📄 Description (English)
Microsoft Office Use-After-Free Vulnerability — Microsoft Office contains a use-after-free vulnerability which can allow for remote code execution.
🤖 AI Executive Summary
CVE-2017-0261 is a critical use-after-free vulnerability in Microsoft Office that allows remote code execution when a user opens a specially crafted EPS (Encapsulated PostScript) file. This vulnerability has been actively exploited in the wild by multiple threat actors, including nation-state groups, and has a CVSS score of 9.0. The exploit is publicly available and has been used in targeted spear-phishing campaigns. Immediate patching is essential as this vulnerability provides full system compromise capabilities.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 7, 2026 09:01
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses a severe risk to Saudi organizations across all sectors due to the widespread use of Microsoft Office. Government entities regulated by NCA, banking institutions under SAMA oversight, Saudi Aramco and energy sector companies, STC and telecom providers, and healthcare organizations are all at significant risk. Saudi organizations are frequent targets of spear-phishing campaigns, and this vulnerability's exploitation via malicious Office documents makes it particularly dangerous. The energy and government sectors in Saudi Arabia have historically been targeted by APT groups known to exploit such vulnerabilities (e.g., APT28, Turla). The prevalence of Microsoft Office in Saudi enterprise environments amplifies the attack surface considerably.
🏢 Affected Saudi Sectors
Government
Banking
Energy
Telecom
Healthcare
Defense
Education
Retail
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Apply Microsoft security update MS17-014 and the May 2017 security updates immediately across all systems running Microsoft Office.
2. Disable EPS rendering in Microsoft Office by setting the registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Common\Security\DisableEPSRendering to 1 (DWORD).
3. Block EPS file attachments at email gateways and web proxies.
Patching Guidance:
- Ensure all Microsoft Office versions (2007, 2010, 2013, 2016) are updated to the latest security patches.
- Prioritize patching on systems used by executives and high-value targets who are more likely to receive spear-phishing emails.
Compensating Controls:
- Enable Attack Surface Reduction (ASR) rules in Microsoft Defender to block Office applications from creating child processes.
- Implement application whitelisting to prevent unauthorized code execution.
- Deploy endpoint detection and response (EDR) solutions with behavioral analysis capabilities.
Detection Rules:
- Monitor for Office processes spawning suspicious child processes (cmd.exe, powershell.exe, wscript.exe).
- Create YARA rules for EPS-based exploit payloads.
- Alert on registry modifications related to EPS rendering settings.
- Monitor for unusual memory allocation patterns in Office processes.
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تطبيق تحديث الأمان من Microsoft MS17-014 وتحديثات الأمان لشهر مايو 2017 فوراً على جميع الأنظمة التي تعمل بـ Microsoft Office.
2. تعطيل عرض EPS في Microsoft Office عن طريق تعيين مفتاح السجل: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Common\Security\DisableEPSRendering إلى القيمة 1 (DWORD).
3. حظر مرفقات ملفات EPS على بوابات البريد الإلكتروني وخوادم الوكيل.
إرشادات التصحيح:
- التأكد من تحديث جميع إصدارات Microsoft Office (2007، 2010، 2013، 2016) بأحدث تصحيحات الأمان.
- إعطاء الأولوية للتصحيح على الأنظمة المستخدمة من قبل المديرين التنفيذيين والأهداف عالية القيمة.
الضوابط التعويضية:
- تفعيل قواعد تقليل سطح الهجوم (ASR) في Microsoft Defender لمنع تطبيقات Office من إنشاء عمليات فرعية.
- تنفيذ القوائم البيضاء للتطبيقات لمنع تنفيذ التعليمات البرمجية غير المصرح بها.
- نشر حلول الكشف والاستجابة لنقاط النهاية (EDR) مع إمكانيات التحليل السلوكي.
قواعد الكشف:
- مراقبة عمليات Office التي تنشئ عمليات فرعية مشبوهة.
- إنشاء قواعد YARA لحمولات الاستغلال المستندة إلى EPS.
- التنبيه على تعديلات السجل المتعلقة بإعدادات عرض EPS.
- مراقبة أنماط تخصيص الذاكرة غير العادية في عمليات Office.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
2-3-1 (Patch Management)
2-5-1 (Malware Protection)
2-6-1 (Email Security)
2-2-1 (Asset Management)
2-9-1 (Vulnerability Management)
🔵 SAMA CSF
3.3.3 (Patch Management)
3.3.5 (Malware Protection)
3.3.7 (Email and Messaging Security)
3.4.1 (Vulnerability Management)
3.3.4 (Endpoint Security)
🟡 ISO 27001:2022
A.8.8 (Management of technical vulnerabilities)
A.8.7 (Protection against malware)
A.8.23 (Web filtering)
A.5.7 (Threat intelligence)
🟣 PCI DSS v4.0
6.3.3 (Install critical security patches within one month)
5.2 (Deploy anti-malware mechanisms)
11.3 (Penetration testing)
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Microsoft:Office