📄 Description (English)
MailGates/MailAudit developed by Openfind has a CRLF Injection vulnerability, allowing unauthenticated remote attackers to exploit this vulnerability to read system files.
🤖 AI Executive Summary
CVE-2026-6351 is a CRLF injection vulnerability in Openfind's MailGates/MailAudit email security solution that allows unauthenticated remote attackers to read arbitrary system files. With a CVSS score of 7.5 and no patch currently available, this poses an immediate risk to organizations relying on this email gateway for security. The vulnerability requires urgent mitigation as email gateways are critical infrastructure in Saudi organizations handling sensitive communications.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 30, 2026 04:37
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA oversight), and critical infrastructure operators. Email gateways are essential for secure communications in Saudi organizations. Exploitation could lead to unauthorized access to sensitive business communications, customer data, and system configuration files. Telecom operators (STC, Mobily) and healthcare providers using MailGates/MailAudit are particularly vulnerable. The lack of authentication requirement makes this especially critical for organizations with internet-facing email infrastructure.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Telecommunications
Healthcare
Energy and Utilities
Critical Infrastructure
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all instances of MailGates/MailAudit in your environment and document versions
2. Implement network segmentation to restrict access to email gateway management interfaces
3. Deploy WAF rules to block CRLF injection patterns (\r\n sequences) in email gateway requests
4. Enable comprehensive logging and monitoring of all email gateway access attempts
5. Restrict email gateway access to authorized networks only using firewall rules
COMPENSATING CONTROLS (until patch available):
6. Implement reverse proxy with input validation in front of MailGates/MailAudit
7. Deploy IDS/IPS signatures to detect CRLF injection attempts
8. Monitor for suspicious file read operations and system file access patterns
9. Implement strict access controls limiting who can interact with the email gateway
10. Consider temporary isolation of non-critical MailGates/MailAudit instances
DETECTION RULES:
- Alert on HTTP requests containing %0d%0a or \r\n sequences to MailGates/MailAudit endpoints
- Monitor for unusual file access patterns (etc/passwd, config files) from email gateway processes
- Track failed authentication attempts followed by file read operations
- Log all administrative access to MailGates/MailAudit interfaces
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع حالات MailGates/MailAudit في بيئتك وتوثيق الإصدارات
2. تطبيق تقسيم الشبكة لتقييد الوصول إلى واجهات إدارة بوابة البريد
3. نشر قواعد WAF لحجب أنماط حقن CRLF (تسلسلات \r\n) في طلبات بوابة البريد
4. تفعيل السجلات الشاملة ومراقبة جميع محاولات الوصول إلى بوابة البريد
5. تقييد وصول بوابة البريد إلى الشبكات المصرح بها فقط باستخدام قواعد جدار الحماية
الضوابط البديلة (حتى توفر التصحيح):
6. تطبيق وكيل عكسي مع التحقق من الإدخال أمام MailGates/MailAudit
7. نشر توقيعات IDS/IPS للكشف عن محاولات حقن CRLF
8. مراقبة عمليات قراءة الملفات المريبة وأنماط الوصول إلى ملفات النظام
9. تطبيق ضوابط وصول صارمة تحد من يمكنه التفاعل مع بوابة البريد
10. النظر في العزل المؤقت لحالات MailGates/MailAudit غير الحرجة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1 - Access Control and Authentication
ECC 2024 A.5.2 - User Access Management
ECC 2024 A.6.1 - Cryptography and Data Protection
ECC 2024 A.12.4 - Logging and Monitoring
ECC 2024 A.12.6 - Management of Technical Vulnerabilities
🔵 SAMA CSF
SAMA CSF ID.AM-2 - Software, hardware, and firmware inventory
SAMA CSF PR.AC-1 - Access control policy and procedures
SAMA CSF PR.AC-4 - Access rights and privileges
SAMA CSF DE.CM-1 - Network monitoring
SAMA CSF RS.MI-2 - Incidents are mitigated
🟡 ISO 27001:2022
ISO 27001:2022 A.5.3 - Segregation of duties
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.12.6 - Management of technical vulnerabilities
🟣 PCI DSS v4.0.1
PCI DSS 1.1 - Firewall configuration standards
PCI DSS 2.1 - Default security parameters
PCI DSS 6.2 - Security patches and updates
PCI DSS 10.1 - Audit trails implementation