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Vulnerabilities

CVE-2020-9819

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability — Apple iOS, iPadOS, and watchOS Mail contains a memory corruption vulnerability that may allow heap corruption when processing a malicio
Published: Nov 3, 2021  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability — Apple iOS, iPadOS, and watchOS Mail contains a memory corruption vulnerability that may allow heap corruption when processing a maliciously crafted mail message.

🤖 AI Executive Summary

CVE-2020-9819 is a critical memory corruption vulnerability in Apple Mail affecting iOS, iPadOS, and watchOS with a CVSS score of 9.0. An attacker can trigger heap corruption by sending a maliciously crafted email, potentially leading to arbitrary code execution. This vulnerability poses significant risk to Saudi users and organizations relying on Apple devices for business communications.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 19, 2026 18:32
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability directly impacts Saudi banking sector (SAMA-regulated institutions), government agencies (NCA, NCSC), healthcare organizations, and energy sector (ARAMCO) personnel using Apple devices for business email. The heap corruption vulnerability could enable remote code execution, allowing attackers to steal sensitive financial data, government communications, or critical infrastructure information. Telecom operators (STC, Mobily, Zain) and their enterprise customers are also at significant risk.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare Energy and Utilities Telecommunications Defense and Security
⚖️ Saudi Risk Score (AI)
8.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all Apple devices (iPhone, iPad, Apple Watch) in your organization running affected iOS/iPadOS/watchOS versions
2. Disable Mail app on non-critical devices until patching is complete
3. Advise users to avoid opening suspicious emails from unknown senders
4. Monitor email gateways for malicious mail patterns

Patching Guidance:
1. Update to iOS 13.5.1 or later, iPadOS 13.5.1 or later, or watchOS 6.2.5 or later
2. Enable automatic updates in Settings > General > Software Update > Automatic Updates
3. Prioritize patching for devices accessing sensitive financial/government systems
4. Test patches in non-production environment first

Compensating Controls:
1. Implement email filtering to block suspicious attachments and malformed messages
2. Deploy Mobile Device Management (MDM) to enforce security policies
3. Use network segmentation to isolate Apple devices from critical systems
4. Enable two-factor authentication on all email accounts

Detection Rules:
1. Monitor for unexpected process execution from Mail app
2. Alert on unusual memory access patterns or heap corruption indicators
3. Track failed Mail app operations or crashes
4. Monitor for suspicious network connections initiated by Mail process
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Apple (iPhone و iPad و Apple Watch) في مؤسستك التي تعمل بإصدارات iOS/iPadOS/watchOS المتأثرة
2. تعطيل تطبيق البريد على الأجهزة غير الحرجة حتى اكتمال التصحيح
3. نصح المستخدمين بتجنب فتح رسائل بريد مريبة من مرسلين غير معروفين
4. مراقبة بوابات البريد الإلكتروني للكشف عن أنماط البريد الضارة

إرشادات التصحيح:
1. التحديث إلى iOS 13.5.1 أو أحدث، iPadOS 13.5.1 أو أحدث، أو watchOS 6.2.5 أو أحدث
2. تفعيل التحديثات التلقائية في الإعدادات > عام > تحديث البرنامج > التحديثات التلقائية
3. أولويات التصحيح للأجهزة التي تصل إلى الأنظمة المالية/الحكومية الحساسة
4. اختبار التصحيحات في بيئة غير الإنتاج أولاً

الضوابط البديلة:
1. تنفيذ تصفية البريد الإلكتروني لحجب المرفقات المريبة والرسائل المشوهة
2. نشر إدارة الأجهزة المحمولة (MDM) لفرض سياسات الأمان
3. استخدام تقسيم الشبكة لعزل أجهزة Apple عن الأنظمة الحرجة
4. تفعيل المصادقة الثنائية على جميع حسابات البريد الإلكتروني

قواعد الكشف:
1. مراقبة تنفيذ العمليات غير المتوقعة من تطبيق البريد
2. التنبيه على أنماط الوصول إلى الذاكرة غير العادية أو مؤشرات تلف الكومة
3. تتبع عمليات البريد الفاشلة أو أعطال التطبيق
4. مراقبة الاتصالات الشبكية المريبة التي يبدأها عملية البريد
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies and Procedures A.6.1.1 - Internal Organization A.12.2.1 - Controls Against Malware A.12.6.1 - Management of Technical Vulnerabilities
🔵 SAMA CSF
ID.RA-1 - Asset Management PR.DS-1 - Data Security Management PR.IP-12 - Security Patch Management DE.CM-8 - Vulnerability Scans
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy A.12.2.1 - Restrictions on software installation A.18.2.3 - Compliance with security policies and standards
🟣 PCI DSS v4.0
6.2 - Ensure security patches are installed 11.2 - Run automated vulnerability scans
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Apple:iOS, iPadOS, and watchOS
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS0.20%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2022-05-03
Published 2021-11-03
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
8.8
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
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