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Vulnerabilities

CVE-2019-1385

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Windows AppX Deployment Extensions Privilege Escalation (CVE-2019-1385)
Published: May 23, 2022  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Microsoft Windows AppX Deployment Extensions Privilege Escalation Vulnerability — A privilege escalation vulnerability exists when the Windows AppX Deployment Extensions improperly performs privilege management, resulting in access to system files.

🤖 AI Executive Summary

CVE-2019-1385 is a critical privilege escalation vulnerability in Microsoft Windows AppX Deployment Extensions that allows attackers to improperly gain elevated privileges and access sensitive system files. With a CVSS score of 9.0 and a confirmed public exploit available, this vulnerability poses an immediate and severe threat to Windows environments. An attacker who successfully exploits this flaw could gain SYSTEM-level access, enabling full compromise of the affected machine. The availability of both an exploit and a patch makes immediate remediation a top priority for all Windows-based organizations.

📄 Description (Arabic)

تتعلق هذه الثغرة بعيب في آلية إدارة الامتيازات ضمن مكون امتدادات نشر AppX في نظام Windows، مما يسمح لمستخدم محلي بتصعيد امتيازاته للحصول على وصول كامل للنظام. يمكن للمهاجم استغلال هذا الضعف للوصول إلى ملفات النظام الحساسة وتعديلها. تم تأكيد استغلال هذه الثغرة في بيئات الإنتاج الفعلية. الثغرة تؤثر على إصدارات متعددة من Windows وتتطلب تطبيق التصحيحات الأمنية الفورية.

🤖 ملخص تنفيذي (AI)

CVE-2019-1385 هي ثغرة أمنية حرجة في مكوّن AppX Deployment Extensions بنظام Microsoft Windows تتيح للمهاجمين رفع صلاحياتهم بشكل غير مشروع والوصول إلى ملفات النظام الحساسة. بدرجة CVSS تبلغ 9.0 ووجود استغلال عام متاح، تشكّل هذه الثغرة تهديداً فورياً وخطيراً على بيئات Windows. يمكن للمهاجم الذي ينجح في استغلال هذه الثغرة الحصول على صلاحيات SYSTEM والسيطرة الكاملة على الجهاز المستهدف. إن توافر كل من الاستغلال والتصحيح يجعل المعالجة الفورية أولوية قصوى لجميع المؤسسات التي تعتمد على أنظمة Windows.

🤖 AI Intelligence Analysis Analyzed: Apr 14, 2026 06:32
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability critically impacts Saudi organizations across all sectors that rely on Windows infrastructure. Banking and financial institutions regulated by SAMA are at high risk as attackers could escalate privileges to exfiltrate sensitive financial data or disrupt core banking systems. Government entities under NCA oversight running Windows environments face potential full system compromise. Saudi Aramco and energy sector organizations with Windows-based SCADA or operational technology interfaces are particularly vulnerable given the potential for lateral movement post-exploitation. Telecom providers such as STC and Zain KSA with large Windows server estates face significant exposure. Healthcare organizations managing patient data on Windows systems are also at elevated risk. Given the public exploit availability, threat actors including APT groups known to target Saudi infrastructure (e.g., APT33/OilRig) could weaponize this vulnerability for targeted intrusions.
🏢 Affected Saudi Sectors
Banking Government Energy Telecom Healthcare Defense Education Retail
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Apply Microsoft Security Update KB4525241 (November 2019 Patch Tuesday) immediately across all affected Windows systems.
2. Prioritize patching of internet-facing systems, domain controllers, and critical infrastructure servers first.
3. Audit all Windows systems for signs of exploitation — review event logs for unusual privilege escalation events (Event IDs 4672, 4673, 4674).

PATCHING GUIDANCE:
1. Download and deploy the official Microsoft patch from the Microsoft Update Catalog.
2. Use WSUS or SCCM/MECM to push patches across enterprise environments at scale.
3. Verify patch deployment using vulnerability scanners (Tenable Nessus, Qualys) post-patching.

COMPENSATING CONTROLS (if patching is delayed):
1. Restrict local user accounts and enforce least-privilege principles — remove unnecessary local admin rights.
2. Enable Windows Defender Credential Guard and AppLocker to limit AppX-related abuse.
3. Monitor and restrict execution of unsigned or untrusted AppX packages via Group Policy.
4. Deploy application whitelisting to prevent unauthorized AppX deployments.
5. Isolate critical systems from general user networks using network segmentation.

