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Vulnerabilities

CVE-2018-8120

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Microsoft Win32k Privilege Escalation Vulnerability — A privilege escalation vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory.
Published: Mar 15, 2022  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Microsoft Win32k Privilege Escalation Vulnerability — A privilege escalation vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory.

🤖 AI Executive Summary

CVE-2018-8120 is a critical privilege escalation vulnerability in the Microsoft Win32k component that allows an attacker to execute arbitrary code in kernel mode by exploiting improper handling of objects in memory. This vulnerability has known public exploits actively used in the wild, including by APT groups, making it extremely dangerous. With a CVSS score of 9.0, successful exploitation allows a local attacker to gain SYSTEM-level privileges from a low-privileged account. Organizations running unpatched Windows systems (Windows 7, Server 2008) are at immediate risk.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 11, 2026 14:17
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations still running legacy Windows systems (Windows 7, Server 2008/2008 R2). Government entities under NCA oversight, banking institutions regulated by SAMA, and critical infrastructure including energy sector (ARAMCO, SABIC) and telecom providers (STC, Mobily, Zain) are at high risk if legacy systems remain unpatched. Saudi healthcare systems and educational institutions often maintain older Windows deployments that are particularly vulnerable. Given that this exploit is actively weaponized and available in common exploitation frameworks like Metasploit, it is frequently used as a post-exploitation privilege escalation step in targeted attacks against Middle Eastern organizations.
🏢 Affected Saudi Sectors
Government Banking Energy Telecom Healthcare Education Defense
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Apply Microsoft security update KB4103712 (May 2018 Patch Tuesday) immediately on all affected systems (Windows 7, Windows Server 2008, Windows Server 2008 R2)
2. Prioritize patching internet-facing and critical infrastructure systems first

Detection & Monitoring:
3. Monitor for suspicious Win32k.sys activity and unusual privilege escalation attempts
4. Deploy EDR rules to detect exploitation patterns: unusual NtUserSetImeInfoEx calls and SetWindowLongPtr manipulation
5. Enable Windows Event Log auditing for process creation (Event ID 4688) with command-line logging
6. Implement YARA rules for known CVE-2018-8120 exploit binaries

Compensating Controls:
7. Enforce least privilege principles — remove local administrator rights from standard users
8. Implement application whitelisting to prevent unauthorized code execution
9. Segment networks to limit lateral movement if exploitation occurs
10. Migrate legacy Windows 7/Server 2008 systems to supported OS versions (Windows 10/11, Server 2019/2022)

Long-term:
11. Establish a vulnerability management program with SLA-based patching timelines
12. Conduct regular vulnerability assessments focusing on kernel-level vulnerabilities
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تطبيق تحديث مايكروسوفت الأمني KB4103712 (تحديث مايو 2018) فوراً على جميع الأنظمة المتأثرة (ويندوز 7، ويندوز سيرفر 2008، ويندوز سيرفر 2008 R2)
2. إعطاء الأولوية لتحديث الأنظمة المواجهة للإنترنت والبنية التحتية الحرجة أولاً

الكشف والمراقبة:
3. مراقبة النشاط المشبوه في Win32k.sys ومحاولات تصعيد الصلاحيات غير العادية
4. نشر قواعد EDR للكشف عن أنماط الاستغلال: استدعاءات NtUserSetImeInfoEx غير العادية والتلاعب بـ SetWindowLongPtr
5. تفعيل تدقيق سجل أحداث ويندوز لإنشاء العمليات (معرف الحدث 4688) مع تسجيل سطر الأوامر
6. تطبيق قواعد YARA للكشف عن ملفات استغلال CVE-2018-8120 المعروفة

الضوابط التعويضية:
7. تطبيق مبدأ الحد الأدنى من الصلاحيات — إزالة صلاحيات المسؤول المحلي من المستخدمين العاديين
8. تطبيق القوائم البيضاء للتطبيقات لمنع تنفيذ التعليمات البرمجية غير المصرح بها
9. تقسيم الشبكات للحد من الحركة الجانبية في حالة الاستغلال
10. ترحيل أنظمة ويندوز 7/سيرفر 2008 القديمة إلى إصدارات مدعومة (ويندوز 10/11، سيرفر 2019/2022)

على المدى الطويل:
11. إنشاء برنامج إدارة الثغرات مع جداول زمنية للتحديث بناءً على اتفاقيات مستوى الخدمة
12. إجراء تقييمات منتظمة للثغرات مع التركيز على ثغرات مستوى النواة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC-2:3-1 (Patch Management) ECC-2:3-2 (Vulnerability Management) ECC-2:2-1 (Asset Management) ECC-2:5-1 (Event Logging and Monitoring)
🔵 SAMA CSF
3.3.3 (Patch Management) 3.3.4 (Vulnerability Management) 3.3.7 (Endpoint Security) 3.4.1 (Security Event Logging) 3.3.1 (Asset Management)
🟡 ISO 27001:2022
A.8.8 (Management of Technical Vulnerabilities) A.8.7 (Protection Against Malware) A.8.15 (Logging) A.8.9 (Configuration Management)
🟣 PCI DSS v4.0
6.3.3 (Install Critical Security Patches Within One Month) 11.3 (Penetration Testing) 5.2 (Deploy Anti-Malware Solutions) 10.2 (Audit Log Implementation)
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Microsoft:Win32k
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS94.15%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2022-04-05
Published 2022-03-15
Source Feed cisa_kev
Views 2
🇸🇦 Saudi Risk Score
9.2
/ 10.0 — Saudi Risk
🏷️ Tags
kev actively-exploited ransomware
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