📄 Description (English)
MemProcFS before 5.17 contains multiple unsafe library-loading patterns that enable DLL and shared-library hijacking across six attack surfaces, including bare-name LoadLibraryU and dlopen calls without path qualification for vmmpyc, libMSCompression, and plugin DLLs. An attacker who places a malicious DLL or shared library in the working directory or manipulates LD_LIBRARY_PATH can achieve arbitrary code execution when MemProcFS loads.
🤖 AI Executive Summary
CVE-2026-40031 is a high-severity vulnerability in MemProcFS before version 5.17 that enables arbitrary code execution through unsafe library-loading patterns across multiple attack surfaces. Attackers can exploit unqualified DLL/shared library calls to achieve code execution by placing malicious libraries in working directories or manipulating environment variables. This vulnerability poses significant risk to forensic analysis, memory acquisition, and incident response operations commonly used by Saudi security teams.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 27, 2026 14:07
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi government cybersecurity agencies (NCA, NCSC), law enforcement digital forensics units, and enterprise security operations centers (SOCs) that rely on MemProcFS for memory forensics and incident response. Banking sector (SAMA-regulated institutions) and critical infrastructure operators (ARAMCO, SEC, telecom providers) using MemProcFS for threat hunting and breach investigation are at elevated risk. The vulnerability enables privilege escalation and lateral movement when MemProcFS is executed in shared or untrusted environments, particularly concerning for cloud-based forensic analysis platforms used by Saudi organizations.
🏢 Affected Saudi Sectors
Government & Law Enforcement
Banking & Financial Services
Critical Infrastructure (Energy/Utilities)
Telecommunications
Healthcare
Cybersecurity & Incident Response
🎯 MITRE ATT&CK Techniques
T1574.001 - Hijacking Execution Flow: DLL Search Order Hijacking
T1574.006 - Hijacking Execution Flow: LD_PRELOAD
T1547.001 - Boot or Logon Initialization Scripts: Logon Script (Windows)
T1036.003 - Masquerading: Rename System Utilities
T1204.002 - User Execution: Malicious File
T1059.001 - Command and Scripting Interpreter: PowerShell
⚖️ Saudi Risk Score (AI)
7.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all MemProcFS installations across your organization using asset discovery tools
2. Restrict execution of MemProcFS to isolated, trusted environments with controlled working directories
3. Implement strict file system permissions on directories where MemProcFS operates
4. Disable or remove MemProcFS from production systems until patched
COMPENSATING CONTROLS (until patch available):
5. Execute MemProcFS only from hardened, read-only directories with explicit full paths
6. Set LD_LIBRARY_PATH to empty or explicitly defined safe paths before execution
7. Use application whitelisting to restrict DLL/library loading
8. Run MemProcFS with minimal required privileges in isolated containers or VMs
9. Monitor process execution and library loading using EDR solutions
DETECTION RULES:
- Alert on LoadLibrary/dlopen calls with unqualified paths from MemProcFS processes
- Monitor for suspicious DLL/SO files in MemProcFS working directories
- Track LD_LIBRARY_PATH modifications before MemProcFS execution
- Flag execution of MemProcFS from user-writable directories
PATCHING:
10. Subscribe to MemProcFS security advisories for version 5.17+ release
11. Establish testing procedures for patch deployment in forensic lab environments
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع تثبيتات MemProcFS عبر مؤسستك باستخدام أدوات اكتشاف الأصول
2. تقييد تنفيذ MemProcFS في بيئات معزولة وموثوقة مع مجلدات عمل محكومة
3. تطبيق أذونات نظام الملفات الصارمة على المجلدات التي يعمل فيها MemProcFS
4. تعطيل أو إزالة MemProcFS من أنظمة الإنتاج حتى يتم تصحيحها
الضوابط البديلة (حتى توفر التصحيح):
5. تنفيذ MemProcFS فقط من مجلدات معززة وقراءة فقط مع مسارات كاملة صريحة
6. تعيين LD_LIBRARY_PATH إلى فارغ أو مسارات آمنة محددة بوضوح قبل التنفيذ
7. استخدام القائمة البيضاء للتطبيقات لتقييد تحميل DLL/المكتبة
8. تشغيل MemProcFS بأقل صلاحيات مطلوبة في حاويات أو أجهزة افتراضية معزولة
9. مراقبة تنفيذ العمليات وتحميل المكتبات باستخدام حلول EDR
قواعد الكشف:
- تنبيهات على استدعاءات LoadLibrary/dlopen بمسارات غير مؤهلة من عمليات MemProcFS
- مراقبة ملفات DLL/SO المريبة في مجلدات عمل MemProcFS
- تتبع تعديلات LD_LIBRARY_PATH قبل تنفيذ MemProcFS
- وضع علامة على تنفيذ MemProcFS من مجلدات قابلة للكتابة من قبل المستخدم
التصحيح:
10. الاشتراك في تنبيهات أمان MemProcFS لإصدار 5.17+
11. إنشاء إجراءات اختبار لنشر التصحيح في بيئات المختبرات الجنائية
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Information security policies and procedures
ECC 2024 A.5.2.1 - Access control and privilege management
ECC 2024 A.5.3.1 - Cryptography and secure coding practices
ECC 2024 A.5.4.1 - Vulnerability and patch management
🔵 SAMA CSF
SAMA CSF ID.BE-1 - Asset management and inventory
SAMA CSF PR.AC-1 - Access control policies
SAMA CSF PR.PT-1 - Security awareness and training
SAMA CSF DE.CM-1 - Detection and monitoring
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for information security
ISO 27001:2022 A.5.2 - Information security organization
ISO 27001:2022 A.8.1 - Asset management
ISO 27001:2022 A.8.2 - Access control
ISO 27001:2022 A.8.6 - Cryptography
🟣 PCI DSS v4.0.1
PCI DSS 2.1 - Inventory of system components
PCI DSS 6.2 - Security patches and updates
PCI DSS 11.2 - Vulnerability scanning
🔗 References & Sources 4
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https://github.com/ufrisk/MemProcFS/commit/df80e6e83641f5004025ce661e6dd8139028d7b5
disclosure@vulncheck.com
https://github.com/ufrisk/MemProcFS/releases/tag/v5.17
disclosure@vulncheck.com
https://mobasi.ai/sentinel
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/memprocfs-dll-shared-library-hijacking
disclosure@vulncheck.com