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Vulnerabilities

CVE-2022-3236

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Sophos Firewall Code Injection Vulnerability — A code injection vulnerability in the User Portal and Webadmin of Sophos Firewall allows for remote code execution.
Published: Sep 23, 2022  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Sophos Firewall Code Injection Vulnerability — A code injection vulnerability in the User Portal and Webadmin of Sophos Firewall allows for remote code execution.

🤖 AI Executive Summary

CVE-2022-3236 is a critical code injection vulnerability in Sophos Firewall's User Portal and Webadmin interfaces that enables unauthenticated remote code execution with a CVSS score of 9.0. This vulnerability poses an immediate threat to Saudi organizations relying on Sophos Firewall for network perimeter defense, as active exploits are publicly available. Immediate patching is essential to prevent unauthorized access to critical network infrastructure and sensitive data.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 21, 2026 23:51
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability directly impacts Saudi critical infrastructure sectors: Banking (SAMA-regulated institutions relying on Sophos for network security), Government agencies (NCA, Ministry of Interior, Ministry of Defense), Energy sector (ARAMCO and downstream operators), Telecommunications (STC, Mobily, Zain), and Healthcare institutions. Sophos Firewall is widely deployed in Saudi Arabia as a primary perimeter defense solution. Successful exploitation could lead to complete network compromise, data exfiltration, lateral movement to internal systems, and disruption of critical services. The lack of authentication requirement makes this particularly dangerous for organizations with internet-facing Sophos instances.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Energy and Utilities Telecommunications Healthcare Critical Infrastructure Defense and Security
⚖️ Saudi Risk Score (AI)
9.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Sophos Firewall instances in your environment and verify their version against the affected versions list
2. Restrict network access to Sophos Firewall User Portal and Webadmin interfaces to authorized IP addresses only using firewall rules
3. Implement Web Application Firewall (WAF) rules to block suspicious code injection patterns targeting these interfaces
4. Enable detailed logging and monitoring on all Sophos Firewall management interfaces

PATCHING GUIDANCE:
1. Apply the latest Sophos Firewall security patch immediately (v19.5.x, v20.0.x, or later depending on your version)
2. Test patches in a non-production environment first
3. Schedule patching during maintenance windows with minimal business impact
4. Verify patch application by checking firmware version post-update

COMPENSATING CONTROLS (if patching delayed):
1. Implement network segmentation to restrict access to Sophos management interfaces
2. Deploy intrusion detection/prevention systems (IDS/IPS) with signatures for CVE-2022-3236 exploitation attempts
3. Monitor for suspicious HTTP POST requests with encoded payloads to /webadmin or /userportal endpoints
4. Implement multi-factor authentication for all administrative access
5. Conduct forensic analysis of firewall logs for indicators of compromise

DETECTION RULES:
1. Monitor for HTTP requests containing shell metacharacters (|, &, ;, `, $, etc.) in POST parameters to Sophos management interfaces
2. Alert on successful code execution indicators in Sophos logs (unexpected process spawning, file modifications)
3. Track failed authentication attempts followed by successful access from same source IP
4. Monitor outbound connections from Sophos Firewall to unexpected destinations post-exploitation
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع مثيلات جدار حماية Sophos في بيئتك وتحقق من إصداراتها مقابل قائمة الإصدارات المتأثرة
2. قيد الوصول إلى شبكة بوابة مستخدم Sophos وواجهات الإدارة على عناوين IP المصرح بها فقط باستخدام قواعد جدار الحماية
3. طبق قواعد جدار تطبيقات الويب (WAF) لحجب أنماط حقن الأكواد المريبة التي تستهدف هذه الواجهات
4. فعّل التسجيل والمراقبة التفصيلية على جميع واجهات إدارة Sophos

إرشادات التصحيح:
1. طبق أحدث تصحيح أمان لجدار حماية Sophos فوراً (v19.5.x أو v20.0.x أو إصدار أحدث حسب إصدارك)
2. اختبر التصحيحات في بيئة غير إنتاجية أولاً
3. جدول التصحيح خلال نوافذ الصيانة بأقل تأثير على العمل
4. تحقق من تطبيق التصحيح بفحص إصدار البرنامج الثابت بعد التحديث

الضوابط البديلة (إذا تأخر التصحيح):
1. طبق تقسيم الشبكة لتقييد الوصول إلى واجهات إدارة Sophos
2. نشر أنظمة كشف/منع الاختراق (IDS/IPS) مع توقيعات لمحاولات استغلال CVE-2022-3236
3. راقب طلبات HTTP المريبة التي تحتوي على حمولات مشفرة إلى نقاط نهاية /webadmin أو /userportal
4. طبق المصادقة متعددة العوامل لجميع الوصول الإداري
5. أجرِ تحليل الطب الشرعي لسجلات جدار الحماية للبحث عن مؤشرات الاختراق

قواعد الكشف:
1. راقب طلبات HTTP التي تحتوي على أحرف metacharacters (|, &, ;, `, $، إلخ) في معاملات POST إلى واجهات إدارة Sophos
2. أصدر تنبيهات عند مؤشرات تنفيذ الأكواد الناجحة في سجلات Sophos (توليد عمليات غير متوقعة، تعديلات الملفات)
3. تتبع محاولات المصادقة الفاشلة متبوعة بالوصول الناجح من عنوان IP نفسه
4. راقب الاتصالات الصادرة من جدار حماية Sophos إلى وجهات غير متوقعة بعد الاستغلال
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 Control 5.1 - Access Control and Authentication ECC 2024 Control 5.2 - Privileged Access Management ECC 2024 Control 6.1 - Vulnerability Management ECC 2024 Control 6.2 - Patch Management ECC 2024 Control 7.1 - Intrusion Detection and Prevention ECC 2024 Control 8.1 - Incident Response and Management
🔵 SAMA CSF
SAMA CSF Governance - Risk Management Framework SAMA CSF Protect - Access Control SAMA CSF Protect - System Hardening SAMA CSF Detect - Monitoring and Alerting SAMA CSF Respond - Incident Response Procedures
🟡 ISO 27001:2022
ISO 27001:2022 A.5.2 - User Access Management ISO 27001:2022 A.5.3 - Access Rights ISO 27001:2022 A.8.1 - User Endpoint Devices ISO 27001:2022 A.8.2 - Privileged Access Rights ISO 27001:2022 A.12.6 - Change Management ISO 27001:2022 A.14.2 - System Development and Acceptance
🟣 PCI DSS v4.0
PCI DSS 6.2 - Security Patches and Updates PCI DSS 7.1 - Limit Access to System Components PCI DSS 11.3 - Penetration Testing
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Sophos:Firewall
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS92.40%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2022-10-14
Published 2022-09-23
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
9.5
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
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