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Vulnerabilities

CVE-2016-20048

High
iSelect 1.4.0-2+b1 contains a local buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized value to the -k/--key parameter. Attackers can craft a
CWE-22 — Weakness Type
Published: Mar 28, 2026  ·  Modified: Apr 4, 2026  ·  Source: NVD
CVSS v3
8.4
🔗 NVD Official
📄 Description (English)

iSelect 1.4.0-2+b1 contains a local buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized value to the -k/--key parameter. Attackers can craft a malicious argument containing a NOP sled, shellcode, and return address to overflow a 1024-byte stack buffer and gain code execution with user privileges.

🤖 AI Executive Summary

CVE-2016-20048 is a local buffer overflow vulnerability in iSelect 1.4.0-2+b1 that allows authenticated local attackers to execute arbitrary code through oversized -k/--key parameter input. With a CVSS score of 8.4, this vulnerability poses a significant risk to systems where iSelect is deployed, particularly in multi-user environments. No patch is currently available, requiring immediate compensating controls and monitoring.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 24, 2026 06:58
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily affects Saudi government and research institutions that may utilize iSelect for data processing or system administration tasks. Risk is elevated in organizations with shared computing environments or multi-user systems, particularly within NCSA (National Cybersecurity Authority) managed networks, academic institutions, and government data centers. The local nature of the attack limits exposure but poses significant insider threat risk. Telecom and financial sectors using legacy Unix/Linux systems for administrative purposes may also be affected.
🏢 Affected Saudi Sectors
Government Research & Academia Telecommunications Energy Healthcare Financial Services
⚖️ Saudi Risk Score (AI)
6.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all systems running iSelect 1.4.0-2+b1 across your infrastructure
2. Restrict local access to systems running iSelect through strict user access controls and privilege management
3. Implement principle of least privilege - disable iSelect if not actively required
4. Monitor process execution logs for suspicious -k parameter usage patterns

Compensating Controls (no patch available):
1. Implement AppArmor or SELinux profiles to restrict iSelect binary execution and memory access
2. Deploy system call filtering using seccomp to prevent shellcode execution
3. Enable ASLR (Address Space Layout Randomization) and stack canaries at OS level
4. Use file integrity monitoring (AIDE/Tripwire) to detect unauthorized binary modifications
5. Implement strict input validation at application wrapper level if iSelect is called programmatically

Detection Rules:
1. Monitor for iSelect process execution with unusually long -k parameter values (>1024 bytes)
2. Alert on iSelect crashes followed by unexpected process spawning
3. Track failed iSelect executions with segmentation fault errors
4. Monitor for NOP sled patterns (0x90 sequences) in process memory dumps
5. Log all iSelect invocations with full command-line arguments for forensic analysis
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تقوم بتشغيل iSelect 1.4.0-2+b1 عبر البنية التحتية الخاصة بك
2. تقييد الوصول المحلي للأنظمة التي تقوم بتشغيل iSelect من خلال ضوابط الوصول الصارمة وإدارة الامتيازات
3. تطبيق مبدأ أقل امتياز - تعطيل iSelect إذا لم يكن مطلوباً بنشاط
4. مراقبة سجلات تنفيذ العملية للأنماط المريبة لاستخدام معامل -k

الضوابط التعويضية (لا يتوفر تصحيح):
1. تطبيق ملفات تعريف AppArmor أو SELinux لتقييد تنفيذ ثنائي iSelect والوصول إلى الذاكرة
2. نشر تصفية استدعاء النظام باستخدام seccomp لمنع تنفيذ shellcode
3. تفعيل ASLR (عشوائية تخطيط مساحة العناوين) وكاشفات المكدس على مستوى نظام التشغيل
4. استخدام مراقبة سلامة الملفات (AIDE/Tripwire) للكشف عن التعديلات الثنائية غير المصرح بها
5. تطبيق التحقق من صحة الإدخال على مستوى غلاف التطبيق إذا تم استدعاء iSelect برمجياً

قواعد الكشف:
1. مراقبة تنفيذ عملية iSelect بقيم معامل -k طويلة بشكل غير عادي (>1024 بايت)
2. التنبيه على أعطال iSelect متبوعة بتوليد عملية غير متوقعة
3. تتبع تنفيذ iSelect الفاشل مع أخطاء انتهاك الجزء
4. مراقبة أنماط NOP sled (تسلسلات 0x90) في تفريغ ذاكرة العملية
5. تسجيل جميع استدعاءات iSelect مع معاملات سطر الأوامر الكاملة للتحليل الجنائي
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policies ECC 2024 A.8.1.1 - User Endpoint Devices ECC 2024 A.8.2.1 - Privileged Access Rights ECC 2024 A.8.3.1 - Password Management ECC 2024 A.12.2.1 - Change Management ECC 2024 A.12.6.1 - Management of Technical Vulnerabilities
🔵 SAMA CSF
SAMA CSF ID.AM-2 - Software Inventory SAMA CSF PR.AC-1 - Access Control Policy SAMA CSF PR.AC-4 - Access Rights Management SAMA CSF DE.CM-1 - System Monitoring SAMA CSF RS.MI-1 - Incident Response Procedures
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for Information Security ISO 27001:2022 A.6.1 - Screening ISO 27001:2022 A.8.1 - User Endpoint Devices ISO 27001:2022 A.8.2 - Privileged Access Rights ISO 27001:2022 A.12.2 - Change Management ISO 27001:2022 A.12.6 - Management of Technical Vulnerabilities
📊 CVSS Score
8.4
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.4
CWECWE-22
EPSS0.02%
Exploit No
Patch ✗ No
Published 2026-03-28
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
6.2
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-22
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