📄 Description (English)
Microsoft Active Directory Domain Services Privilege Escalation Vulnerability — Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
🤖 AI Executive Summary
CVE-2021-42278 is a critical privilege escalation vulnerability in Microsoft Active Directory Domain Services (CVSS 9.0) that allows unauthenticated or low-privileged attackers to escalate privileges within AD environments. This vulnerability is particularly severe as Active Directory is the foundational identity and access management system for most Saudi organizations. With public exploits available, this poses an immediate and significant risk to all organizations relying on AD for authentication and authorization.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 21, 2026 11:18
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability affects virtually all Saudi organizations using Active Directory, with highest impact on: Banking sector (SAMA-regulated institutions managing critical financial infrastructure), Government agencies (NCA, ministries relying on AD for access control), Healthcare providers (MOH facilities managing patient data), Energy sector (ARAMCO and downstream operators), Telecommunications (STC, Mobily, Zain using AD for enterprise authentication), and Large enterprises across all sectors. Successful exploitation could lead to complete compromise of AD environments, enabling lateral movement, data exfiltration, and persistent access across entire organizational networks.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare and Medical Services
Energy and Utilities
Telecommunications
Large Enterprises
Education and Universities
Defense and Security
🎯 MITRE ATT&CK Techniques
T1078 - Valid Accounts
T1548 - Abuse Elevation Control Mechanism
T1134 - Access Token Manipulation
T1098 - Account Manipulation
T1556 - Modify Authentication Process
T1556.001 - Domain Controller Authentication
T1558 - Steal or Forge Kerberos Tickets
T1558.001 - Kerberos Ticket Granting Ticket (TGT)
T1558.002 - Service Ticket
T1558.003 - Kerberoasting
T1550 - Use Alternate Authentication Material
T1550.001 - Application Access Token
T1550.002 - Pass the Hash
T1550.003 - Pass the Ticket
T1550.004 - Windows Admin Shares
T1021 - Remote Services
T1021.006 - Windows Remote Management
⚖️ Saudi Risk Score (AI)
9.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Apply Microsoft security updates KB5008102 (Windows Server 2016/2019/2022) or later immediately to all Domain Controllers
2. Implement network segmentation to restrict access to Domain Controllers from untrusted networks
3. Enable Enhanced Security Admin Environment (ESAE) or Red Forest architecture if not already deployed
4. Monitor all Domain Controller logs for suspicious authentication attempts and privilege escalation activities
PATCHING GUIDANCE:
1. Prioritize patching all Domain Controllers in production environments within 48 hours
2. Test patches in non-production AD environments first
3. Coordinate patching with change management to minimize business disruption
4. Ensure all domain-joined servers and workstations are also patched
COMPENSATING CONTROLS (if immediate patching not possible):
1. Restrict logon rights to Domain Controllers to authorized administrators only
2. Implement Privileged Access Workstations (PAWs) for all AD administrative activities
3. Enable MFA for all administrative accounts
4. Deploy Windows Defender for Identity (formerly ATA) to detect suspicious AD activities
5. Implement strict Group Policy restrictions on service account usage
DETECTION RULES:
1. Monitor Event ID 4742 (Computer account changed) for unauthorized changes
2. Alert on Event ID 4768 (Kerberos authentication ticket requested) with suspicious service principals
3. Track Event ID 4769 (Kerberos service ticket requested) for unusual service account access
4. Monitor for unexpected privilege group membership changes (Event ID 4728, 4729, 4730, 4732, 4733, 4756)
5. Implement SIEM rules to detect Kerberos pre-authentication bypass attempts
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تطبيق تحديثات أمان Microsoft KB5008102 (Windows Server 2016/2019/2022) أو أحدث فوراً على جميع Domain Controllers
2. تنفيذ تقسيم الشبكة لتقييد الوصول إلى Domain Controllers من الشبكات غير الموثوقة
3. تفعيل بيئة المسؤول الآمن المحسّنة (ESAE) أو معمارية Red Forest إن لم تكن مطبقة
4. مراقبة سجلات Domain Controller لاكتشاف محاولات المصادقة المريبة وأنشطة تصعيد الامتيازات
إرشادات التصحيح:
1. أولويات تصحيح جميع Domain Controllers في بيئات الإنتاج خلال 48 ساعة
2. اختبار التصحيحات في بيئات AD غير الإنتاجية أولاً
3. تنسيق التصحيح مع إدارة التغيير لتقليل انقطاع الأعمال
4. التأكد من تصحيح جميع الخوادم والمحطات الطرفية المرتبطة بالمجال
الضوابط البديلة (إذا لم يكن التصحيح الفوري ممكناً):
1. تقييد حقوق تسجيل الدخول إلى Domain Controllers للمسؤولين المصرح لهم فقط
2. تنفيذ محطات عمل الوصول المميز (PAWs) لجميع أنشطة إدارة AD
3. تفعيل المصادقة متعددة العوامل لجميع حسابات المسؤولين
4. نشر Windows Defender for Identity لاكتشاف أنشطة AD المريبة
5. تنفيذ قيود Group Policy صارمة على استخدام حسابات الخدمة
قواعد الكشف:
1. مراقبة Event ID 4742 (تم تغيير حساب الكمبيوتر) للتغييرات غير المصرح بها
2. التنبيه على Event ID 4768 (تم طلب تذكرة مصادقة Kerberos) مع مبادئ خدمة مريبة
3. تتبع Event ID 4769 (تم طلب تذكرة خدمة Kerberos) للوصول غير المعتاد لحساب الخدمة
4. مراقبة التغييرات غير المتوقعة في عضوية مجموعة الامتيازات (Event ID 4728, 4729, 4730, 4732, 4733, 4756)
5. تنفيذ قواعد SIEM للكشف عن محاولات تجاوز المصادقة المسبقة لـ Kerberos
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Policies and procedures for access control
A.5.2.1 - User registration and de-registration
A.5.2.2 - User access provisioning
A.5.2.3 - Management of privileged access rights
A.5.3.1 - Management of secret authentication information
A.8.2.1 - User endpoint devices
A.8.2.2 - Privileged access rights
A.8.2.3 - Information access restriction
A.8.2.4 - Access to program source code
🔵 SAMA CSF
ID.AM-1 - Asset Management
ID.AM-2 - Business Environment
PR.AC-1 - Access Control Policy
PR.AC-2 - Physical and Logical Access Control
PR.AC-3 - Remote Access
PR.AC-4 - Access Management
PR.AC-5 - Identifier Management
PR.AC-6 - Privilege Management
PR.AC-7 - User, Process, and Device Authentication
DE.CM-1 - Detection Processes
🟡 ISO 27001:2022
5.3 - Segregation of duties
6.2 - Competence
8.2 - Privileged access rights
8.3 - Information access restriction
A.5.1.1 - Policies for access control
A.5.2 - User access management
A.5.3 - Management of secret authentication information
A.8.2 - User endpoint devices
A.8.3 - Logging
🟣 PCI DSS v4.0
Requirement 2 - Default security parameters
Requirement 7 - Restrict access to data by business need
Requirement 8 - Identify and authenticate access
Requirement 10 - Track and monitor access to network resources
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Microsoft:Active Directory