📄 Description (English)
A security flaw has been discovered in Tenda F453 1.0.0.3. Affected by this issue is the function frmL7ProtForm of the file /goform/L7Prot of the component httpd. Performing a manipulation of the argument page results in buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.
🤖 AI Executive Summary
A critical remote buffer overflow vulnerability exists in Tenda F453 router firmware version 1.0.0.3 affecting the L7 protocol filtering function. The vulnerability allows unauthenticated remote attackers to execute arbitrary code by manipulating the 'page' parameter. With public exploit availability and widespread router deployment in Saudi networks, immediate patching is essential to prevent unauthorized access and lateral movement.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 03:12
🇸🇦 Saudi Arabia Impact Assessment
High impact on Saudi telecommunications infrastructure (STC, Mobily, Zain) and enterprise networks relying on Tenda routers for edge security. Banking sector (SAMA-regulated institutions) at risk if routers used in branch connectivity or VPN termination points. Government agencies (NCA oversight) vulnerable if Tenda devices deployed in network perimeters. Healthcare facilities using these routers for network segmentation face patient data exposure risks. Energy sector (ARAMCO, utilities) potentially compromised if routers control SCADA network access. SMEs across all sectors represent largest attack surface due to high Tenda adoption in Saudi market.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Banking and Financial Services (SAMA-regulated)
Government and Public Administration (NCA oversight)
Healthcare and Medical Facilities
Energy and Utilities (ARAMCO, regional utilities)
Small and Medium Enterprises (SMEs)
Education and Universities
Retail and E-commerce
🎯 MITRE ATT&CK Techniques
T1190 - Exploit Public-Facing Application (httpd service exploitation)
T1068 - Exploitation for Privilege Escalation (buffer overflow for code execution)
T1543 - Create or Modify System Process (potential persistence via compromised router)
T1071 - Application Layer Protocol (HTTP-based exploitation)
T1021 - Remote Services (lateral movement from compromised router)
T1040 - Traffic Capture or Redirection (man-in-the-middle from router position)
T1557 - Adversary-in-the-Middle (network traffic interception)
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda F453 devices running firmware 1.0.0.3 using network scanning tools (nmap, Shodan queries for Saudi IP ranges)
2. Isolate affected routers from production networks or restrict WAN access to httpd service (port 80/443)
3. Disable remote management features and restrict admin access to trusted IPs only
4. Monitor for exploitation attempts targeting /goform/L7Prot endpoint
PATCHING GUIDANCE:
1. Download latest firmware from Tenda official support portal (verify digital signatures)
2. Schedule maintenance windows for firmware updates on non-critical systems first
3. Backup router configurations before upgrade
4. Test updates in lab environment before production deployment
5. Verify successful upgrade by checking firmware version in device web interface
COMPENSATING CONTROLS (if patch unavailable):
1. Implement WAF rules blocking requests to /goform/L7Prot with suspicious 'page' parameters
2. Deploy network-based IPS signatures detecting buffer overflow payloads
3. Segment router management interfaces behind jump hosts/bastion servers
4. Enable detailed logging of all HTTP requests to httpd service
5. Implement rate limiting on httpd service to prevent brute force exploitation
DETECTION RULES:
1. Monitor for POST/GET requests to /goform/L7ProtForm with 'page' parameter exceeding 256 bytes
