📄 Description (English)
Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability — A buffer overflow vulnerability in the Simple Network Management Protocol (SNMP) code of Cisco ASA software could allow an attacker to cause a reload of the affected system or to remotely execute code.
🤖 AI Executive Summary
CVE-2016-6366 is a critical buffer overflow vulnerability in Cisco ASA's SNMP implementation that allows authenticated attackers to cause device reloads or achieve remote code execution. This vulnerability was part of the 'Shadow Brokers' leak of NSA exploit tools (known as EXTRABACON), making it extremely dangerous as weaponized exploits are publicly available. With a CVSS score of 9.0, this affects one of the most widely deployed firewall platforms globally. Despite being from 2016, unpatched Cisco ASA devices remain a significant risk, especially in environments where SNMP is exposed.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 6, 2026 08:29
🇸🇦 Saudi Arabia Impact Assessment
Cisco ASA firewalls are extensively deployed across Saudi Arabia's critical infrastructure including banking institutions regulated by SAMA, government entities under NCA oversight, ARAMCO and energy sector networks, telecom providers like STC/Mobily/Zain, and healthcare organizations. Exploitation could allow attackers to bypass perimeter security entirely, gaining remote code execution on border firewalls. Saudi organizations using SNMP v1/v2c with community strings on ASA devices are at highest risk. Given the availability of weaponized exploits (EXTRABACON), nation-state actors targeting Saudi critical infrastructure could leverage this vulnerability for initial access or lateral movement.
🏢 Affected Saudi Sectors
Banking
Government
Energy
Telecommunications
Healthcare
Defense
Education
Retail
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Cisco ASA devices in your environment and verify SNMP configuration
2. Disable SNMP on ASA devices where not strictly required: 'no snmp-server enable'
3. If SNMP is required, restrict access using ACLs to specific management stations only
4. Change all default SNMP community strings immediately
PATCHING GUIDANCE:
1. Apply Cisco security advisory cisco-sa-20160817-asa-snmp patches immediately
2. Upgrade ASA software to a fixed version as specified in Cisco's advisory
3. Prioritize internet-facing ASA devices first
COMPENSATING CONTROLS:
1. Migrate from SNMPv1/v2c to SNMPv3 with authentication and encryption
2. Implement network segmentation to isolate management interfaces
3. Block SNMP ports (UDP 161/162) at upstream devices from untrusted networks
4. Enable ASA syslog monitoring for SNMP-related anomalies
DETECTION RULES:
1. Monitor for unusual SNMP traffic patterns to ASA management interfaces
2. Deploy IDS/IPS signatures for EXTRABACON exploit (Snort SID available)
3. Alert on ASA unexpected reloads which may indicate exploitation attempts
4. Monitor for SNMP requests from unauthorized source IPs
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Cisco ASA في بيئتكم والتحقق من إعدادات SNMP
2. تعطيل SNMP على أجهزة ASA حيث لا تكون مطلوبة: 'no snmp-server enable'
3. إذا كان SNMP مطلوباً، تقييد الوصول باستخدام قوائم التحكم بالوصول لمحطات الإدارة المحددة فقط
4. تغيير جميع سلاسل مجتمع SNMP الافتراضية فوراً
إرشادات التحديث:
1. تطبيق تحديثات Cisco الأمنية cisco-sa-20160817-asa-snmp فوراً
2. ترقية برنامج ASA إلى إصدار مُصحح وفقاً لإرشادات Cisco
3. إعطاء الأولوية لأجهزة ASA المواجهة للإنترنت أولاً
الضوابط التعويضية:
1. الانتقال من SNMPv1/v2c إلى SNMPv3 مع المصادقة والتشفير
2. تطبيق تجزئة الشبكة لعزل واجهات الإدارة
3. حظر منافذ SNMP (UDP 161/162) من الشبكات غير الموثوقة
4. تفعيل مراقبة سجلات ASA للأنشطة المتعلقة بـ SNMP
قواعد الكشف:
1. مراقبة أنماط حركة SNMP غير العادية لواجهات إدارة ASA
2. نشر توقيعات IDS/IPS لاستغلال EXTRABACON
3. التنبيه عند إعادة تشغيل ASA غير المتوقعة
4. مراقبة طلبات SNMP من عناوين IP غير مصرح بها
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC-2:3-1 (Network Security)
ECC-2:3-3 (Security of Network Services)
ECC-2:5-1 (Vulnerability Management)
ECC-2:3-4 (Firewall Management)
🔵 SAMA CSF
3.3.3 (Network Security Management)
3.3.4 (Security of Network Services)
3.4.1 (Vulnerability Management)
3.3.7 (Infrastructure Security)
🟡 ISO 27001:2022
A.8.9 (Configuration Management)
A.8.8 (Management of Technical Vulnerabilities)
A.8.20 (Networks Security)
A.8.21 (Security of Network Services)
🟣 PCI DSS v4.0
PCI DSS 6.3.3 (Patching Security Vulnerabilities)
PCI DSS 1.2.1 (Firewall Configuration)
PCI DSS 2.2.2 (Disable Unnecessary Services)
PCI DSS 11.3 (Penetration Testing)
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Cisco:Adaptive Security Appliance (ASA)