709 (connectwise screenconnect)...")
    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 connectwise screenconnect 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-2024-1709.sh
# Recommended Remediation & Patching Commands for CVE-2024-1709
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install screenconnect 2>/dev/null || \
sudo dnf upgrade screenconnect 2>/dev/null || \
sudo yum update screenconnect

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

# 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-2024-1709 in connectwise screenconnect?

Review vendor-specific security notices and update connectwise screenconnect 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-2024-1709?

A verified technical Proof of Concept (PoC) writeup is tracked in this dossier above.

What is the CVSS 3.1 severity rating and impact for CVE-2024-1709?

CVE-2024-1709 is classified with a CVSS 3.1 Base Score of 10.0 (CRITICAL). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
10.0
CRITICAL SEVERITY
CVE ID CVE-2024-1709
Weakness CWE-288
Vendor connectwise
Product screenconnect
Published 2024-02-21
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H