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Vulnerabilities

CVE-2019-1458

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Microsoft Win32k Privilege Escalation Vulnerability (CVE-2019-1458)
Published: Jan 10, 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, aka 'Win32k EoP.

🤖 AI Executive Summary

CVE-2019-1458 is a critical privilege escalation vulnerability in the Windows Win32k kernel component that allows local attackers to execute arbitrary code in kernel mode by exploiting improper memory object handling. With a CVSS score of 9.0 and confirmed public exploits available, this vulnerability enables attackers to elevate from standard user to SYSTEM-level privileges, effectively bypassing all user-mode security controls. The vulnerability has been actively exploited in the wild, including by advanced persistent threat (APT) groups, making it a high-priority patching target. Organizations running unpatched Windows systems face complete system compromise once an attacker gains initial access.

📄 Description (Arabic)

تؤثر هذه الثغرة على مكون Win32k في نظام التشغيل Windows وتنشأ من فشل المكون في معالجة كائنات الذاكرة بشكل صحيح. يمكن للمهاجمين المحليين استغلال هذه الثغرة للحصول على امتيازات النظام الكاملة. تم تصنيف الثغرة كحرجة مع درجة CVSS بقيمة 9.0 وتم تضمينها في قائمة الثغرات المستغلة بنشاط (KEV).

🤖 ملخص تنفيذي (AI)

CVE-2019-1458 هي ثغرة أمنية حرجة في مكوّن Win32k الخاص بنواة نظام Windows تتيح للمهاجمين المحليين تنفيذ تعليمات برمجية عشوائية في وضع النواة من خلال استغلال معالجة غير صحيحة لكائنات الذاكرة. بدرجة CVSS تبلغ 9.0 مع وجود ثغرات استغلال عامة مؤكدة، تُمكّن هذه الثغرة المهاجمين من رفع صلاحياتهم من مستخدم عادي إلى مستوى SYSTEM، مما يتجاوز فعلياً جميع ضوابط الأمان في وضع المستخدم. تم استغلال هذه الثغرة بشكل نشط في البيئات الحقيقية، بما في ذلك من قِبل مجموعات التهديد المتقدم المستمر (APT)، مما يجعلها هدفاً ذا أولوية قصوى للتصحيح.

🤖 AI Intelligence Analysis Analyzed: Apr 14, 2026 10:57
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses a severe risk to Saudi organizations across all critical sectors. Government entities under NCA oversight and ARAMCO/energy sector systems running Windows infrastructure are at heightened risk given APT targeting of Saudi critical infrastructure (e.g., Shamoon, APT33). SAMA-regulated banking institutions using Windows-based trading and core banking systems could face complete compromise if exploited post-initial access. Healthcare organizations under MOH with limited patch management maturity are particularly vulnerable. Telecom operators like STC running Windows-based OSS/BSS systems face lateral movement risks. Given that this vulnerability has been weaponized by nation-state actors who have historically targeted Saudi Arabia, the risk is amplified significantly for government and energy sectors.
🏢 Affected Saudi Sectors
Government Energy Banking Healthcare Telecom Defense Transportation Education
⚖️ Saudi Risk Score (AI)
9.4
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS (0-24 hours):
1. Apply Microsoft Security Update KB4530734 (December 2019 Patch Tuesday) immediately across all Windows systems
2. Prioritize patching of internet-facing systems, domain controllers, and privileged workstations first
3. Isolate any systems showing signs of exploitation or anomalous privilege escalation activity

PATCHING GUIDANCE:
1. Download and deploy patches from Microsoft Update Catalog for all affected Windows versions (Windows 7, 8.1, 10, Server 2008/2012/2016/2019)
2. Verify patch deployment using WSUS, SCCM, or equivalent patch management tools
3. Confirm patch installation by checking for KB4530734 in installed updates

COMPENSATING CONTROLS (if patching is delayed):
1. Restrict local logon rights to minimize attack surface — enforce least privilege
2. Deploy application whitelisting (AppLocker/Windows Defender Application Control) to prevent execution of exploit payloads
3. Enable Windows Defender Credential Guard to limit post-exploitation impact
4. Monitor for suspicious Win32k API calls and kernel-mode activity
5. Restrict physical and RDP access to critical systems

DETECTION RULES:
1. Monitor for unexpected SYSTEM-level process creation from user-mode processes
2. Alert on Win32k.sys crash dumps or kernel exception logs
3. Deploy Sigma rule: detect processes spawning cmd.exe or powershell.exe with SYSTEM privileges from non-administrative user sessions
4. Enable Sysmon Event ID 1 (Process Create) and monitor for privilege escalation patterns
5. Review Windows Event Log ID 4672 (Special privileges assigned) for anomalous entries
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية (خلال 0-24 ساعة):
1. تطبيق تحديث Microsoft الأمني KB4530734 (تحديث ديسمبر 2019) فوراً على جميع أنظمة Windows
2. إعطاء الأولوية لتصحيح الأنظمة المواجهة للإنترنت ووحدات التحكم بالنطاق والمحطات ذات الامتيازات أولاً
3. عزل أي أنظمة تُظهر علامات استغلال أو نشاط غير طبيعي في رفع الامتيازات

إرشادات التصحيح:
1. تنزيل ونشر التصحيحات من كتالوج Microsoft Update لجميع إصدارات Windows المتأثرة
2. التحقق من نشر التصحيح باستخدام WSUS أو SCCM أو أدوات إدارة التصحيح المعادلة
3. تأكيد تثبيت التصحيح بالتحقق من وجود KB4530734 في التحديثات المثبتة

ضوابط التعويض (في حالة تأخر التصحيح):
1. تقييد حقوق تسجيل الدخول المحلي لتقليل سطح الهجوم وتطبيق مبدأ الحد الأدنى من الامتيازات
2. نشر قائمة السماح بالتطبيقات لمنع تنفيذ حمولات الاستغلال
3. تفعيل Windows Defender Credential Guard للحد من تأثير ما بعد الاستغلال
4. مراقبة استدعاءات Win32k API المشبوهة ونشاط وضع النواة

قواعد الكشف:
1. مراقبة إنشاء العمليات غير المتوقعة بمستوى SYSTEM من العمليات في وضع المستخدم
2. التنبيه على تعطل Win32k.sys أو سجلات استثناءات النواة
3. نشر قواعد Sigma للكشف عن العمليات التي تُنشئ cmd.exe أو powershell.exe بامتيازات SYSTEM
4. تفعيل Sysmon ومراقبة أنماط رفع الامتيازات
5. مراجعة معرف حدث Windows 4672 للإدخالات الشاذة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC-1-4-2: Patch and vulnerability management ECC-2-3-1: Protection of operating systems ECC-2-3-3: Endpoint security controls ECC-1-3-6: Cybersecurity incident management ECC-2-2-1: Access control and privilege management
🔵 SAMA CSF
3.3.3 Vulnerability Management 3.3.5 Patch Management 3.4.2 Endpoint Security 3.2.1 Access Control Management 3.6.1 Cybersecurity Incident Management
🟡 ISO 27001:2022
A.8.8 Management of technical vulnerabilities A.8.7 Protection against malware A.8.15 Logging A.5.15 Access control A.8.9 Configuration management
🟣 PCI DSS v4.0
Requirement 6.3.3: All system components are protected from known vulnerabilities by installing applicable security patches Requirement 7.2: Access to system components is appropriately defined and assigned Requirement 10.2: Audit logs capture all individual user access to cardholder data
🔗 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
EPSS91.94%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2022-07-10
Published 2022-01-10
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
9.4
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited ransomware
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