📄 Description (English)
Citrix ShareFile Improper Access Control Vulnerability — Improper Access Control in Citrix ShareFile storage zones controller may allow an unauthenticated attacker to remotely compromise the storage zones controller.
🤖 AI Executive Summary
CVE-2021-22941 is a critical improper access control vulnerability in Citrix ShareFile storage zones controller (CVSS 9.0) that allows unauthenticated remote attackers to compromise the controller without authentication. With public exploits available, this poses an immediate threat to organizations using ShareFile for document management and collaboration. Immediate patching is essential as the vulnerability enables complete system compromise.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 20, 2026 03:54
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations across multiple critical sectors are at significant risk: Banking sector (SAMA-regulated institutions) using ShareFile for secure document exchange and client communications; Government agencies (NCA oversight) relying on ShareFile for inter-agency collaboration; Healthcare providers managing patient records; Energy sector (ARAMCO and subsidiaries) for operational documentation; Telecommunications (STC, Mobily) for internal communications. The unauthenticated nature of the exploit makes this particularly dangerous for organizations with internet-facing ShareFile deployments.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare and Medical Services
Energy and Utilities
Telecommunications
Insurance
Legal Services
Education
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Citrix ShareFile storage zones controller instances in your environment, including internet-facing deployments
2. Implement network segmentation to restrict access to ShareFile storage zones controllers to authorized networks only
3. Enable detailed logging and monitoring for all access attempts to storage zones controllers
4. Review recent access logs for indicators of compromise (unusual authentication patterns, data exfiltration)
PATCHING GUIDANCE:
1. Apply Citrix security patches immediately (Citrix released patches in March 2021)
2. Verify patch application by checking Citrix ShareFile version numbers
3. Test patches in non-production environments first
4. Schedule maintenance windows for production patching
COMPENSATING CONTROLS (if patching delayed):
1. Deploy Web Application Firewall (WAF) rules to block exploitation attempts
2. Implement IP whitelisting for storage zones controller access
3. Disable internet-facing access if not operationally required
4. Implement VPN requirement for all remote access
DETECTION RULES:
1. Monitor for HTTP requests to storage zones controller endpoints without proper authentication headers
2. Alert on unusual file access patterns or bulk downloads from ShareFile
3. Track failed authentication attempts followed by successful access
4. Monitor for suspicious API calls to storage zones controller
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع مثيلات وحدة تحكم مناطق التخزين في Citrix ShareFile في بيئتك، بما في ذلك النشرات المواجهة للإنترنت
2. تنفيذ تقسيم الشبكة لتقييد الوصول إلى وحدات التحكم في مناطق التخزين للشبكات المصرح بها فقط
3. تفعيل السجلات المفصلة والمراقبة لجميع محاولات الوصول
4. مراجعة سجلات الوصول الأخيرة للبحث عن مؤشرات الاختراق
إرشادات التصحيح:
1. تطبيق تصحيحات أمان Citrix فوراً (تم إصدار التصحيحات في مارس 2021)
2. التحقق من تطبيق التصحيح بفحص أرقام إصدارات Citrix ShareFile
3. اختبار التصحيحات في بيئات غير الإنتاج أولاً
4. جدولة نوافذ الصيانة لتصحيح الإنتاج
الضوابط البديلة (إذا تأخر التصحيح):
1. نشر قواعد جدار حماية تطبيقات الويب لحجب محاولات الاستغلال
2. تنفيذ القائمة البيضاء للعناوين IP للوصول إلى وحدة التحكم
3. تعطيل الوصول المواجه للإنترنت إذا لم يكن مطلوباً تشغيلياً
4. تنفيذ متطلبات VPN لجميع الوصول عن بعد
قواعد الكشف:
1. مراقبة طلبات HTTP إلى نقاط نهاية وحدة التحكم بدون رؤوس مصادقة صحيحة
2. التنبيه على أنماط الوصول غير العادية أو التنزيلات الضخمة من ShareFile
3. تتبع محاولات المصادقة الفاشلة متبوعة بالوصول الناجح
4. مراقبة استدعاءات API المريبة إلى وحدة التحكم
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures
A.6.1.1 - Access control policy
A.6.2.1 - User registration and de-registration
A.8.2.1 - Classification of information
A.8.2.3 - Handling of assets
A.12.4.1 - Event logging
A.12.4.3 - Administrator and operator logs
🔵 SAMA CSF
ID.AC-1 - Access Control Policy
ID.AC-3 - Access Enforcement
DE.AE-1 - Audit Logs
DE.AE-3 - Detect Unauthorized Access
PR.AC-1 - Identities and Credentials
PR.AC-3 - Access Enforcement
🟡 ISO 27001:2022
6.2 - User access management
8.2.1 - User registration and access rights
8.2.3 - Management of privileged access rights
8.3.1 - Information access restriction
8.3.2 - Access to networks and network services
8.3.4 - Restriction of information access
8.4.1 - Event logging
🟣 PCI DSS v4.0
Requirement 1 - Firewall configuration
Requirement 2 - Default passwords
Requirement 6 - Secure development
Requirement 7 - Access control
Requirement 8 - User identification and authentication
Requirement 10 - Logging and monitoring
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Citrix:ShareFile