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Vulnerabilities

CVE-2015-2419

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Microsoft Internet Explorer Memory Corruption Vulnerability — JScript in Microsoft Internet Explorer allows remote attackers to execute remote code or cause a denial of service (memory corruption) via
Published: Mar 28, 2022  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Microsoft Internet Explorer Memory Corruption Vulnerability — JScript in Microsoft Internet Explorer allows remote attackers to execute remote code or cause a denial of service (memory corruption) via a crafted web site.

🤖 AI Executive Summary

CVE-2015-2419 is a critical memory corruption vulnerability in Microsoft Internet Explorer's JScript engine that allows remote code execution through malicious websites. With a CVSS score of 9.0 and publicly available exploits, this poses an immediate threat to organizations still using legacy IE versions. Patching is essential as this vulnerability has been actively exploited in the wild.

📄 Description (Arabic)

ثغرة حرجة في تلف الذاكرة في Microsoft Internet Explorer تتعلق بمحرك JScript. يمكن للمهاجمين البعيدين استغلال هذه الثغرة من خلال إنشاء موقع ويب ضار لتنفيذ كود بعيد على أجهزة الضحايا أو التسبب في رفض الخدمة عن طريق إفساد الذاكرة.

🤖 ملخص تنفيذي (AI)

تسمح ثغرة في JScript في Microsoft Internet Explorer للمهاجمين البعيدين بتنفيذ كود بعيد أو التسبب في رفض الخدمة من خلال موقع ويب مصمم بشكل خاص

🤖 AI Intelligence Analysis Analyzed: Mar 30, 2026 20:28
🇸🇦 Saudi Arabia Impact Assessment
Saudi banking sector (SAMA-regulated institutions) and government agencies (NCA oversight) face significant risk if employees use legacy IE for internal applications or banking portals. Telecom operators (STC, Mobily) and energy sector (ARAMCO) may have legacy systems dependent on IE. Healthcare organizations using older clinical systems could be compromised. The vulnerability is particularly dangerous in Saudi Arabia where some government and financial institutions maintain legacy infrastructure for compliance or operational reasons.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare Energy and Utilities Telecommunications Education Retail and E-commerce
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all systems running Internet Explorer versions affected by CVE-2015-2419 (IE 6-11 depending on OS)
2. Disable JScript execution in IE security zones if IE cannot be immediately replaced
3. Block access to untrusted websites via web filtering and proxy controls
4. Implement network segmentation to isolate legacy IE systems

PATCHING:
1. Apply Microsoft security updates immediately (MS15-018 or later)
2. Upgrade to Internet Explorer 11 or migrate to modern browsers (Edge, Chrome, Firefox)
3. For Windows XP/Vista systems: prioritize replacement or air-gap isolation

COMPENSATING CONTROLS:
1. Deploy web application firewalls (WAF) to detect malicious JavaScript payloads
2. Implement Content Security Policy (CSP) headers on internal applications
3. Use browser isolation technology for high-risk users
4. Enable Enhanced Protected Mode in IE 10+
5. Configure Group Policy to restrict script execution

DETECTION:
1. Monitor for suspicious memory access patterns and process crashes in iexplore.exe
2. Alert on execution of unsigned scripts or abnormal JScript behavior
3. Track failed IE security zone validations
4. Monitor for exploitation attempts via IDS/IPS signatures for CVE-2015-2419
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تعمل بإصدارات Internet Explorer المتأثرة (IE 6-11 حسب نظام التشغيل)
2. تعطيل تنفيذ JScript في مناطق أمان IE إذا لم يتمكن من استبدال IE فوراً
3. حظر الوصول إلى المواقع غير الموثوقة عبر تصفية الويب والتحكم بالوكيل
4. تطبيق تقسيم الشبكة لعزل أنظمة IE القديمة

التصحيح:
1. تطبيق تحديثات أمان Microsoft فوراً (MS15-018 أو أحدث)
2. الترقية إلى Internet Explorer 11 أو الهجرة إلى متصفحات حديثة (Edge, Chrome, Firefox)
3. لأنظمة Windows XP/Vista: إعطاء الأولوية للاستبدال أو العزل

الضوابط البديلة:
1. نشر جدران حماية تطبيقات الويب (WAF) للكشف عن حمولات JavaScript الضارة
2. تطبيق رؤوس سياسة أمان المحتوى (CSP) على التطبيقات الداخلية
3. استخدام تكنولوجيا عزل المتصفح للمستخدمين عالي الخطورة
4. تفعيل الوضع المحمي المحسّن في IE 10+
5. تكوين Group Policy لتقييد تنفيذ البرامج النصية

الكشف:
1. مراقبة أنماط الوصول إلى الذاكرة المريبة وأعطال العمليات في iexplore.exe
2. التنبيه على تنفيذ البرامج النصية غير الموقعة أو سلوك JScript غير الطبيعي
3. تتبع فشل التحقق من منطقة أمان IE
4. مراقبة محاولات الاستغلال عبر توقيعات IDS/IPS لـ CVE-2015-2419
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies and Procedures A.6.2.1 - Access Control and User Management A.8.1.1 - Asset Management and Inventory A.12.2.1 - Change Management A.12.6.1 - Management of Technical Vulnerabilities
🔵 SAMA CSF
ID.RA-1 - Asset Management PR.IP-12 - Software, Firmware, and Information Updates DE.CM-8 - Vulnerability Scans RS.MI-2 - Incident Response and Management
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy A.12.2.1 - Change management procedures A.8.1.1 - Asset inventory and responsibility
🟣 PCI DSS v4.0
6.2 - Security patches and updates 6.5.1 - Injection flaws prevention 11.2 - Vulnerability scanning
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Microsoft:Internet Explorer
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS80.25%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2022-04-18
Published 2022-03-28
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
8.5
/ 10.0 — Saudi Risk
🏷️ Tags
kev actively-exploited
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