📄 Description (English)
NetBSD prior to commit ec8451e contains a signed integer overflow vulnerability in the cryptodev_op() function in sys/opencrypto/cryptodev.c where the local variable iov_len is declared as a signed int but assigned from an unsigned cop->dst_len value, causing undefined behavior when cop->dst_len exceeds INT_MAX. A local attacker with access to /dev/crypto and a compression session type can exploit this vulnerability by providing a dst_len value exceeding INT_MAX to trigger a kernel panic through NULL pointer dereference when CONFIG_SVS is disabled and corrupted UIO pointer arithmetic.
🤖 AI Executive Summary
NetBSD contains a signed integer overflow vulnerability in cryptodev_op() function that can be exploited by local attackers with /dev/crypto access to trigger kernel panics. The vulnerability affects compression session types when CONFIG_SVS is disabled, potentially impacting systems using NetBSD for cryptographic operations. While currently no public exploit exists and patches are unavailable, the medium CVSS score and local-only attack vector limit immediate enterprise risk in most Saudi environments.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 26, 2026 04:33
🇸🇦 Saudi Arabia Impact Assessment
Impact is limited to Saudi organizations running NetBSD systems, which is uncommon in enterprise environments. Primary risk sectors include: (1) Government research institutions and academic centers using BSD-based systems for cryptographic research; (2) Specialized financial technology firms or fintech startups potentially using NetBSD for secure payment processing; (3) Telecommunications infrastructure providers (STC, Mobily) if they utilize NetBSD in legacy cryptographic appliances. ARAMCO and SAMA banking systems predominantly use Linux and proprietary systems, making them low-risk. The local-only attack vector significantly reduces risk unless NetBSD systems are shared multi-user environments with untrusted users.
🏢 Affected Saudi Sectors
Government Research & Academia
Fintech & Payment Processing
Telecommunications
Cybersecurity Research Institutions
Legacy System Infrastructure
🎯 MITRE ATT&CK Techniques
T1499 - Endpoint Denial of Service: Kernel panic via integer overflow
T1068 - Exploitation for Privilege Escalation: Local privilege escalation potential through kernel crash
T1040 - Traffic Capture or Redirection: Potential cryptographic operation disruption
T1657 - Financial Theft: If affecting payment processing systems
⚖️ Saudi Risk Score (AI)
3.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all NetBSD systems in your infrastructure, particularly those with /dev/crypto enabled and CONFIG_SVS disabled
2. Restrict local access to /dev/crypto device to trusted users only using file permissions (chmod 600 /dev/crypto)
3. Disable compression session types in cryptodev if not required for operations
4. Monitor for kernel panic logs and system crashes related to cryptodev operations
Patching Guidance:
1. Apply commit ec8451e or later from NetBSD repository when available
2. Until official patches are released, consider upgrading to latest NetBSD stable branch
3. Enable CONFIG_SVS in kernel configuration to add additional protection layer
Compensating Controls:
1. Implement strict access controls to /dev/crypto (restrict to root/service accounts only)
2. Use SELinux or AppArmor policies to restrict cryptodev access
3. Disable compression session types in cryptodev configuration if not operationally required
4. Implement kernel crash monitoring and alerting for early detection
5. Consider running cryptographic operations in isolated containers with limited privileges
Detection Rules:
1. Monitor for /dev/crypto access attempts from non-privileged users
2. Alert on kernel panic messages containing 'cryptodev' or 'UIO pointer' references
3. Track failed cryptodev_op() calls with large dst_len values
4. Monitor system logs for integer overflow warnings in crypto subsystem
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أنظمة NetBSD في البنية التحتية الخاصة بك، خاصة تلك التي تحتوي على /dev/crypto مفعل و CONFIG_SVS معطل
2. تقييد الوصول المحلي إلى جهاز /dev/crypto للمستخدمين الموثوقين فقط باستخدام أذونات الملفات (chmod 600 /dev/crypto)
3. تعطيل أنواع جلسات الضغط في cryptodev إذا لم تكن مطلوبة للعمليات
4. مراقبة سجلات توقف النواة وأعطال النظام المتعلقة بعمليات cryptodev
إرشادات التصحيح:
1. تطبيق commit ec8451e أو إصدار أحدث من مستودع NetBSD عند توفره
2. حتى يتم إصدار التصحيحات الرسمية، فكر في الترقية إلى أحدث فرع NetBSD مستقر
3. تفعيل CONFIG_SVS في تكوين النواة لإضافة طبقة حماية إضافية
الضوابط البديلة:
1. تنفيذ ضوابط وصول صارمة إلى /dev/crypto (تقييد الوصول إلى حسابات root/الخدمة فقط)
2. استخدام سياسات SELinux أو AppArmor لتقييد الوصول إلى cryptodev
3. تعطيل أنواع جلسات الضغط في تكوين cryptodev إذا لم تكن مطلوبة تشغيلياً
4. تنفيذ مراقبة التنبيهات لأعطال النواة للكشف المبكر
5. فكر في تشغيل العمليات التشفيرية في حاويات معزولة بامتيازات محدودة
قواعد الكشف:
1. مراقبة محاولات الوصول إلى /dev/crypto من المستخدمين غير المميزين
2. التنبيه على رسائل توقف النواة التي تحتوي على مراجع 'cryptodev' أو 'UIO pointer'
3. تتبع استدعاءات cryptodev_op() الفاشلة بقيم dst_len كبيرة
4. مراقبة سجلات النظام لتحذيرات تجاوز الأعداد الصحيحة في نظام التشفير الفرعي
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control: Restrict /dev/crypto access to authorized personnel
ECC 2024 A.5.2.1 - User Registration and Access Management: Implement principle of least privilege for cryptodev access
ECC 2024 A.6.2.1 - Malware Protection: Monitor for kernel exploits and system crashes
ECC 2024 A.12.6.1 - Management of Technical Vulnerabilities: Patch and update NetBSD systems
🔵 SAMA CSF
SAMA CSF ID.GV-1: Organizational Cybersecurity Policy - Include NetBSD system hardening requirements
SAMA CSF PR.AC-1: Access Control - Restrict /dev/crypto device access
SAMA CSF PR.PT-1: Protection Processes - Implement kernel security configurations (CONFIG_SVS)
SAMA CSF DE.CM-1: Detection and Analysis - Monitor for cryptodev-related kernel panics
🟡 ISO 27001:2022
ISO 27001:2022 A.5.15 - Access Control: Implement least privilege access to /dev/crypto
ISO 27001:2022 A.8.1 - Cryptography: Ensure secure cryptographic operations and prevent integer overflow attacks
ISO 27001:2022 A.12.6.1 - Management of Technical Vulnerabilities: Maintain patch management for NetBSD systems
ISO 27001:2022 A.12.3.1 - Logging: Monitor and log all /dev/crypto access attempts
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security Patches: Apply NetBSD patches when available
PCI DSS 7.1 - Access Control: Restrict access to /dev/crypto to authorized personnel only
PCI DSS 10.2 - Logging: Log all access to cryptographic devices and functions
🔗 References & Sources 3