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Vulnerabilities

CVE-2023-21674

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Microsoft Windows ALPC Privilege Escalation Vulnerability (CVE-2023-21674)
Published: Jan 10, 2023  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Microsoft Windows Advanced Local Procedure Call (ALPC) Privilege Escalation Vulnerability — Microsoft Windows Advanced Local Procedure Call (ALPC) contains an unspecified vulnerability that allows for privilege escalation.

🤖 AI Executive Summary

CVE-2023-21674 is a critical privilege escalation vulnerability in Microsoft Windows ALPC (Advanced Local Procedure Call) with a CVSS score of 9.0. An attacker with local access can exploit this vulnerability to escalate privileges to SYSTEM level, potentially compromising entire systems. Immediate patching is essential as exploits are publicly available and actively used in targeted attacks against critical infrastructure.

📄 Description (Arabic)

تحتوي خدمة Advanced Local Procedure Call (ALPC) في نظام التشغيل Windows على ثغرة غير محددة تسمح بتصعيد الامتيازات من حساب محدود إلى امتيازات النظام. يمكن للمهاجمين الذين لديهم وصول محلي استغلال هذه الثغرة للحصول على تحكم كامل بالنظام. تم تأكيد استغلال هذه الثغرة بنشاط من قبل جهات تهديد متقدمة. تتطلب هذه الثغرة تطبيق التصحيحات الأمنية الفورية على جميع الأنظمة المتأثرة.

🤖 ملخص تنفيذي (AI)

CVE-2023-21674 عبارة عن ثغرة حرجة في مكون Advanced Local Procedure Call (ALPC) في نظام Windows تسمح بتصعيد الامتيازات برصيد CVSS 9.0. يمكن لمهاجم لديه وصول محلي استغلال هذه الثغرة للوصول إلى مستوى SYSTEM وتعريض النظام بأكمله للخطر. يعتبر التصحيح الفوري ضروريًا حيث أن الاستغلالات متاحة علنًا وتُستخدم في هجمات موجهة ضد البنية التحتية الحرجة.

🤖 AI Intelligence Analysis Analyzed: Apr 20, 2026 16:16
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses severe risk to Saudi critical infrastructure sectors: Banking (SAMA-regulated institutions, payment processing systems), Government (NCA, ministries, security agencies), Energy (ARAMCO, power utilities), Telecommunications (STC, Mobily, Zain), and Healthcare (MOH facilities). Local privilege escalation can lead to complete system compromise, lateral movement within networks, and potential access to sensitive national data. Organizations running unpatched Windows systems face immediate risk of compromise by threat actors targeting Saudi infrastructure.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Energy and Utilities Telecommunications Healthcare Defense and Security Critical Infrastructure
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Windows systems in your environment using asset management tools
2. Prioritize patching for critical systems: domain controllers, servers, workstations with elevated privileges
3. Apply Microsoft security updates KB5022282 (Windows 10/11) or equivalent patches for your Windows version immediately
4. Restart systems after patching to ensure vulnerability is remediated

COMPENSATING CONTROLS (if immediate patching not possible):
5. Restrict local access and implement strict access controls
6. Disable unnecessary services and disable ALPC if not required
7. Monitor for suspicious privilege escalation attempts
8. Implement application whitelisting to prevent unauthorized code execution
9. Use Windows Defender/Endpoint Detection and Response (EDR) solutions

DETECTION:
10. Monitor Windows Event Logs for privilege escalation events (Event ID 4688, 4689)
11. Alert on suspicious ALPC calls and process creation with elevated privileges
12. Deploy YARA rules to detect known exploit patterns
13. Monitor for unusual process behavior and token impersonation attempts
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أنظمة Windows في بيئتك باستخدام أدوات إدارة الأصول
2. إعطاء الأولوية لتصحيح الأنظمة الحرجة: متحكمات المجال والخوادم والمحطات الطرفية
3. تطبيق تحديثات أمان Microsoft KB5022282 أو التصحيحات المكافئة فورًا
4. إعادة تشغيل الأنظمة بعد التصحيح

الضوابط البديلة (إذا لم يكن التصحيح الفوري ممكنًا):
5. تقييد الوصول المحلي وتطبيق ضوابط وصول صارمة
6. تعطيل الخدمات غير الضرورية وتعطيل ALPC إن لم تكن مطلوبة
7. مراقبة محاولات تصعيد الامتيازات المريبة
8. تطبيق قائمة بيضاء للتطبيقات
9. استخدام حلول Windows Defender و EDR

الكشف:
10. مراقبة سجلات Windows للأحداث المريبة (Event ID 4688, 4689)
11. تنبيهات على استدعاءات ALPC المريبة
12. نشر قواعد YARA للكشف عن أنماط الاستغلال
13. مراقبة سلوك العمليات غير العادي
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.6.1 - Management of technical vulnerabilities ECC 2024 A.12.2.1 - Change management procedures ECC 2024 A.5.2.1 - Information security policies and procedures ECC 2024 A.12.1.1 - Operational change control
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification PR.IP-12 - System and information integrity DE.CM-8 - Vulnerability scans RS.MI-2 - Incident response and recovery
🟡 ISO 27001:2022
A.12.3.1 - Segregation of development, test and production environments A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy A.12.2.1 - Change management
🟣 PCI DSS v4.0
Requirement 6.2 - Security patches and updates Requirement 11.2 - Vulnerability scanning
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Microsoft:Windows
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS12.43%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2023-01-31
Published 2023-01-10
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
9.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
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