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Vulnerabilities

CVE-2020-27930

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

Apple Multiple Products Memory Corruption Vulnerability — Apple iOS, iPadOS, macOS, and watchOS FontParser contain a memory corruption vulnerability which may allow for code execution when processing maliciously crafted front.

🤖 AI Executive Summary

A critical memory corruption vulnerability in Apple's FontParser component affects iOS, iPadOS, macOS, and watchOS, allowing remote code execution through maliciously crafted fonts. With a CVSS score of 9.0 and publicly available exploits, this poses an immediate threat to Saudi organizations relying on Apple devices. Immediate patching is essential across all affected Apple platforms.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 19, 2026 07:33
🇸🇦 Saudi Arabia Impact Assessment
High impact on Saudi banking sector (SAMA-regulated institutions using Apple devices for executive operations), government agencies (NCA, Ministry of Interior), healthcare organizations (MOH facilities), and telecommunications companies (STC, Mobily). Enterprise users across financial services, oil & gas, and critical infrastructure sectors face significant risk from remote code execution via email attachments, web content, or document sharing platforms commonly used in Saudi organizations.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare Energy and Oil & Gas Telecommunications Education Retail and E-commerce
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Apple devices (iPhones, iPads, Macs, Apple Watches) in your organization
2. Disable font rendering from untrusted sources until patching is complete
3. Block suspicious email attachments containing font files (.ttf, .otf, .dfont)
4. Alert users not to open documents with embedded fonts from unknown sources

PATCHING GUIDANCE:
1. Update iOS to latest version (iOS 14.3 or later)
2. Update iPadOS to latest version (iPadOS 14.3 or later)
3. Update macOS to latest version (Big Sur 11.2 or later)
4. Update watchOS to latest version (watchOS 7.2 or later)
5. Enable automatic updates where possible

COMPENSATING CONTROLS:
1. Implement application whitelisting on macOS devices
2. Deploy Mobile Device Management (MDM) to enforce OS updates
3. Monitor for suspicious font file access in system logs
4. Restrict document preview functionality in email clients
5. Use network segmentation to limit lateral movement if compromise occurs

DETECTION RULES:
1. Monitor for unusual font file processing (fontd process anomalies)
2. Alert on unexpected code execution from font rendering processes
3. Track failed font parsing attempts in system logs
4. Monitor for suspicious memory access patterns in FontParser
5. Implement EDR solutions to detect post-exploitation behavior
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Apple (iPhones و iPads و Macs و Apple Watches) في المنظمة
2. تعطيل عرض الخطوط من مصادر غير موثوقة حتى يتم التصحيح
3. حظر مرفقات البريد الإلكتروني المريبة التي تحتوي على ملفات خطوط
4. تنبيه المستخدمين بعدم فتح المستندات التي تحتوي على خطوط مدمجة من مصادر غير معروفة

إرشادات التصحيح:
1. تحديث iOS إلى أحدث إصدار (iOS 14.3 أو أحدث)
2. تحديث iPadOS إلى أحدث إصدار (iPadOS 14.3 أو أحدث)
3. تحديث macOS إلى أحدث إصدار (Big Sur 11.2 أو أحدث)
4. تحديث watchOS إلى أحدث إصدار (watchOS 7.2 أو أحدث)
5. تفعيل التحديثات التلقائية حيث أمكن

الضوابط البديلة:
1. تطبيق قائمة التطبيقات المسموحة على أجهزة macOS
2. نشر إدارة الأجهزة المحمولة (MDM) لفرض تحديثات نظام التشغيل
3. مراقبة الوصول المريب لملفات الخطوط في سجلات النظام
4. تقييد وظيفة معاينة المستندات في عملاء البريد الإلكتروني
5. استخدام تقسيم الشبكة لتحديد الحركة الجانبية في حالة الاختراق

قواعد الكشف:
1. مراقبة معالجة ملفات الخطوط غير العادية (شذوذ عملية fontd)
2. تنبيهات تنفيذ الأكواد غير المتوقعة من عمليات عرض الخطوط
3. تتبع محاولات تحليل الخطوط الفاشلة في سجلات النظام
4. مراقبة أنماط الوصول إلى الذاكرة المريبة في FontParser
5. تطبيق حلول EDR للكشف عن السلوك بعد الاستغلال
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Information Security Policies and Procedures ECC 2024 A.6.1.1 - Access Control and Authentication ECC 2024 A.12.2.1 - Change Management ECC 2024 A.12.6.1 - Management of Technical Vulnerabilities
🔵 SAMA CSF
SAMA CSF ID.BE-1 - Business Environment SAMA CSF PR.IP-12 - Information and Communications Technology (ICT) Security SAMA CSF DE.CM-1 - Detection Processes SAMA CSF RS.MI-1 - Incident Response Planning
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for Information Security ISO 27001:2022 A.8.1 - User Endpoint Devices ISO 27001:2022 A.8.2 - Privileged Access Rights ISO 27001:2022 A.12.6 - Management of Technical Vulnerabilities and Exposures
🟣 PCI DSS v4.0
PCI DSS 6.2 - Security Patches and Updates PCI DSS 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
EPSS47.17%
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
9.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
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