📄 Description (English)
GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability — GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute code.
🤖 AI Executive Summary
CVE-2014-6271 (Shellshock) is a critical remote code execution vulnerability in GNU Bash that allows attackers to execute arbitrary commands through specially crafted environment variables. Despite being from 2014, this vulnerability remains exploitable in legacy systems and IoT devices across Saudi infrastructure. With public exploits widely available and a CVSS score of 9.0, unpatched systems face immediate risk of complete compromise, particularly in government services, industrial control systems, and legacy banking infrastructure.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Mar 22, 2026 07:34
🇸🇦 Saudi Arabia Impact Assessment
Critical impact on Saudi organizations due to widespread Bash usage in Linux/Unix systems. Banking sector (SAMA-regulated entities) faces risk in core banking systems, ATM networks, and payment gateways running legacy Unix. Government entities under NCA oversight are vulnerable through web applications, CGI scripts, and DHCP clients in e-government portals (Yesser, Absher). Energy sector (ARAMCO, SEC) has significant exposure in SCADA systems, industrial control systems, and operational technology networks. Telecom providers (STC, Mobily, Zain) risk compromise of network management systems and billing platforms. Healthcare sector vulnerable through medical device management systems and hospital information systems. The vulnerability enables complete system takeover, data exfiltration, ransomware deployment, and lateral movement across Saudi critical infrastructure.
🏢 Affected Saudi Sectors
Banking
Government
Energy
Telecommunications
Healthcare
Education
Transportation
Manufacturing
Retail
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Conduct emergency scan of all Linux/Unix systems to identify Bash versions (bash --version)
2. Implement network segmentation to isolate vulnerable systems from internet-facing services
3. Deploy IDS/IPS signatures to detect Shellshock exploitation attempts
PATCHING GUIDANCE:
4. Apply vendor patches immediately for all affected systems:
- Red Hat/CentOS: yum update bash
- Ubuntu/Debian: apt-get update && apt-get install --only-upgrade bash
- SUSE: zypper update bash
5. Verify patch effectiveness using: env x='() { :;}; echo vulnerable' bash -c "echo test"
6. Prioritize patching: internet-facing web servers, DHCP servers, SSH servers, then internal systems
COMPENSATING CONTROLS (if patching delayed):
7. Disable CGI scripts on web servers or migrate to non-Bash interpreters
8. Implement WAF rules blocking requests with "() {" patterns in headers
9. Restrict SSH access using IP whitelisting and MFA
10. Monitor for suspicious bash process execution and outbound connections
DETECTION RULES:
11. SIEM alerts for HTTP requests containing: "() {:;};" in User-Agent, Referer, Cookie headers
12. Monitor bash process spawning from web servers (httpd, nginx)
13. Alert on unexpected outbound connections from system services
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. إجراء فحص طارئ لجميع أنظمة Linux/Unix لتحديد إصدارات Bash (bash --version)
2. تطبيق تقسيم الشبكة لعزل الأنظمة المعرضة للخطر عن الخدمات المتصلة بالإنترنت
3. نشر توقيعات IDS/IPS للكشف عن محاولات استغلال Shellshock
إرشادات التصحيح:
4. تطبيق تصحيحات البائعين فوراً لجميع الأنظمة المتأثرة:
- Red Hat/CentOS: yum update bash
- Ubuntu/Debian: apt-get update && apt-get install --only-upgrade bash
- SUSE: zypper update bash
5. التحقق من فعالية التصحيح باستخدام: env x='() { :;}; echo vulnerable' bash -c "echo test"
6. أولوية التصحيح: خوادم الويب المتصلة بالإنترنت، خوادم DHCP، خوادم SSH، ثم الأنظمة الداخلية
الضوابط التعويضية (في حال تأخر التصحيح):
7. تعطيل نصوص CGI على خوادم الويب أو الترحيل إلى مفسرات غير Bash
8. تطبيق قواعد WAF لحظر الطلبات التي تحتوي على أنماط "() {" في الرؤوس
9. تقييد وصول SSH باستخدام القائمة البيضاء لعناوين IP والمصادقة متعددة العوامل
10. مراقبة تنفيذ عمليات bash المشبوهة والاتصالات الصادرة
قواعد الكشف:
11. تنبيهات SIEM لطلبات HTTP تحتوي على: "() {:;};" في رؤوس User-Agent وReferer وCookie
12. مراقبة عمليات bash المنبثقة من خوادم الويب (httpd، nginx)
13. التنبيه على الاتصالات الصادرة غير المتوقعة من خدمات النظام
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5-1-1: Vulnerability Management - Critical vulnerability remediation within 15 days
4-1-3: Security Patch Management - Emergency patching procedures
6-2-1: Network Security - Network segmentation and access control
7-1-1: Security Monitoring - Continuous monitoring and threat detection
3-1-2: Risk Assessment - Critical infrastructure vulnerability assessment
🔵 SAMA CSF
CCC-01: Cybersecurity Governance - Incident response for critical vulnerabilities
CCC-04: Vulnerability and Patch Management - Emergency patch deployment
CCC-06: Network Security - Segmentation of banking systems
CCC-08: Monitoring and Analysis - Real-time threat detection
CCC-10: Third-Party Cybersecurity - Vendor system vulnerability management
🟡 ISO 27001:2022
A.12.6.1: Management of technical vulnerabilities - Timely patching
A.13.1.3: Segregation in networks - Network isolation
A.12.2.1: Controls against malware - Exploit prevention
A.16.1.4: Assessment of security events - Shellshock detection
A.18.2.3: Technical compliance review - Regulatory compliance verification
🟣 PCI DSS v4.0
6.2: Ensure all systems are protected from known vulnerabilities
6.6: Web application protection (WAF deployment)
10.6: Review logs for anomalies (Shellshock exploitation attempts)
11.2: Quarterly vulnerability scans for cardholder data environment
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
GNU:Bourne-Again Shell (Bash)