UNKNOWN CVSS 5.0
Published: 2009-06-16

CVE-2009-1761

ca arcserve_backup Security Advisory (CVE-2009-1761)
↗ Official NIST NVD Record
Seeking technical exploit breakdowns or verified PoC code for CVE-2009-1761?
🔬 Search Writeups & Exploit Archive →

CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2009-1761 impacting ca arcserve_backup. Evaluated with CVSS Base Score of 5.0 (UNKNOWN).

Original NVD Description

Source: NIST NVD
The message engine in CA ARCserve Backup r12.0 and r12.0 SP1 for Windows allows remote attackers to cause a denial of service (crash) via (1) an invalid 0x13 message, which is not properly handled in the ASCORE module, or (2) a 0x3B message with invalid stub data that triggers an RPC marshalling error.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
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 ca / arcserve_backup
Affected Versions r12.0
Weakness Enumeration CWE-20

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-2009-1761 impacting ca arcserve_backup.

⚡ Nuclei Detection Template (YAML) cve-2009-1761.yaml
id: cve-2009-1761

info:
  name: ca arcserve_backup - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: unknown
  description: |
    Automated signature & scanner for CVE-2009-1761 affecting ca arcserve_backup.
    Evaluation: The message engine in CA ARCserve Backup r12.0 and r12.0 SP1 for Windows allows remote attackers to cause a denial of service (crash) via (1) an inval...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2009-1761
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/Au:N/C:N/I:N/A:P
    cvss-score: 5.0
    cve-id: CVE-2009-1761
    cwe-id: CWE-20
  tags: cve,cve-2009-1761,ca,arcserve_backup,unknown

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "arcserve_backup"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2009-1761.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2009-1761
# Target: ca arcserve_backup | CVSS: 5.0 (UNKNOWN)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2009-1761 (ca arcserve_backup)...")
    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 ca arcserve_backup scope (r12.0).")
        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-2009-1761.sh
# Recommended Remediation & Patching Commands for CVE-2009-1761
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install arcserve_backup 2>/dev/null || \
sudo dnf upgrade arcserve_backup 2>/dev/null || \
sudo yum update arcserve_backup

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

# 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-2009-1761 in ca arcserve_backup?

Review vendor-specific security notices and update ca arcserve_backup 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-2009-1761?

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-2009-1761?

CVE-2009-1761 is classified with a CVSS 3.1 Base Score of 5.0 (UNKNOWN). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
5.0
UNKNOWN SEVERITY
CVE ID CVE-2009-1761
Weakness CWE-20
Vendor ca
Product arcserve_backup
Published 2009-06-16
Vector AV:N/AC:L/Au:N/C:N/I:N/A:P