📄 Description (English)
Mozilla Firefox and Thunderbird Type Confusion Vulnerability — Mozilla Firefox and Thunderbird contain a type confusion vulnerability that can occur when manipulating JavaScript objects due to issues in Array.pop, allowing for an exploitable crash.
🤖 AI Executive Summary
CVE-2019-11707 is a critical type confusion vulnerability in Mozilla Firefox and Thunderbird affecting JavaScript engine handling of Array.pop operations. An attacker can exploit this flaw to cause an exploitable crash, potentially leading to arbitrary code execution in the context of the browser or email client. This vulnerability has a known public exploit and has been actively used in the wild, making it a high-priority remediation target. Organizations running unpatched versions of Firefox or Thunderbird are at immediate risk of remote compromise.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 13, 2026 17:01
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk across multiple Saudi sectors. Government entities under NCA oversight using Firefox as a standard browser are at high risk of targeted spear-phishing campaigns delivering malicious JavaScript payloads. Banking and financial institutions regulated by SAMA could face credential theft and lateral movement if endpoint browsers are unpatched. Energy sector organizations including Saudi Aramco and NEOM-related infrastructure using Thunderbird for email communications are vulnerable to drive-by download attacks. Healthcare organizations and telecom providers such as STC may face data exfiltration through compromised browser sessions. Given the active exploit availability and Saudi Arabia's elevated threat landscape from state-sponsored actors, this vulnerability is particularly dangerous for critical national infrastructure operators.
🏢 Affected Saudi Sectors
Government
Banking
Energy
Healthcare
Telecom
Education
Defense
Critical Infrastructure
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all systems running Mozilla Firefox versions below 67.0.3 and Thunderbird versions below 60.7.2 using asset inventory tools.
2. Isolate or restrict internet access for critical systems until patching is complete.
3. Block known malicious domains and IPs associated with CVE-2019-11707 exploitation campaigns at perimeter firewalls and proxies.
PATCHING GUIDANCE:
1. Update Mozilla Firefox to version 67.0.3 or later immediately.
2. Update Mozilla Firefox ESR to version 60.7.1 or later.
3. Update Thunderbird to version 60.7.2 or later.
4. Use centralized patch management tools (SCCM, Ansible, or equivalent) to enforce updates across all endpoints.
5. Verify patch deployment through vulnerability scanning tools (Nessus, Qualys).
COMPENSATING CONTROLS (if patching is delayed):
1. Disable JavaScript execution in Firefox via about:config (javascript.enabled = false) — note this will break most web functionality.
2. Deploy web application firewall rules to detect and block malicious Array.pop exploitation patterns.
3. Enable Enhanced Tracking Protection in Firefox to reduce attack surface.
4. Consider deploying browser isolation solutions (e.g., Menlo Security, Symantec Web Isolation).
5. Restrict Thunderbird from rendering HTML emails to plain text only.
DETECTION RULES:
1. Monitor endpoint detection tools for suspicious Firefox/Thunderbird child process spawning.
2. Create SIEM alerts for unusual JavaScript engine crashes (crash reports in %APPDATA%\Mozilla).
3. Deploy Snort/Suricata rules targeting CVE-2019-11707 exploit signatures.
4. Monitor for PowerShell or cmd.exe spawned from Firefox/Thunderbird processes as indicators of successful exploitation.
5. Enable and review browser crash telemetry across the enterprise.
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تشغّل Mozilla Firefox بإصدارات أقل من 67.0.3 وThunderbird بإصدارات أقل من 60.7.2 باستخدام أدوات جرد الأصول.
2. عزل الأنظمة الحرجة أو تقييد وصولها إلى الإنترنت حتى اكتمال التصحيح.
3. حظر النطاقات والعناوين IP الضارة المرتبطة بحملات استغلال CVE-2019-11707 على جدران الحماية والبروكسي.
إرشادات التصحيح:
1. تحديث Mozilla Firefox إلى الإصدار 67.0.3 أو أحدث فوراً.
2. تحديث Mozilla Firefox ESR إلى الإصدار 60.7.1 أو أحدث.
3. تحديث Thunderbird إلى الإصدار 60.7.2 أو أحدث.
4. استخدام أدوات إدارة التصحيح المركزية لفرض التحديثات على جميع نقاط النهاية.
5. التحقق من نشر التصحيح عبر أدوات فحص الثغرات.
ضوابط التعويض (في حال تأخر التصحيح):
1. تعطيل تنفيذ JavaScript في Firefox عبر about:config.
2. نشر قواعد جدار حماية تطبيقات الويب لاكتشاف وحظر أنماط استغلال Array.pop الضارة.
3. تفعيل الحماية المحسّنة من التتبع في Firefox لتقليل سطح الهجوم.
4. النظر في نشر حلول عزل المتصفح.
5. تقييد Thunderbird لعرض رسائل HTML كنص عادي فقط.
قواعد الكشف:
1. مراقبة أدوات الكشف على نقاط النهاية للعمليات الفرعية المشبوهة الناتجة عن Firefox/Thunderbird.
2. إنشاء تنبيهات SIEM لأعطال محرك JavaScript غير المعتادة.
3. نشر قواعد Snort/Suricata لاستهداف توقيعات استغلال CVE-2019-11707.
4. مراقبة PowerShell أو cmd.exe المُشغَّلة من عمليات Firefox/Thunderbird كمؤشرات على نجاح الاستغلال.
5. تفعيل ومراجعة بيانات تعطل المتصفح عبر المؤسسة.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC-1-4-2: Patch and vulnerability management for endpoint systems
ECC-2-3-1: Endpoint protection and hardening requirements
ECC-2-5-1: Secure configuration management for workstations
ECC-3-3-2: Security monitoring and incident detection
ECC-1-3-1: Asset management and software inventory
🔵 SAMA CSF
3.3.6 - Vulnerability Management: Timely patching of critical vulnerabilities
3.3.7 - Patch Management: Enforcement of patch deployment timelines
3.4.2 - Endpoint Security: Browser and email client hardening
3.2.5 - Threat Intelligence: Monitoring for active exploit campaigns
3.6.1 - Incident Management: Response to active exploitation attempts
🟡 ISO 27001:2022
A.8.8 - Management of technical vulnerabilities
A.8.7 - Protection against malware
A.8.19 - Installation of software on operational systems
A.8.20 - Networks security and browser controls
A.5.25 - Assessment and decision on information security events
🟣 PCI DSS v4.0
Requirement 6.3.3 - All system components are protected from known vulnerabilities by installing applicable security patches
Requirement 6.2.4 - Software development practices to prevent common vulnerabilities
Requirement 5.2.1 - Anti-malware solution deployment on applicable systems
Requirement 12.3.2 - Targeted risk analysis for vulnerability management
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Mozilla:Firefox and Thunderbird