📄 Description (English)
NBMonitor 1.6.8 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the registration code input field. Attackers can paste a 256-character buffer into the registration key field to trigger an application crash and potential system instability.
🤖 AI Executive Summary
CVE-2021-47814 is a buffer overflow vulnerability in NBMonitor 1.6.8 that allows attackers to crash the application by inputting oversized registration codes, potentially causing system instability. With a CVSS score of 7.5 and publicly available exploits, this poses a significant denial of service risk to organizations using this monitoring software. Immediate patching is critical to prevent service disruptions in production environments.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 1, 2026 13:57
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi organizations using NBMonitor for system and network monitoring, including government IT departments, financial institutions, and enterprise IT operations. Government agencies under NCA oversight and banking sector organizations relying on NBMonitor for infrastructure monitoring face service disruption risks. Telecom operators (STC, Mobily) and energy sector entities using this monitoring tool could experience operational disruptions. The denial of service impact could cascade to dependent systems and compromise monitoring capabilities during critical operations.
🏢 Affected Saudi Sectors
Government and Public Administration
Banking and Financial Services
Telecommunications
Energy and Utilities
Healthcare
Enterprise IT Operations
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
1. IMMEDIATE ACTIONS:
- Identify all systems running NBMonitor 1.6.8 across your organization
- Restrict access to the registration code input field to authorized personnel only
- Implement input validation to reject registration codes exceeding 255 characters
- Monitor for suspicious registration attempts in application logs
2. PATCHING:
- Upgrade NBMonitor to version 1.6.9 or later immediately
- Test patches in non-production environments first
- Schedule patching during maintenance windows to minimize service impact
- Verify patch installation and application restart
3. COMPENSATING CONTROLS:
- Deploy Web Application Firewall (WAF) rules to block oversized input payloads to the registration field
- Implement rate limiting on registration attempts
- Enable application-level logging and alerting for buffer overflow attempts
- Use network segmentation to limit access to NBMonitor interfaces
4. DETECTION RULES:
- Monitor for registration code inputs exceeding 256 characters in application logs
- Alert on unexpected application crashes or restarts
- Track failed registration attempts with abnormally large payloads
- Monitor system resource spikes (CPU, memory) coinciding with registration attempts
🔧 خطوات المعالجة (العربية)
1. الإجراءات الفورية:
- تحديد جميع الأنظمة التي تعمل بـ NBMonitor 1.6.8 في المنظمة
- تقييد الوصول إلى حقل إدخال رمز التسجيل للموظفين المصرح لهم فقط
- تطبيق التحقق من صحة الإدخال لرفض رموز التسجيل التي تتجاوز 255 حرفاً
- مراقبة محاولات التسجيل المريبة في سجلات التطبيق
2. التصحيح:
- ترقية NBMonitor إلى الإصدار 1.6.9 أو أحدث فوراً
- اختبار التصحيحات في بيئات غير الإنتاج أولاً
- جدولة التصحيح خلال نوافذ الصيانة لتقليل تأثير الخدمة
- التحقق من تثبيت التصحيح وإعادة تشغيل التطبيق
3. الضوابط البديلة:
- نشر قواعد جدار حماية تطبيقات الويب (WAF) لحجب حمولات الإدخال الكبيرة
- تطبيق تحديد معدل محاولات التسجيل
- تفعيل تسجيل التطبيق والتنبيهات لمحاولات تجاوز المخزن المؤقت
- استخدام تقسيم الشبكة لتقييد الوصول إلى واجهات NBMonitor
4. قواعد الكشف:
- مراقبة رموز التسجيل التي تتجاوز 256 حرفاً في سجلات التطبيق
- التنبيه على أعطال التطبيق أو إعادة التشغيل غير المتوقعة
- تتبع محاولات التسجيل الفاشلة مع حمولات كبيرة بشكل غير طبيعي
- مراقبة ارتفاع موارد النظام (CPU، الذاكرة) المتزامنة مع محاولات التسجيل
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development policy
A.12.2.1 - Monitoring of information systems
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification
PR.IP-12 - Software development and change management
DE.CM-1 - Detection and monitoring of anomalies
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development policy
A.12.2.1 - Monitoring of information systems
📦 Affected Products / CPE 1 entries
nsasoft:nbmonitor:1.6.8