📄 Description (English)
OpenSMTPD Remote Code Execution Vulnerability — smtp_mailaddr in smtp_session.c in OpenSMTPD, as used in OpenBSD and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session.
🤖 AI Executive Summary
CVE-2020-7247 is a critical remote code execution vulnerability in OpenSMTPD affecting SMTP mail servers used across Saudi organizations. An unauthenticated remote attacker can execute arbitrary commands with root privileges through a crafted SMTP session, requiring no user interaction. This vulnerability poses an immediate threat to email infrastructure and has publicly available exploits.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 19, 2026 13:54
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability critically impacts Saudi banking sector (SAMA-regulated institutions), government agencies (NCA oversight), telecommunications providers (STC, Mobily), and energy sector (ARAMCO). Email servers are foundational infrastructure; compromise enables lateral movement, data exfiltration, business email compromise (BEC), and supply chain attacks. Healthcare organizations using OpenSMTPD face patient data exposure risks. The root-level execution capability allows complete system takeover.
🏢 Affected Saudi Sectors
Banking and Financial Services (SAMA-regulated)
Government and Public Administration (NCA oversight)
Telecommunications (STC, Mobily, Zain)
Energy and Utilities (ARAMCO, SEC)
Healthcare and Pharmaceuticals
Education and Research Institutions
Critical Infrastructure Operators
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all OpenSMTPD instances in your environment using network scanning and asset inventory tools
2. Isolate affected mail servers from untrusted networks if patching cannot be completed immediately
3. Enable SMTP authentication and restrict SMTP access to trusted IP ranges
4. Monitor SMTP logs for suspicious connection patterns and malformed commands
PATCHING:
1. Apply OpenSMTPD security patches immediately (versions 6.6.2p1 and later)
2. For OpenBSD systems, apply errata patches via 'syspatch' utility
3. Verify patch installation by checking OpenSMTPD version: smtpd -v
4. Restart SMTP service after patching: rcctl restart smtpd
COMPENSATING CONTROLS (if immediate patching impossible):
1. Implement network-level SMTP filtering using WAF/IPS rules blocking malformed SMTP commands
2. Deploy rate limiting on SMTP connections
3. Use firewall rules to restrict SMTP access to known legitimate sources
4. Implement SMTP proxy/gateway with input validation
DETECTION:
1. Monitor for SMTP commands with unusual characters or excessive length in recipient fields
2. Alert on SMTP connections from unexpected sources
3. Track failed SMTP authentication attempts and connection resets
4. Search logs for patterns: 'smtp_mailaddr', 'rcpt to:', or command injection attempts
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع مثيلات OpenSMTPD في بيئتك باستخدام أدوات المسح والجرد
2. عزل خوادم البريد المتأثرة عن الشبكات غير الموثوقة إذا لم يكن التصحيح ممكناً فوراً
3. تفعيل مصادقة SMTP وتقييد الوصول إلى نطاقات IP الموثوقة
4. مراقبة سجلات SMTP للأنماط المريبة والأوامر المشوهة
التصحيح:
1. تطبيق تصحيحات أمان OpenSMTPD فوراً (الإصدارات 6.6.2p1 والأحدث)
2. لأنظمة OpenBSD، تطبيق تصحيحات الأخطاء عبر أداة 'syspatch'
3. التحقق من تثبيت التصحيح بفحص الإصدار: smtpd -v
4. إعادة تشغيل خدمة SMTP بعد التصحيح: rcctl restart smtpd
الضوابط البديلة (إذا كان التصحيح الفوري مستحيلاً):
1. تطبيق تصفية SMTP على مستوى الشبكة باستخدام قواعد WAF/IPS
2. نشر تحديد معدل الاتصالات SMTP
3. استخدام قواعد جدار الحماية لتقييد الوصول إلى المصادر الموثوقة
4. تطبيق بوابة/وكيل SMTP مع التحقق من الإدخال
الكشف:
1. مراقبة أوامر SMTP بأحرف غير عادية أو طول مفرط
2. التنبيه على اتصالات SMTP من مصادر غير متوقعة
3. تتبع محاولات المصادقة الفاشلة وإعادة تعيين الاتصال
4. البحث في السجلات عن أنماط الحقن
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.6.1 - Management of technical vulnerabilities
ECC 2024 A.14.2.1 - Secure development policy
ECC 2024 A.12.2.1 - Monitoring and logging of access
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification
PR.IP-12 - Software, firmware, and information integrity mechanisms
DE.CM-8 - Vulnerability scans are performed
🟡 ISO 27001:2022
A.12.2.1 - Monitoring and logging of access to information and information processing facilities
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development policy and procedures
🟣 PCI DSS v4.0
Requirement 6.2 - Ensure security patches are installed within one month of release
Requirement 11.2 - Run automated vulnerability scanning tools regularly
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
OpenBSD:OpenSMTPD