HIGH CVSS 8.8
Published: 2017-09-07

CVE-2017-11567

cesanta mongoose_embedded_web_server_library Security Advisory (CVE-2017-11567)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2017-11567 impacting cesanta mongoose_embedded_web_server_library. Evaluated with CVSS Base Score of 8.8 (HIGH).

Original NVD Description

Source: NIST NVD
Cross-site request forgery (CSRF) vulnerability in Mongoose Web Server before 6.9 allows remote attackers to hijack the authentication of users for requests that modify Mongoose.conf via a request to __mg_admin?save. NOTE: this issue can be leveraged to execute arbitrary code remotely.

📊 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
Required (UI:R)
User must click or open resource
Scope
Unchanged (S:U)
Confined to same security context
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 cesanta / mongoose_embedded_web_server_library
Affected Versions *
Weakness Enumeration CWE-352

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-2017-11567 impacting cesanta mongoose_embedded_web_server_library.

⚡ Nuclei Detection Template (YAML) cve-2017-11567.yaml
id: cve-2017-11567

info:
  name: cesanta mongoose_embedded_web_server_library - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2017-11567 affecting cesanta mongoose_embedded_web_server_library.
    Evaluation: Cross-site request forgery (CSRF) vulnerability in Mongoose Web Server before 6.9 allows remote attackers to hijack the authentication of users for re...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2017-11567
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2017-11567
    cwe-id: CWE-352
  tags: cve,cve-2017-11567,cesanta,mongoose_embedded_web_ser,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "mongoose_embedded_web_server_library"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2017-11567.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2017-11567
# Target: cesanta mongoose_embedded_web_server_library | CVSS: 8.8 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2017-11567 (cesanta mongoose_embedded_web_server_library)...")
    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 cesanta mongoose_embedded_web_server_library 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-2017-11567.sh
# Recommended Remediation & Patching Commands for CVE-2017-11567
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install mongoose_embedded_web_ser 2>/dev/null || \
sudo dnf upgrade mongoose_embedded_web_ser 2>/dev/null || \
sudo yum update mongoose_embedded_web_ser

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

# 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-2017-11567 in cesanta mongoose_embedded_web_server_library?

Review vendor-specific security notices and update cesanta mongoose_embedded_web_server_library 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-2017-11567?

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-2017-11567?

CVE-2017-11567 is classified with a CVSS 3.1 Base Score of 8.8 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
8.8
HIGH SEVERITY
CVE ID CVE-2017-11567
Weakness CWE-352
Vendor cesanta
Product mongoose_embedded_web_server_library
Published 2017-09-07
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H