📄 Description (English)
A flaw has been found in Shenzhen Libituo Technology LBT-T300-HW1 up to 1.2.8. This issue affects the function start_single_service of the component Web Management Interface. Executing a manipulation of the argument vpn_pptp_server/vpn_l2tp_server can lead to buffer overflow. The attack can be executed remotely. The vendor was contacted early about this disclosure but did not respond in any way.
🤖 AI Executive Summary
A critical buffer overflow vulnerability exists in Shenzhen Libituo Technology LBT-T300-HW1 devices (up to version 1.2.8) affecting the Web Management Interface. Remote attackers can exploit this flaw by manipulating VPN configuration parameters (vpn_pptp_server/vpn_l2tp_server) to achieve code execution without authentication. The vendor has not responded to disclosure attempts, leaving no official patch available.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 6, 2026 23:18
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi telecommunications infrastructure (STC, Mobily, Zain) and government agencies using LBT-T300-HW1 devices for VPN connectivity and network management. Banking sector (SAMA-regulated institutions) relying on these devices for secure remote access faces critical exposure. Energy sector (ARAMCO, SEC) and healthcare organizations using these devices for network segmentation are at high risk. The lack of vendor response and absence of patches creates persistent vulnerability in critical infrastructure.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Banking and Financial Services (SAMA-regulated)
Government and Public Administration (NCA, NCSC)
Energy (ARAMCO, SEC)
Healthcare
Critical Infrastructure
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify and inventory all LBT-T300-HW1 devices in your network (versions up to 1.2.8)
2. Isolate affected devices from internet-facing networks immediately
3. Restrict access to Web Management Interface to trusted IP ranges only
4. Disable VPN services (PPTP/L2TP) if not actively required
5. Monitor for suspicious VPN configuration changes and buffer overflow exploitation attempts
COMPENSATING CONTROLS:
6. Implement network segmentation - place devices behind WAF/IPS with buffer overflow detection rules
7. Deploy IDS/IPS signatures detecting malformed vpn_pptp_server/vpn_l2tp_server parameters
8. Enable detailed logging of Web Management Interface access and configuration changes
9. Implement strict input validation at network perimeter
10. Consider replacing affected devices with patched alternatives from vendor or alternative manufacturers
DETECTION RULES:
- Monitor HTTP POST requests to Web Management Interface with oversized vpn_pptp_server or vpn_l2tp_server parameters
- Alert on unexpected process execution following Web Management Interface access
- Track configuration changes to VPN settings without authorized requests
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد وحصر جميع أجهزة LBT-T300-HW1 في شبكتك (الإصدارات حتى 1.2.8)
2. عزل الأجهزة المتأثرة عن الشبكات المتصلة بالإنترنت فوراً
3. تقييد الوصول إلى واجهة إدارة الويب على نطاقات IP موثوقة فقط
4. تعطيل خدمات VPN (PPTP/L2TP) إذا لم تكن مطلوبة بنشاط
5. مراقبة محاولات تغيير تكوين VPN المريبة واستغلال تجاوز المخزن المؤقت
الضوابط البديلة:
6. تنفيذ تقسيم الشبكة - ضع الأجهزة خلف WAF/IPS مع قواعد كشف تجاوز المخزن المؤقت
7. نشر توقيعات IDS/IPS للكشف عن معاملات vpn_pptp_server أو vpn_l2tp_server المشوهة
8. تفعيل تسجيل مفصل لوصول واجهة إدارة الويب وتغييرات التكوين
9. تنفيذ التحقق الصارم من صحة الإدخال على محيط الشبكة
10. النظر في استبدال الأجهزة المتأثرة ببدائل معدلة من البائع أو الشركات المصنعة البديلة
قواعد الكشف:
- مراقبة طلبات HTTP POST إلى واجهة إدارة الويب بمعاملات vpn_pptp_server أو vpn_l2tp_server كبيرة الحجم
- تنبيه عند تنفيذ عملية غير متوقعة بعد الوصول إلى واجهة إدارة الويب
- تتبع تغييرات التكوين لإعدادات VPN بدون طلبات مصرح بها
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Network access control and segmentation
ECC 2024 A.5.2.1 - Secure configuration management
ECC 2024 A.6.2.1 - Vulnerability management and patching
ECC 2024 A.8.1.1 - Monitoring and logging of security events
🔵 SAMA CSF
SAMA CSF ID.BE-1 - Asset management and inventory
SAMA CSF PR.AC-1 - Access control policies and procedures
SAMA CSF PR.DS-6 - Secure configuration of systems
SAMA CSF DE.CM-1 - Detection and monitoring of anomalies
🟡 ISO 27001:2022
ISO 27001:2022 A.5.15 - Supplier relationships
ISO 27001:2022 A.8.1 - User endpoint devices
ISO 27001:2022 A.8.2 - Privileged access rights
ISO 27001:2022 A.8.6 - Access control to information
🟣 PCI DSS v4.0.1
PCI DSS 2.2.4 - Configure system security parameters
PCI DSS 6.2 - Ensure security patches are installed
PCI DSS 11.2 - Run automated vulnerability scans
🔗 References & Sources 5