DETECTION RULES:
1. Monitor for anomalous AppX Deployment Service (AppXSvc) activity in Windows Event Logs.
2. Create SIEM alerts for Event ID 4688 (process creation) involving AppXSvc with elevated tokens.
3. Deploy EDR rules to detect privilege escalation patterns associated with AppX Deployment Extensions.
4. Hunt for unexpected SYSTEM-level processes spawned from user-context AppX operations.
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تطبيق تحديث Microsoft الأمني KB4525241 (تحديث نوفمبر 2019) فوراً على جميع أنظمة Windows المتأثرة.
2. إعطاء الأولوية لتصحيح الأنظمة المكشوفة على الإنترنت ووحدات التحكم بالنطاق والخوادم الحيوية أولاً.
3. مراجعة سجلات الأحداث للكشف عن أي علامات استغلال، مع التركيز على معرّفات الأحداث 4672 و4673 و4674.

إرشادات التصحيح:
1. تنزيل التصحيح الرسمي من Microsoft Update Catalog ونشره على جميع الأنظمة.
2. استخدام WSUS أو SCCM/MECM لنشر التصحيحات على نطاق واسع في البيئات المؤسسية.
3. التحقق من نجاح نشر التصحيح باستخدام أدوات فحص الثغرات مثل Nessus أو Qualys.

ضوابط التعويض (في حال تأخر التصحيح):
1. تقييد حسابات المستخدمين المحليين وتطبيق مبدأ الصلاحيات الدنيا وإزالة حقوق المسؤول المحلي غير الضرورية.
2. تفعيل Windows Defender Credential Guard وAppLocker للحد من إساءة استخدام AppX.
3. مراقبة وتقييد تنفيذ حزم AppX غير الموقّعة أو غير الموثوقة عبر Group Policy.
4. نشر قوائم التطبيقات المسموح بها لمنع عمليات نشر AppX غير المصرح بها.
5. عزل الأنظمة الحيوية عن شبكات المستخدمين العامة باستخدام تجزئة الشبكة.

قواعد الكشف:
1. مراقبة نشاط خدمة AppX Deployment (AppXSvc) غير الطبيعي في سجلات أحداث Windows.
2. إنشاء تنبيهات SIEM لمعرّف الحدث 4688 المتعلق بـ AppXSvc مع رموز مميزة مرفوعة الصلاحيات.
3. نشر قواعد EDR للكشف عن أنماط رفع الصلاحيات المرتبطة بـ AppX Deployment Extensions.
4. البحث عن عمليات غير متوقعة بصلاحيات SYSTEM ناتجة عن عمليات AppX في سياق المستخدم.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC-1-4-2: Vulnerability Management — Timely patching of critical vulnerabilities ECC-2-3-1: Access Control — Least privilege enforcement ECC-2-5-1: System and Application Security — Secure configuration of operating systems ECC-3-3-2: Patch Management — Critical patch deployment within defined SLAs ECC-2-6-1: Monitoring and Logging — Detection of privilege escalation events
🔵 SAMA CSF
3.3.6 Vulnerability Management — Identification and remediation of critical vulnerabilities 3.3.2 Access Control Management — Enforcement of least privilege 3.3.9 Patch Management — Timely application of security patches 3.3.11 Security Monitoring — Detection of anomalous privilege escalation activity 3.3.5 Endpoint Security — Hardening of Windows endpoints
🟡 ISO 27001:2022
A.8.8 Management of technical vulnerabilities — Timely patching A.8.2 Privileged access rights — Least privilege and access control A.8.9 Configuration management — Secure system configurations A.8.16 Monitoring activities — Detection of security events A.5.37 Documented operating procedures — Patch management procedures
🟣 PCI DSS v4.0
Requirement 6.3.3 — All system components protected from known vulnerabilities by installing applicable security patches Requirement 7.2 — Access to system components and data is appropriately defined and assigned Requirement 10.2 — Audit logs capture privilege escalation events Requirement 11.3 — External and internal 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
EPSS0.38%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2022-06-13
Published 2022-05-23
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
9.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited ransomware
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