📄 Description (English)
Terminal Services Manager 3.1 contains a stack-based buffer overflow vulnerability in the computer names field that allows local attackers to execute arbitrary code by triggering structured exception handling. Attackers can craft a malicious input file with shellcode and jump instructions that overwrite the SEH handler pointer to execute calc.exe or other payloads when imported through the add computers wizard.
🤖 AI Executive Summary
CVE-2018-25259 is a stack-based buffer overflow in Terminal Services Manager 3.1 affecting the computer names field, allowing local attackers to execute arbitrary code via structured exception handling (SEH) exploitation. With a CVSS score of 8.4 and no available patch, this vulnerability poses significant risk to organizations still using this legacy software. The attack requires local access and crafted input through the add computers wizard, making it a critical concern for administrative workstations in Saudi enterprises.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 24, 2026 09:18
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi government agencies, financial institutions, and large enterprises still operating legacy Terminal Services Manager 3.1 installations on administrative workstations. High-risk sectors include: SAMA-regulated banking institutions managing critical financial infrastructure, NCA-overseen government agencies using older terminal services for administrative access, healthcare organizations (MOH) managing patient data systems, and energy sector operators (ARAMCO, SEC) controlling SCADA/industrial systems. The local-access requirement limits exposure but poses severe risk for insider threats and compromised administrative accounts within these critical sectors.
🏢 Affected Saudi Sectors
Government
Banking
Healthcare
Energy
Telecommunications
Defense
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all systems running Terminal Services Manager 3.1 across your organization
2. Restrict local access to administrative workstations running this software to trusted personnel only
3. Implement application whitelisting to prevent unauthorized executable execution
4. Monitor for suspicious SEH handler modifications and stack overflow attempts
Compensating Controls (No Patch Available):
1. Migrate to modern terminal services solutions (Windows Remote Desktop Services, Citrix, or equivalent)
2. Implement Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) at OS level
3. Run Terminal Services Manager 3.1 in a restricted user context with minimal privileges
4. Isolate affected systems on segmented networks with strict access controls
5. Disable the add computers wizard functionality if not required
Detection Rules:
1. Monitor for abnormal process creation from Terminal Services Manager processes
2. Alert on SEH handler pointer modifications in memory
3. Track execution of calc.exe or unexpected child processes from Terminal Services Manager
4. Log all imports through the add computers wizard with input validation
5. Monitor for stack-based buffer overflow patterns in application logs
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع الأنظمة التي تعمل بـ Terminal Services Manager 3.1 في مؤسستك
2. قيد الوصول المحلي إلى محطات العمل الإدارية التي تعمل بهذا البرنامج للموظفين الموثوقين فقط
3. طبق قائمة التطبيقات المسموحة لمنع تنفيذ الملفات التنفيذية غير المصرح بها
4. راقب محاولات تعديل معالجات SEH وتجاوز المخزن المؤقت
الضوابط البديلة (لا يوجد تصحيح متاح):
1. انتقل إلى حلول خدمات الطرفية الحديثة (Windows Remote Desktop Services أو Citrix)
2. طبق Data Execution Prevention (DEP) و Address Space Layout Randomization (ASLR) على مستوى نظام التشغيل
3. قم بتشغيل Terminal Services Manager 3.1 في سياق مستخدم مقيد بامتيازات دنيا
4. عزل الأنظمة المتأثرة على شبكات مقسمة بضوابط وصول صارمة
5. عطل معالج إضافة الأجهزة إذا لم يكن مطلوباً
قواعد الكشف:
1. راقب إنشاء العمليات غير الطبيعية من عمليات Terminal Services Manager
2. أصدر تنبيهات عند تعديل مؤشرات معالجات SEH في الذاكرة
3. تتبع تنفيذ calc.exe أو العمليات الفرعية غير المتوقعة
4. سجل جميع الواردات من خلال معالج إضافة الأجهزة مع التحقق من الصحة
5. راقب أنماط تجاوز المخزن المؤقت القائمة على المكدس
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Information Security Policies (legacy system management)
ECC 2024 A.8.1.1 - User Endpoint Devices (administrative workstation security)
ECC 2024 A.8.2.1 - Privileged Access Rights (local access restrictions)
ECC 2024 A.8.3.1 - Password Management (protection of administrative credentials)
ECC 2024 A.12.2.1 - Change Management (legacy system retirement planning)
🔵 SAMA CSF
SAMA CSF ID.AM-2 - Asset Management (inventory legacy systems)
SAMA CSF PR.AC-1 - Access Control (restrict local access)
SAMA CSF PR.DS-5 - Protective Technology (DEP/ASLR implementation)
SAMA CSF DE.CM-1 - Detection Processes (monitor for exploitation attempts)
SAMA CSF RS.MI-2 - Incident Mitigation (isolation and containment)
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for information security (legacy system governance)
ISO 27001:2022 A.8.1 - User endpoint devices (workstation hardening)
ISO 27001:2022 A.8.2 - Privileged access rights (principle of least privilege)
ISO 27001:2022 A.8.3 - Information access restriction (access controls)
ISO 27001:2022 A.12.2 - Change management (system lifecycle management)
🟣 PCI DSS v4.0.1
PCI DSS 2.4 - Document and implement policies for configuration of network components (legacy system management)
PCI DSS 6.2 - Ensure security patches are installed (compensating controls for unpatched systems)
PCI DSS 7.1 - Restrict access to cardholder data (if payment systems affected)