📄 Description (English)
SonicWall SMA100 Appliances OS Command Injection Vulnerability — SonicWall SMA100 appliances contain an OS command injection vulnerability in the management interface that allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user, which could potentially lead to code execution.
🤖 AI Executive Summary
CVE-2021-20035 is a critical OS command injection vulnerability in SonicWall SMA100 appliances affecting the management interface. Remote authenticated attackers can inject arbitrary commands as the 'nobody' user, potentially achieving code execution. With a CVSS score of 9.0 and publicly available exploits, this poses an immediate threat to organizations using SMA100 for remote access and VPN management.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 19, 2026 22:56
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability critically impacts Saudi organizations relying on SonicWall SMA100 for remote access infrastructure. Primary affected sectors include: Banking (SAMA-regulated institutions using SMA100 for secure remote access), Government agencies (NCA oversight), Telecommunications (STC, Mobily), Energy sector (ARAMCO and subsidiaries), and Healthcare institutions. Compromise could lead to unauthorized access to critical internal networks, data exfiltration, lateral movement, and potential disruption of essential services. The 'nobody' user context still permits significant system reconnaissance and privilege escalation opportunities.
🏢 Affected Saudi Sectors
Banking & Financial Services
Government & Public Administration
Telecommunications
Energy & Oil & Gas
Healthcare
Education
Large Enterprises with Remote Access Infrastructure
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all SonicWall SMA100 appliances in your environment and document firmware versions
2. Restrict management interface access to trusted IP addresses only via firewall rules
3. Implement network segmentation to isolate SMA100 management traffic
4. Enable enhanced logging and monitoring on SMA100 management interfaces
5. Review access logs for suspicious authentication patterns or command injection attempts
PATCHING GUIDANCE:
1. Apply SonicWall security patches immediately (firmware updates addressing CVE-2021-20035)
2. Prioritize patching for internet-facing SMA100 instances
3. Test patches in non-production environment before deployment
4. Schedule maintenance windows for patching with minimal business impact
COMPENSATING CONTROLS (if patching delayed):
1. Implement Web Application Firewall (WAF) rules to detect command injection patterns
2. Deploy intrusion detection/prevention systems (IDS/IPS) with signatures for this CVE
3. Enforce multi-factor authentication (MFA) for all SMA100 management access
4. Implement command execution monitoring and alerting
DETECTION RULES:
1. Monitor for HTTP POST requests to SMA100 management endpoints containing shell metacharacters (|, ;, &, $, `, etc.)
2. Alert on 'nobody' user process spawning unexpected child processes
3. Monitor system logs for command execution from web service processes
4. Track failed and successful authentication attempts to management interface
5. Implement YARA/Snort rules for known SMA100 exploitation patterns
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع أجهزة SonicWall SMA100 في بيئتك وقم بتوثيق إصدارات البرامج الثابتة
2. قيد الوصول إلى واجهة الإدارة على عناوين IP الموثوقة فقط عبر قواعد جدار الحماية
3. طبق تقسيم الشبكة لعزل حركة إدارة SMA100
4. فعّل التسجيل والمراقبة المحسّنة على واجهات إدارة SMA100
5. راجع سجلات الوصول للتحقق من أنماط المصادقة المريبة أو محاولات حقن الأوامر
إرشادات التصحيح:
1. طبق تحديثات أمان SonicWall فوراً (تحديثات البرامج الثابتة التي تعالج CVE-2021-20035)
2. أولويات التصحيح لمثيلات SMA100 المواجهة للإنترنت
3. اختبر التصحيحات في بيئة غير الإنتاج قبل النشر
4. جدول نوافذ الصيانة للتصحيح بأقل تأثير على العمل
الضوابط البديلة (إذا تأخر التصحيح):
1. طبق قواعد جدار تطبيقات الويب (WAF) للكشف عن أنماط حقن الأوامر
2. نشر أنظمة الكشف/الوقاية من الاختراق (IDS/IPS) مع توقيعات لهذا CVE
3. فرض المصادقة متعددة العوامل (MFA) لجميع وصول إدارة SMA100
4. طبق مراقبة تنفيذ الأوامر والتنبيهات
قواعد الكشف:
1. راقب طلبات HTTP POST إلى نقاط نهاية إدارة SMA100 التي تحتوي على أحرف shell (|, ;, &, $, `, إلخ)
2. تنبيه عند عملية مستخدم 'nobody' التي تولد عمليات فرعية غير متوقعة
3. راقب سجلات النظام لتنفيذ الأوامر من عمليات خدمة الويب
4. تتبع محاولات المصادقة الفاشلة والناجحة لواجهة الإدارة
5. طبق قواعد YARA/Snort لأنماط استغلال SMA100 المعروفة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies and Procedures
A.6.1.1 - Access Control Policy
A.6.2.1 - User Registration and De-registration
A.8.2.1 - Classification of Information
A.12.2.1 - Restrictions on Software Installation
A.12.4.1 - Event Logging
A.12.4.3 - Administrator and Operator Logs
A.13.1.1 - Network Security Perimeter
A.14.2.1 - Secure Development Policy
🔵 SAMA CSF
Governance & Risk Management - Risk Assessment and Management
Information & Cybersecurity - Access Control and Authentication
Information & Cybersecurity - Vulnerability Management
Information & Cybersecurity - Incident Management
Operational Resilience - System Monitoring and Logging
🟡 ISO 27001:2022
A.5.1 - Management Direction for Information Security
A.6.1 - Screening
A.6.2 - User Access Management
A.8.1 - Asset Inventory
A.8.2 - Information Classification
A.12.2 - Restrictions on Software Installation
A.12.4 - Logging
A.13.1 - Network Security
A.14.2 - Secure Development
🟣 PCI DSS v4.0
Requirement 1.1 - Firewall Configuration Standards
Requirement 2.1 - Default Passwords
Requirement 6.2 - Security Patches
Requirement 10.2 - User Access Logging
Requirement 10.3 - Logging of Access to Audit Trails
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
SonicWall:SMA100 Appliances