📄 Description (English)
Endian Firewall version 3.3.25 and prior allow authenticated users to execute arbitrary OS commands via the DATE parameter to /cgi-bin/logs_clamav.cgi. The DATE parameter value is used to construct a file path that is passed to a Perl open() call, which allows command injection due to an incomplete regular expression validation.
🤖 AI Executive Summary
Endian Firewall versions 3.3.25 and prior contain a command injection vulnerability in the logs_clamav.cgi module that allows authenticated users to execute arbitrary OS commands via the DATE parameter. The vulnerability exploits incomplete regex validation in Perl's open() function, enabling attackers with valid credentials to achieve remote code execution with firewall privileges. This poses a critical risk to Saudi organizations using Endian Firewall as perimeter security, particularly given the lack of available patches.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 07:35
🇸🇦 Saudi Arabia Impact Assessment
High impact for Saudi government agencies, critical infrastructure operators (ARAMCO, SEC), and financial institutions using Endian Firewall as perimeter defense. Compromised firewalls could allow lateral movement into internal networks, bypass security controls, and enable data exfiltration. Telecommunications sector (STC, Mobily) and healthcare organizations relying on Endian Firewall for network segmentation face significant risk. The authenticated requirement reduces immediate external threat but insider threats and compromised admin accounts pose substantial risk. NCA-regulated entities and SAMA-supervised banks are particularly vulnerable if Endian Firewall is part of their security architecture.
🏢 Affected Saudi Sectors
Government & Public Administration
Banking & Financial Services
Energy & Utilities (ARAMCO, SEC)
Telecommunications (STC, Mobily, Zain)
Healthcare & Hospitals
Critical Infrastructure
Defense & Security
Education & Universities
🎯 MITRE ATT&CK Techniques
T1190 - Exploit Public-Facing Application
T1059 - Command and Scripting Interpreter
T1059.006 - Python
T1078 - Valid Accounts
T1078.001 - Default Accounts
T1548 - Abuse Elevation Control Mechanism
T1548.004 - Elevated Execution with Prompt
T1133 - External Remote Services
T1021 - Remote Services
T1021.001 - Remote Services: RDP
T1040 - Traffic Capture or Replay
T1041 - Exfiltration Over C2 Channel
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Endian Firewall instances in your environment (versions 3.3.25 and prior) using network discovery tools
2. Restrict administrative access to firewall management interfaces - implement principle of least privilege for admin accounts
3. Monitor firewall logs for suspicious DATE parameter values containing shell metacharacters (|, ;, &, $, `, etc.)
4. Disable or restrict access to /cgi-bin/logs_clamav.cgi if not actively used
COMPENSATING CONTROLS (until patch available):
5. Implement Web Application Firewall (WAF) rules to block requests to logs_clamav.cgi containing command injection patterns
6. Apply input validation at network level - block DATE parameters with special characters
7. Segment firewall management access to dedicated administrative networks
8. Enable comprehensive audit logging for all CGI script access
9. Implement multi-factor authentication for firewall administrative accounts
10. Consider deploying alternative firewall solutions or air-gapping critical Endian instances
DETECTION RULES:
- Alert on POST/GET requests to /cgi-bin/logs_clamav.cgi with DATE parameter containing: pipe (|), semicolon (;), ampersand (&), backtick (`), dollar sign ($), or command substitution patterns
- Monitor firewall process execution logs for unexpected child processes spawned from Perl interpreter
- Track failed authentication attempts followed by successful CGI access
- Log all modifications to firewall rules or configurations
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع مثيلات Endian Firewall في بيئتك (الإصدارات 3.3.25 وما قبلها) باستخدام أدوات اكتشاف الشبكة
2. تقييد الوصول الإداري إلى واجهات إدارة جدار الحماية - تطبيق مبدأ الامتياز الأقل للحسابات الإدارية
3. مراقبة سجلات جدار الحماية للقيم المريبة لمعامل DATE التي تحتوي على أحرف shell (|، ;، &، $، `، إلخ)
4. تعطيل أو تقييد الوصول إلى /cgi-bin/logs_clamav.cgi إذا لم يكن قيد الاستخدام النشط
الضوابط التعويضية (حتى توفر التصحيح):
5. تطبيق قواعد جدار تطبيقات الويب (WAF) لحظر الطلبات إلى logs_clamav.cgi التي تحتوي على أنماط حقن الأوامر
6. تطبيق التحقق من الإدخال على مستوى الشبكة - حظر معاملات DATE بأحرف خاصة
7. تقسيم الوصول إلى إدارة جدار الحماية إلى شبكات إدارية مخصصة
8. تفعيل تسجيل التدقيق الشامل لجميع عمليات الوصول إلى البرامج النصية CGI
9. تطبيق المصادقة متعددة العوامل لحسابات جدار الحماية الإدارية
10. النظر في نشر حلول جدار حماية بديلة أو عزل مثيلات Endian الحرجة
قواعد الكشف:
- تنبيه على طلبات POST/GET إلى /cgi-bin/logs_clamav.cgi مع معامل DATE يحتوي على: أنبوب (|)، فاصلة منقوطة (;)، علامة العطف (&)، علامة خلفية (`)، علامة دولار ($)، أو أنماط استبدال الأوامر
- مراقبة سجلات تنفيذ عمليات جدار الحماية للعمليات الفرعية غير المتوقعة التي تم إطلاقها من مترجم Perl
- تتبع محاولات المصادقة الفاشلة متبوعة بالوصول الناجح إلى CGI
- تسجيل جميع التعديلات على قواعد جدار الحماية أو التكوينات
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies (access control to firewall management)
A.6.1.2 - User Registration and De-registration (admin account management)
A.7.1.1 - User Access Management (principle of least privilege)
A.8.2.1 - User Responsibility (secure credential handling)
A.9.1.1 - Access Control Policy (firewall administrative access)
A.9.2.1 - User Registration and De-registration
A.10.1.1 - Cryptography Policy (secure admin communications)
A.12.4.1 - Event Logging (CGI access and command execution logs)
A.12.4.3 - Protection of Log Information (secure log storage)
🔵 SAMA CSF
ID.AM-2 - Asset Management (inventory Endian Firewall instances)
PR.AC-1 - Access Control Policy (restrict firewall admin access)
PR.AC-4 - Access Management (MFA for admin accounts)
PR.PT-1 - Security Architecture (network segmentation)
DE.AE-1 - Anomalies and Events (monitor CGI access patterns)
DE.CM-1 - Detection Processes (WAF rules for command injection)
RS.AN-1 - Analysis (incident response for compromised firewalls)
🟡 ISO 27001:2022
A.5.1.1 - Information security policies
A.6.1.2 - Allocation of information security responsibilities
A.8.1.1 - Screening (admin account vetting)
A.8.2.1 - Terms and conditions of employment
A.8.3.1 - Information security awareness and training
A.9.1.1 - Access control policy
A.9.2.1 - User registration and de-registration
A.9.2.5 - Access rights review
A.9.4.3 - Password management
A.12.4.1 - Event logging
A.12.4.3 - Protection of log information
A.14.2.1 - Secure development policy
🟣 PCI DSS v4.0.1
Requirement 2.1 - Change default passwords
Requirement 6.2 - Security patches and updates
Requirement 7 - Restrict access to cardholder data
Requirement 8.1 - Unique user IDs
Requirement 8.2 - Strong authentication
Requirement 10.2 - Implement automated audit trails
📦 Affected Products / CPE 1 entries
endian:firewall_community