📄 Description (English)
FTPShell Server 6.83 contains a buffer overflow vulnerability that allows local attackers to crash the application by supplying an excessively long string in the account name field. Attackers can trigger a denial of service by pasting a 417-byte payload into the 'Account name to ban' parameter within the Manage FTP Accounts interface.
🤖 AI Executive Summary
FTPShell Server 6.83 contains a buffer overflow vulnerability (CVE-2018-25226) allowing local attackers to cause denial of service by injecting oversized strings into the account management interface. With CVSS 6.2 and public exploits available, this poses a moderate risk to organizations using legacy FTP infrastructure. No official patch is available, requiring immediate mitigation through access controls and application replacement planning.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 21, 2026 17:25
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using FTPShell Server 6.83 for file transfer operations face service disruption risks. Most affected sectors include: Government agencies (NCA, CITC) managing legacy infrastructure; Banking sector (SAMA-regulated institutions) using FTP for secure file transfers; Energy sector (ARAMCO, utilities) with legacy system integration; Telecom operators (STC, Mobily) managing network file services. The vulnerability requires local access, limiting external exploitation but posing insider threat risks in multi-user environments.
🏢 Affected Saudi Sectors
Government
Banking
Energy
Telecommunications
Healthcare
Education
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
5.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all FTPShell Server 6.83 instances in your environment using network scanning and asset inventory tools
2. Restrict local access to FTPShell Server management interfaces through OS-level access controls and firewall rules
3. Implement principle of least privilege - limit user accounts with access to 'Manage FTP Accounts' interface
4. Enable application logging and monitor for suspicious account management activities
Compensating Controls:
1. Deploy host-based intrusion detection (HIDS) to monitor FTPShell process crashes and abnormal terminations
2. Implement input validation at the application wrapper level if possible
3. Run FTPShell in a sandboxed or containerized environment to limit impact of DoS
4. Configure automated service restart mechanisms with alerting
Long-term Remediation:
1. Plan immediate migration to modern SFTP solutions (OpenSSH, ProFTPD with security patches)
2. Evaluate alternative secure file transfer protocols (SFTP, HTTPS-based solutions)
3. Decommission FTPShell Server 6.83 within 90 days
Detection Rules:
1. Monitor for FTPShell process crashes: Event ID 1000 (Application Error) with FTPShell.exe
2. Alert on account name field inputs exceeding 256 bytes
3. Track failed FTP account management operations
4. Monitor for repeated service restarts within short time windows
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع نسخ خادم FTPShell 6.83 في البيئة باستخدام أدوات المسح والجرد
2. تقييد الوصول المحلي لواجهات إدارة الخادم من خلال عناصر التحكم في نظام التشغيل وقواعد جدار الحماية
3. تطبيق مبدأ الحد الأدنى من الامتيازات - تحديد حسابات المستخدمين بوصول إلى واجهة إدارة حسابات FTP
4. تفعيل تسجيل التطبيق ومراقبة الأنشطة المريبة
الضوابط البديلة:
1. نشر كشف التسلل على مستوى المضيف (HIDS) لمراقبة أعطال العملية
2. تنفيذ التحقق من صحة المدخلات على مستوى التطبيق
3. تشغيل FTPShell في بيئة معزولة أو حاوية
4. تكوين آليات إعادة تشغيل الخدمة الآلية مع التنبيهات
المعالجة طويلة الأجل:
1. التخطيط للهجرة الفورية إلى حلول SFTP الحديثة
2. تقييم بروتوكولات نقل الملفات الآمنة البديلة
3. إيقاف تشغيل FTPShell Server 6.83 خلال 90 يوماً
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policies (restrict local access)
ECC 2024 A.5.2.1 - User Registration and Access Rights Management
ECC 2024 A.12.4.1 - Event Logging (monitor FTPShell crashes)
ECC 2024 A.14.2.1 - System Change Management (patch/replacement planning)
🔵 SAMA CSF
ID.AM-2 - Asset Management (inventory FTPShell instances)
PR.AC-1 - Access Control Policy (restrict management interface access)
DE.CM-1 - Detection and Analysis (monitor for DoS indicators)
RS.MI-2 - Incident Mitigation (service restart procedures)
🟡 ISO 27001:2022
A.5.1.1 - Policies for information security
A.5.2.1 - Information security responsibilities
A.6.1.1 - Screening
A.8.1.1 - User endpoint devices
A.12.4.1 - Event logging
A.14.2.1 - Change management
🟣 PCI DSS v4.0.1
Requirement 1.1 - Firewall configuration standards (restrict access)
Requirement 2.1 - Default security parameters (disable if not needed)
Requirement 6.2 - Security patches (plan replacement)
Requirement 10.2 - Logging and monitoring
🔗 References & Sources 4
🔗
http://www.ftpshell.com/downloadserver.htm
disclosure@vulncheck.com
Broken Link
🔗
http://www.ftpshell.com/index.htm
disclosure@vulncheck.com
Product
🔗
https://www.exploit-db.com/exploits/46430
disclosure@vulncheck.com
Exploit
VDB Entry
🔗
https://www.vulncheck.com/advisories/ftpshell-server-denial-of-service-via-account-name
disclosure@vulncheck.com
Third Party Advisory
📦 Affected Products / CPE 1 entries
ftpshell:ftpshell_server:6.83