📄 Description (English)
A weakness has been identified in D-Link DIR-513 1.10. The impacted element is the function formEasySetTimezone of the file /goform/formEasySetTimezone of the component boa. This manipulation of the argument curTime causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer.
🤖 AI Executive Summary
A critical stack-based buffer overflow vulnerability exists in D-Link DIR-513 router firmware version 1.10 affecting the timezone configuration function. The vulnerability allows remote unauthenticated attackers to execute arbitrary code by sending malicious input to the /goform/formEasySetTimezone endpoint. With no patch available and the product no longer supported, this poses significant risk to organizations still operating legacy D-Link infrastructure in Saudi Arabia.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 11:52
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi telecommunications providers (STC, Mobily, Zain), government agencies, and small-to-medium enterprises still utilizing D-Link DIR-513 routers for network perimeter defense. Banking sector organizations using these routers in branch offices or remote locations face elevated risk of network compromise. Healthcare facilities and critical infrastructure operators relying on legacy D-Link equipment are particularly vulnerable. The lack of vendor support and available patches makes remediation through traditional patching impossible, requiring immediate network segmentation and device replacement strategies.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Small and Medium Enterprises
Education
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify and inventory all D-Link DIR-513 devices in your network using network scanning tools (Nmap, Shodan)
2. Isolate affected devices from critical network segments and DMZs
3. Disable remote management access to the router's web interface (disable port 80/443 access from WAN)
4. Implement network segmentation to restrict traffic from DIR-513 devices
5. Monitor for exploitation attempts using IDS/IPS signatures
PATCHING GUIDANCE:
- No official patch is available from D-Link
- Firmware version 1.10 is end-of-life with no security updates planned
- Immediate device replacement with supported alternatives (TP-Link, Cisco, Fortinet) is strongly recommended
COMPENSATING CONTROLS:
1. Deploy WAF/IPS rules to block requests to /goform/formEasySetTimezone endpoint
2. Implement strict access controls limiting administrative access to router management interfaces
3. Place affected routers behind a security appliance with deep packet inspection
4. Disable UPnP and unnecessary services on the device
5. Change default credentials and implement strong authentication
6. Monitor syslog for suspicious timezone configuration attempts
DETECTION RULES:
- Alert on HTTP POST requests to /goform/formEasySetTimezone with oversized curTime parameter (>256 bytes)
- Monitor for unexpected process execution or shell spawning from boa process
- Track failed authentication attempts to router management interface
- Alert on unusual network traffic originating from DIR-513 devices to external IPs
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد وحصر جميع أجهزة D-Link DIR-513 في شبكتك باستخدام أدوات المسح (Nmap, Shodan)
2. عزل الأجهزة المتأثرة عن القطاعات الحرجة في الشبكة
3. تعطيل الوصول الإداري البعيد إلى واجهة الويب للموجه
4. تطبيق تقسيم الشبكة لتقييد حركة المرور من أجهزة DIR-513
5. مراقبة محاولات الاستغلال باستخدام توقيعات IDS/IPS
إرشادات التصحيح:
- لا يوجد تصحيح رسمي متاح من D-Link
- الإصدار 1.10 انتهى دعمه ولن يتلقى تحديثات أمان
- يُنصح بشدة باستبدال الجهاز الفوري بدائل مدعومة
الضوابط البديلة:
1. نشر قواعد WAF/IPS لحجب طلبات /goform/formEasySetTimezone
2. تطبيق ضوابط وصول صارمة على واجهات إدارة الموجه
3. وضع الأجهزة المتأثرة خلف جهاز أمان متقدم
4. تعطيل UPnP والخدمات غير الضرورية
5. تغيير بيانات الاعتماد الافتراضية وتطبيق المصادقة القوية
6. مراقبة السجلات للمحاولات المريبة لتغيير الإعدادات الزمنية
قواعد الكشف:
- تنبيهات على طلبات HTTP POST إلى /goform/formEasySetTimezone بمعاملات curTime كبيرة
- مراقبة تنفيذ العمليات غير المتوقعة من عملية boa
- تتبع محاولات المصادقة الفاشلة على واجهة إدارة الموجه
- تنبيهات على حركة المرور غير العادية من أجهزة DIR-513
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.8.1 - Asset Management and Inventory Control
ECC 2024 A.8.2 - Secure Configuration Management
ECC 2024 A.13.1 - Network Security and Segmentation
ECC 2024 A.14.2 - Vulnerability Management and Patch Management
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Physical and Cyber Assets Inventory
SAMA CSF PR.DS-6 - Secure Configuration Management
SAMA CSF PR.IP-12 - Vulnerability Management
SAMA CSF DE.CM-4 - Malicious Code Detection
🟡 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.8.2 - Terms and Conditions of Employment
ISO 27001:2022 A.14.2 - Vulnerability Management
🟣 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