UNKNOWN CVSS 10.0
Published: 2008-06-24

CVE-2008-2662

ruby-lang ruby Security Advisory (CVE-2008-2662)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2008-2662 impacting ruby-lang ruby. Evaluated with CVSS Base Score of 10.0 (UNKNOWN).

Original NVD Description

Source: NIST NVD
Multiple integer overflows in the rb_str_buf_append function in Ruby 1.8.4 and earlier, 1.8.5 before 1.8.5-p231, 1.8.6 before 1.8.6-p230, 1.8.7 before 1.8.7-p22, and 1.9.0 before 1.9.0-2 allow context-dependent attackers to execute arbitrary code or cause a denial of service via unknown vectors that trigger memory corruption, a different issue than CVE-2008-2663, CVE-2008-2664, and CVE-2008-2725. NOTE: as of 20080624, there has been inconsistent usage of multiple CVE identifiers related to Ruby. This CVE description should be regarded as authoritative, although it is likely to change.

📊 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 ruby-lang / ruby
Affected Versions *
Weakness Enumeration CWE-189

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-2008-2662 impacting ruby-lang ruby.

⚡ Nuclei Detection Template (YAML) cve-2008-2662.yaml
id: cve-2008-2662

info:
  name: ruby-lang ruby - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: unknown
  description: |
    Automated signature & scanner for CVE-2008-2662 affecting ruby-lang ruby.
    Evaluation: Multiple integer overflows in the rb_str_buf_append function in Ruby 1.8.4 and earlier, 1.8.5 before 1.8.5-p231, 1.8.6 before 1.8.6-p230, 1.8.7 before...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2008-2662
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/Au:N/C:C/I:C/A:C
    cvss-score: 10.0
    cve-id: CVE-2008-2662
    cwe-id: CWE-189
  tags: cve,cve-2008-2662,ruby-lang,ruby,unknown

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "ruby"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2008-2662.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2008-2662
# Target: ruby-lang ruby | CVSS: 10.0 (UNKNOWN)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2008-2662 (ruby-lang ruby)...")
    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 ruby-lang ruby 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-2008-2662.sh
# Recommended Remediation & Patching Commands for CVE-2008-2662
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install ruby 2>/dev/null || \
sudo dnf upgrade ruby 2>/dev/null || \
sudo yum update ruby

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

# 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-2008-2662 in ruby-lang ruby?

Review vendor-specific security notices and update ruby-lang ruby 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-2008-2662?

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-2008-2662?

CVE-2008-2662 is classified with a CVSS 3.1 Base Score of 10.0 (UNKNOWN). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
10.0
UNKNOWN SEVERITY
CVE ID CVE-2008-2662
Weakness CWE-189
Vendor ruby-lang
Product ruby
Published 2008-06-24
Vector AV:N/AC:L/Au:N/C:C/I:C/A:C