📄 Description (English)
A flaw has been found in D-Link DIR-513 1.10. This issue affects the function formAdvanceSetup of the file /goform/formAdvanceSetup of the component POST Request Handler. This manipulation of the argument webpage causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been published and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
🤖 AI Executive Summary
A critical buffer overflow vulnerability exists in D-Link DIR-513 router firmware version 1.10 affecting the POST request handler. The vulnerability allows remote attackers to execute arbitrary code by manipulating the 'webpage' parameter in the formAdvanceSetup function. With no patch available and the product reaching end-of-life, organizations using this router face significant risk of complete system compromise.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 06:00
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using D-Link DIR-513 routers in network infrastructure face critical risk. Primary impact sectors: Government agencies (NCA, CITC), Banking sector (SAMA-regulated institutions), Telecommunications (STC, Mobily), Healthcare facilities, and Energy sector (ARAMCO subsidiaries). The vulnerability enables complete device takeover, allowing attackers to intercept communications, establish persistent backdoors, and pivot into internal networks. Organizations with legacy network equipment in critical infrastructure are at highest risk.
🏢 Affected Saudi Sectors
Government
Banking
Telecommunications
Healthcare
Energy
Critical Infrastructure
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all D-Link DIR-513 devices in your network using network scanning tools (nmap, Shodan queries)
2. Isolate affected devices from critical network segments if replacement is not immediately possible
3. Implement network segmentation to restrict access to the router's management interface
4. Change default credentials immediately and enforce strong passwords
5. Disable remote management features (WAN access to admin interface)
6. Monitor router logs for suspicious POST requests to /goform/formAdvanceSetup
PATCHING GUIDANCE:
- No official patch is available from D-Link for this end-of-life product
- REPLACEMENT IS MANDATORY: Procure replacement routers from supported vendors (Cisco, Juniper, Fortinet)
- Plan immediate hardware replacement within 30 days
COMPENSATING CONTROLS:
1. Deploy Web Application Firewall (WAF) rules to block POST requests with suspicious 'webpage' parameters
2. Implement IDS/IPS signatures to detect buffer overflow attempts
3. Restrict administrative access via VPN only with multi-factor authentication
4. Enable detailed logging and forward logs to SIEM for analysis
5. Implement network access control (NAC) to prevent unauthorized device connections
DETECTION RULES:
- Monitor for POST requests to /goform/formAdvanceSetup with oversized 'webpage' parameters (>1024 bytes)
- Alert on any successful authentication followed by formAdvanceSetup requests
- Track firmware version queries and configuration changes
- Monitor for unusual process execution on router (if accessible via SSH)
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة D-Link DIR-513 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan)
2. عزل الأجهزة المتأثرة عن القطاعات الحرجة في الشبكة إذا لم يكن الاستبدال ممكناً فوراً
3. تطبيق تقسيم الشبكة لتقييد الوصول إلى واجهة إدارة الجهاز
4. تغيير بيانات الاعتماد الافتراضية فوراً وفرض كلمات مرور قوية
5. تعطيل ميزات الإدارة البعيدة (الوصول عبر WAN إلى واجهة المسؤول)
6. مراقبة سجلات الجهاز للطلبات المريبة إلى /goform/formAdvanceSetup
إرشادات التصحيح:
- لا يتوفر تصحيح رسمي من D-Link لهذا المنتج المنتهي الدعم
- الاستبدال إلزامي: الحصول على أجهزة توجيه بديلة من موردين مدعومين
- التخطيط لاستبدال الأجهزة الفورية خلال 30 يوماً
الضوابط البديلة:
1. نشر قواعد جدار حماية تطبيقات الويب لحجب طلبات POST المريبة
2. تطبيق توقيعات IDS/IPS للكشف عن محاولات تجاوز المخزن المؤقت
3. تقييد الوصول الإداري عبر VPN فقط مع المصادقة متعددة العوامل
4. تفعيل السجلات التفصيلية وإعادة توجيهها إلى SIEM
5. تطبيق التحكم في الوصول إلى الشبكة (NAC) لمنع اتصالات الأجهزة غير المصرح بها
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.8.1 - Asset Management and Inventory Control
ECC 2024 A.8.2 - Information and Other Assets
ECC 2024 A.13.1 - Network Security
ECC 2024 A.14.2 - System Development and Maintenance
ECC 2024 A.16.1 - Information Security Incident Management
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Physical Devices and Software Assets
SAMA CSF PR.AC-1 - Access Control Policy
SAMA CSF PR.DS-1 - Data Security Management
SAMA CSF DE.CM-1 - Network Monitoring
SAMA CSF RS.MI-1 - Incident Response Procedures
🟡 ISO 27001:2022
ISO 27001:2022 A.5.19 - Inventory of Information and Other Assets
ISO 27001:2022 A.8.1 - Screening
ISO 27001:2022 A.8.3 - Termination or Change of Employment
ISO 27001:2022 A.13.1 - Network Controls
ISO 27001:2022 A.14.2 - System Development and Maintenance
🟣 PCI DSS v4.0.1
PCI DSS 1.1 - Firewall Configuration Standards
PCI DSS 2.1 - Default Passwords and Security Parameters
PCI DSS 6.2 - Security Patches and Updates
PCI DSS 11.3 - Penetration Testing
🔗 References & Sources 5