LOW CVSS 2.9
Published: 2022-12-16

CVE-2022-41972

contiki-ng contiki-ng Security Advisory (CVE-2022-41972)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2022-41972 impacting contiki-ng contiki-ng. Evaluated with CVSS Base Score of 2.9 (LOW).

Original NVD Description

Source: NIST NVD
Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. Versions prior to 4.9 contain a NULL Pointer Dereference in BLE L2CAP module. The Contiki-NG operating system for IoT devices contains a Bluetooth Low Energy stack. An attacker can inject a packet in this stack, which causes the implementation to dereference a NULL pointer and triggers undefined behavior. More specifically, while processing the L2CAP protocol, the implementation maps an incoming channel ID to its metadata structure. In this structure, state information regarding credits is managed through calls to the function input_l2cap_credit in the module os/net/mac/ble/ble-l2cap.c. Unfortunately, the input_l2cap_credit function does not check that the metadata corresponding to the user-supplied channel ID actually exists, which can lead to the channel variable being set to NULL before a pointer dereferencing operation is performed. The vulnerability has been patched in the "develop" branch of Contiki-NG, and will be included in release 4.9. Users can apply the patch in Contiki-NG pull request #2253 as a workaround until the new package is released.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Local (AV:L)
Requires local system execution permissions
Attack Complexity
High (AC:H)
Depends on race conditions or environment
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
Low (A:L)
Partial service performance degradation

🎯 Affected Versions Matrix

Affected Product contiki-ng / contiki-ng
Affected Versions *
Weakness Enumeration CWE-476

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-2022-41972 impacting contiki-ng contiki-ng.

⚡ Nuclei Detection Template (YAML) cve-2022-41972.yaml
id: cve-2022-41972

info:
  name: contiki-ng contiki-ng - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: low
  description: |
    Automated signature & scanner for CVE-2022-41972 affecting contiki-ng contiki-ng.
    Evaluation: Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. Versions prior to 4.9 contain a NULL Pointer Dereferenc...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2022-41972
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
    cvss-score: 2.9
    cve-id: CVE-2022-41972
    cwe-id: CWE-476
  tags: cve,cve-2022-41972,contiki-ng,contiki-ng,low

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "contiki-ng"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2022-41972.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2022-41972
# Target: contiki-ng contiki-ng | CVSS: 2.9 (LOW)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2022-41972 (contiki-ng contiki-ng)...")
    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 contiki-ng contiki-ng 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-2022-41972.sh
# Recommended Remediation & Patching Commands for CVE-2022-41972
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install contiki-ng 2>/dev/null || \
sudo dnf upgrade contiki-ng 2>/dev/null || \
sudo yum update contiki-ng

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

# 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-2022-41972 in contiki-ng contiki-ng?

Review vendor-specific security notices and update contiki-ng contiki-ng 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-2022-41972?

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-2022-41972?

CVE-2022-41972 is classified with a CVSS 3.1 Base Score of 2.9 (LOW). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
2.9
LOW SEVERITY
CVE ID CVE-2022-41972
Weakness CWE-476
Vendor contiki-ng
Product contiki-ng
Published 2022-12-16
Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L