2. Alert on unusual process execution spawned by httpd process (code execution indicator)
3. Track failed authentication attempts followed by successful httpd access
4. Monitor for unexpected outbound connections from router to external C2 infrastructure
5. Log all firmware version changes and configuration modifications
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda F453 التي تعمل بالإصدار 1.0.0.3 باستخدام أدوات المسح (nmap، استعلامات Shodan للنطاقات السعودية)
2. عزل الموجهات المتأثرة عن شبكات الإنتاج أو تقييد الوصول إلى خدمة httpd (المنفذ 80/443)
3. تعطيل ميزات الإدارة البعيدة وتقييد وصول المسؤول إلى عناوين IP موثوقة فقط
4. مراقبة محاولات الاستغلال التي تستهدف نقطة النهاية /goform/L7Prot
إرشادات التصحيح:
1. تنزيل أحدث إصدار من جهاز التوجيه من بوابة دعم Tenda الرسمية (التحقق من التوقيعات الرقمية)
2. جدولة نوافذ الصيانة لتحديثات البرامج الثابتة على الأنظمة غير الحرجة أولاً
3. نسخ احتياطي لإعدادات جهاز التوجيه قبل الترقية
4. اختبار التحديثات في بيئة المختبر قبل نشرها في الإنتاج
5. التحقق من نجاح الترقية بفحص إصدار البرنامج الثابت في واجهة الويب
الضوابط البديلة (إذا لم يكن التصحيح متاحًا):
1. تطبيق قواعد WAF لحجب الطلبات إلى /goform/L7Prot بمعاملات 'page' مريبة
2. نشر توقيعات IPS المستندة إلى الشبكة للكشف عن حمولات تجاوز المخزن المؤقت
3. تقسيم واجهات إدارة الموجه خلف خوادم القفز/الحصن
4. تفعيل السجلات التفصيلية لجميع طلبات HTTP إلى خدمة httpd
5. تطبيق تحديد معدل على خدمة httpd لمنع استغلال القوة الغاشمة
قواعد الكشف:
1. مراقبة طلبات POST/GET إلى /goform/L7ProtForm بمعامل 'page' يتجاوز 256 بايت
2. التنبيه على تنفيذ العمليات غير المعتادة التي تم إطلاقها بواسطة عملية httpd
3. تتبع محاولات المصادقة الفاشلة متبوعة بالوصول الناجح إلى httpd
4. مراقبة الاتصالات الصادرة غير المتوقعة من الموجه إلى البنية التحتية الخارجية
5. تسجيل جميع تغييرات إصدار البرنامج الثابت والتعديلات على الإعدادات
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.8.1 - Asset Management (inventory and patch management of network devices)
ECC 2024 A.12.2 - Change Management (firmware update procedures)
ECC 2024 A.12.6 - Management of Technical Vulnerabilities (vulnerability assessment and remediation)
ECC 2024 A.13.1 - Network Security (network perimeter protection and segmentation)
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset Management and Inventory (identifying affected Tenda devices)
SAMA CSF PR.IP-12 - Security Patch Management (timely application of firmware updates)
SAMA CSF DE.CM-1 - Detection and Analysis (monitoring for exploitation attempts)
SAMA CSF RS.MI-2 - Incident Response (containment of compromised routers)
🟡 ISO 27001:2022
ISO 27001:2022 A.5.19 - Addressing information security in supplier relationships (vendor patch management)
ISO 27001:2022 A.8.1 - Asset management (inventory of network devices)
ISO 27001:2022 A.8.2 - Configuration management (secure router configuration)
ISO 27001:2022 A.8.7 - Removal of access rights (disabling unnecessary services)
ISO 27001:2022 A.12.2 - Change management (firmware update procedures)
ISO 27001:2022 A.12.6 - Management of technical vulnerabilities (patch management)
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Ensure all system components and software are protected from known vulnerabilities
PCI DSS 11.2 - Run automated vulnerability scanning tools regularly
PCI DSS 2.2.4 - Configure system security parameters to prevent misuse
🔗 References & Sources 5
🔗
https://github.com/Litengzheng/vul_db/blob/main/F453/vul_74/README.md
cna@vuldb.com
Exploit
Third Party Advisory
🔗
https://vuldb.com/?ctiid.347998
cna@vuldb.com
Permissions Required
VDB Entry
🔗
https://vuldb.com/?id.347998
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/?submit.759621
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://www.tenda.com.cn/
cna@vuldb.com
Product
📦 Affected Products / CPE 1 entries
tenda:f453_firmware:1.0.0.3