📄 Description (English)
Endian Firewall version 3.3.25 and prior allow stored cross-site scripting (XSS) via the ADDRESS BCC parameter to /cgi-bin/smtprouting.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page.
🤖 AI Executive Summary
Endian Firewall versions 3.3.25 and earlier contain a stored XSS vulnerability in the SMTP routing configuration interface that allows authenticated attackers to inject malicious JavaScript through the ADDRESS BCC parameter. The vulnerability affects administrative interfaces where multiple users may access the same configuration pages, enabling session hijacking and credential theft. While currently unpatched, the requirement for authentication limits immediate external exploitation risk.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 16, 2026 15:16
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using Endian Firewall for email security and network perimeter defense face insider threat risks, particularly in banking (SAMA-regulated institutions), government agencies (NCA oversight), and large enterprises managing sensitive communications. The vulnerability is especially critical for organizations with multiple administrators accessing SMTP routing configurations. Compromised administrative sessions could lead to email interception, unauthorized message routing, and lateral movement within corporate networks. Telecom operators (STC, Mobily) and healthcare providers using Endian solutions for email filtering are at elevated risk.
🏢 Affected Saudi Sectors
Banking and Financial Services (SAMA-regulated)
Government and Public Administration (NCA oversight)
Healthcare and Medical Institutions
Energy and Utilities (ARAMCO, regional operators)
Telecommunications (STC, Mobily, Zain)
Large Enterprises with Multi-User Administrative Access
Email Service Providers
🎯 MITRE ATT&CK Techniques
T1190 - Exploit Public-Facing Application (if management interface exposed)
T1598 - Phishing (credential harvesting via XSS)
T1056 - Input Capture (session hijacking via stored XSS)
T1539 - Steal Web Session Cookie (XSS-based cookie theft)
T1021 - Remote Services (lateral movement after admin compromise)
T1566 - Phishing (email interception via compromised SMTP routing)
T1021.001 - Remote Services: Remote Desktop Protocol (if admin access escalated)
⚖️ Saudi Risk Score (AI)
6.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Restrict access to /cgi-bin/smtprouting.cgi to trusted administrative networks only using firewall rules
2. Implement IP whitelisting for administrative access to Endian Firewall management interfaces
3. Enforce strong authentication (MFA if supported) for all administrative accounts
4. Review SMTP routing configuration logs for suspicious modifications
5. Audit all users with access to SMTP routing settings
COMPENSATING CONTROLS:
6. Deploy Web Application Firewall (WAF) rules to detect and block XSS payloads in ADDRESS BCC parameter
7. Implement Content Security Policy (CSP) headers if Endian supports custom headers
8. Monitor for JavaScript execution in administrative sessions using endpoint detection tools
9. Disable unnecessary administrative accounts and enforce principle of least privilege
10. Implement session timeout policies (15-30 minutes for administrative sessions)
DETECTION RULES:
- Monitor POST requests to /cgi-bin/smtprouting.cgi containing script tags, event handlers (onclick, onerror), or encoded JavaScript
- Alert on ADDRESS BCC parameter values exceeding normal length (>255 characters)
- Track administrative session anomalies and concurrent logins from different IPs
- Log all modifications to SMTP routing configurations with administrator identity
PATCHING:
- Contact Endian support for security updates; upgrade to version >3.3.25 when available
- Maintain offline backups of SMTP routing configurations before applying patches
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تقييد الوصول إلى /cgi-bin/smtprouting.cgi على الشبكات الإدارية الموثوقة فقط باستخدام قواعد جدار الحماية
2. تطبيق قائمة بيضاء للعناوين IP للوصول الإداري إلى واجهات إدارة Endian Firewall
3. فرض المصادقة القوية (MFA إن أمكن) لجميع الحسابات الإدارية
4. مراجعة سجلات تكوين توجيه SMTP للتعديلات المريبة
5. تدقيق جميع المستخدمين الذين لديهم وصول إلى إعدادات توجيه SMTP
الضوابط البديلة:
6. نشر قواعد جدار تطبيقات الويب (WAF) للكشف عن حمولات XSS وحجبها في معامل ADDRESS BCC
7. تطبيق رؤوس سياسة أمان المحتوى (CSP) إذا كان Endian يدعم رؤوس مخصصة
8. مراقبة تنفيذ JavaScript في الجلسات الإدارية باستخدام أدوات الكشف عن نقاط النهاية
9. تعطيل الحسابات الإدارية غير الضرورية وفرض مبدأ الامتياز الأدنى
10. تطبيق سياسات انتهاء الجلسة (15-30 دقيقة للجلسات الإدارية)
قواعد الكشف:
- مراقبة طلبات POST إلى /cgi-bin/smtprouting.cgi التي تحتوي على علامات البرامج النصية أو معالجات الأحداث أو JavaScript المشفر
- تنبيه على قيم معامل ADDRESS BCC التي تتجاوز الطول الطبيعي (>255 حرف)
- تتبع شذوذ الجلسة الإدارية وتسجيلات الدخول المتزامنة من عناوين IP مختلفة
- تسجيل جميع التعديلات على تكوينات توجيه SMTP مع هوية المسؤول
التصحيح:
- الاتصال بدعم Endian للحصول على تحديثات الأمان؛ الترقية إلى الإصدار >3.3.25 عند توفره
- الاحتفاظ بنسخ احتياطية غير متصلة من تكوينات توجيه SMTP قبل تطبيق التصحيحات
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policies (administrative access restrictions)
ECC 2024 A.6.2.1 - User Registration and De-registration (account management)
ECC 2024 A.6.2.2 - User Access Rights (principle of least privilege)
ECC 2024 A.7.1.1 - Information Security Policies and Procedures (secure configuration)
ECC 2024 A.12.2.1 - Change Management (patch management procedures)
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Asset Management (inventory of Endian Firewall instances)
SAMA CSF PR.AC-1 - Access Control (authentication and authorization)
SAMA CSF PR.AC-4 - Access Rights Management (administrative privileges)
SAMA CSF DE.CM-1 - Detection and Analysis (monitoring administrative activities)
SAMA CSF RS.MI-2 - Incident Response (containment of compromised sessions)
🟡 ISO 27001:2022
ISO 27001:2022 A.5.3 - Segregation of Duties (administrative role separation)
ISO 27001:2022 A.6.2 - User Registration and De-registration
ISO 27001:2022 A.8.2 - Privileged Access Rights (administrative access control)
ISO 27001:2022 A.8.3 - Information Access Restriction (need-to-know basis)
ISO 27001:2022 A.12.6.1 - Management of Technical Vulnerabilities (patch management)
🟣 PCI DSS v4.0.1
PCI DSS 2.1 - Configuration Standards (secure configuration of network devices)
PCI DSS 6.2 - Security Patches (timely patching of vulnerabilities)
PCI DSS 7.1 - Access Control (restrict access to cardholder data)
PCI DSS 8.1 - User Identification (unique user IDs for administrative access)
PCI DSS 8.2 - Authentication (strong authentication for administrative accounts)