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Vulnerabilities

CVE-2021-30665

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Apple Multiple Products WebKit Memory Corruption Vulnerability — Apple iOS, iPadOS, macOS, watchOS, and tvOS WebKit contain a memory corruption vulnerability that leads to code execution when processi
Published: Nov 3, 2021  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Apple Multiple Products WebKit Memory Corruption Vulnerability — Apple iOS, iPadOS, macOS, watchOS, and tvOS WebKit contain a memory corruption vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

🤖 AI Executive Summary

CVE-2021-30665 is a critical memory corruption vulnerability in WebKit affecting Apple's iOS, iPadOS, macOS, watchOS, and tvOS platforms with a CVSS score of 9.0. Exploitation requires processing maliciously crafted web content and can lead to arbitrary code execution. An exploit is publicly available, making this an immediate threat to Saudi organizations and individuals using Apple devices for business and personal use.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 20, 2026 13:18
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA, NCSC), healthcare organizations, and energy sector (ARAMCO, SEC) personnel using Apple devices for business communications and transactions. Telecom operators (STC, Mobily, Zain) are at risk as their infrastructure may process web content. The widespread use of iPhones and iPads in Saudi Arabia's business ecosystem makes this a critical threat affecting confidentiality, integrity, and availability of sensitive organizational data.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare and Medical Services Energy and Utilities Telecommunications Defense and Security Education Retail and E-commerce
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Apple devices (iOS, iPadOS, macOS, watchOS, tvOS) in your organization's inventory
2. Restrict access to untrusted websites and disable automatic content loading until patching is complete
3. Disable JavaScript in Safari and third-party browsers where possible
4. Implement network-level controls to block malicious domains

PATCHING GUIDANCE:
1. Apply security updates immediately: iOS 14.7+, iPadOS 14.7+, macOS 11.5+, watchOS 7.6+, tvOS 14.7+
2. Enable automatic security updates on all Apple devices
3. Prioritize patching for devices used in banking, government, and healthcare sectors
4. Verify patch installation through Settings > General > About (check OS version)

COMPENSATING CONTROLS (if immediate patching not possible):
1. Implement Mobile Device Management (MDM) to restrict web browsing
2. Deploy web filtering to block known malicious domains
3. Use VPN with content inspection capabilities
4. Disable WebKit-based applications until patched
5. Monitor for suspicious process execution and memory access patterns

DETECTION RULES:
1. Monitor for unexpected Safari/WebKit process crashes
2. Alert on unusual memory allocation patterns in WebKit processes
3. Track execution of code from unexpected memory regions
4. Monitor for suspicious network connections initiated from Safari
5. Log all web content processing errors and exceptions
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Apple (iOS و iPadOS و macOS و watchOS و tvOS) في مخزون المنظمة
2. تقييد الوصول إلى المواقع غير الموثوقة وتعطيل تحميل المحتوى التلقائي حتى اكتمال التصحيح
3. تعطيل JavaScript في Safari والمتصفحات الخارجية حيث أمكن
4. تنفيذ عناصر تحكم على مستوى الشبكة لحظر النطاقات الضارة

إرشادات التصحيح:
1. تطبيق تحديثات الأمان فوراً: iOS 14.7+ و iPadOS 14.7+ و macOS 11.5+ و watchOS 7.6+ و tvOS 14.7+
2. تفعيل تحديثات الأمان التلقائية على جميع أجهزة Apple
3. إعطاء الأولوية لتصحيح الأجهزة المستخدمة في قطاعات البنوك والحكومة والرعاية الصحية
4. التحقق من تثبيت التصحيح من خلال الإعدادات > عام > حول

عناصر التحكم البديلة (إذا لم يكن التصحيح الفوري ممكناً):
1. تنفيذ إدارة الأجهزة المحمولة (MDM) لتقييد تصفح الويب
2. نشر تصفية الويب لحظر النطاقات الضارة المعروفة
3. استخدام VPN مع قدرات فحص المحتوى
4. تعطيل تطبيقات WebKit حتى يتم تصحيحها
5. مراقبة أنماط تنفيذ العمليات والوصول إلى الذاكرة المريبة

قواعد الكشف:
1. مراقبة أعطال عملية Safari/WebKit غير المتوقعة
2. تنبيه على أنماط تخصيص الذاكرة غير العادية في عمليات WebKit
3. تتبع تنفيذ الكود من مناطق الذاكرة غير المتوقعة
4. مراقبة الاتصالات الشبكية المريبة التي تبدأ من Safari
5. تسجيل جميع أخطاء معالجة محتوى الويب والاستثناءات
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies and Procedures A.6.1.1 - Organization of Information Security A.8.1.1 - Asset Management A.12.2.1 - Change Management A.12.6.1 - Management of Technical Vulnerabilities
🔵 SAMA CSF
ID.RA-1 - Asset Management and Inventory PR.IP-12 - Security Patch Management DE.CM-8 - Vulnerability Scanning RS.MI-2 - Incident Response and Recovery
🟡 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.16.1.5 - Response to information security incidents
🟣 PCI DSS v4.0
6.2 - Security patches and updates 6.1 - Secure development processes 11.2 - Vulnerability scanning
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Apple:Multiple Products
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS0.65%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2021-11-17
Published 2021-11-03
Source Feed cisa_kev
Views 2
🇸🇦 Saudi Risk Score
9.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
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