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Vulnerabilities

CVE-2021-22204

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
ExifTool Remote Code Execution Vulnerability — Improper neutralization of user data in the DjVu file format in Exiftool versions 7.44 and up allows arbitrary code execution when parsing the malicious
Published: Nov 17, 2021  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

ExifTool Remote Code Execution Vulnerability — Improper neutralization of user data in the DjVu file format in Exiftool versions 7.44 and up allows arbitrary code execution when parsing the malicious image

🤖 AI Executive Summary

CVE-2021-22204 is a critical remote code execution vulnerability in ExifTool affecting versions 7.44 and later. Attackers can execute arbitrary code by crafting malicious DjVu image files, exploiting improper input validation. With a CVSS score of 9.0 and publicly available exploits, this vulnerability poses an immediate threat to organizations processing untrusted image files, particularly in document management and content analysis systems.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 20, 2026 01:18
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations in government (NCA, CITC), banking (SAMA-regulated institutions), healthcare (MOH systems), and energy (ARAMCO, SEC) are at significant risk if they process image files through document management systems, content analysis platforms, or automated image processing pipelines. Government agencies handling citizen documents and banking institutions processing customer-submitted images face the highest exposure. Telecom operators (STC, Mobily) using ExifTool for multimedia content analysis are also vulnerable.
🏢 Affected Saudi Sectors
Government (NCA, CITC, Ministry of Interior) Banking and Financial Services (SAMA-regulated) Healthcare (Ministry of Health) Energy (ARAMCO, SEC) Telecommunications (STC, Mobily, Zain) Document Management and Content Analysis Media and Broadcasting
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all systems running ExifTool versions 7.44 through 12.23 using asset inventory and vulnerability scanning
2. Restrict file upload functionality to trusted sources only; implement strict file type validation
3. Disable DjVu file processing if not operationally required
4. Isolate affected systems from production networks if patching cannot be completed immediately

PATCHING:
1. Upgrade ExifTool to version 12.24 or later immediately
2. Verify patch installation: exiftool -ver should show version 12.24+
3. Test patched systems with known-safe image files before returning to production

COMPENSATING CONTROLS (if immediate patching unavailable):
1. Implement input validation: reject DjVu files (.djvu, .djv extensions) at application layer
2. Run ExifTool in sandboxed/containerized environment with minimal privileges
3. Process image files on isolated systems without network access
4. Monitor ExifTool process execution for suspicious child processes

DETECTION:
1. Monitor for ExifTool process spawning shell commands (cmd.exe, /bin/bash, powershell)
2. Alert on DjVu file uploads or processing attempts
3. Log all ExifTool execution with command-line arguments
4. Monitor for unexpected network connections from ExifTool processes
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تقوم بتشغيل ExifTool الإصدارات 7.44 إلى 12.23 باستخدام جرد الأصول والفحص الضعيف
2. تقييد وظيفة تحميل الملفات للمصادر الموثوقة فقط؛ تنفيذ التحقق الصارم من نوع الملف
3. تعطيل معالجة ملفات DjVu إذا لم تكن مطلوبة تشغيلياً
4. عزل الأنظمة المتأثرة عن شبكات الإنتاج إذا لم يتمكن من إكمال التصحيح فوراً

التصحيح:
1. ترقية ExifTool إلى الإصدار 12.24 أو أحدث فوراً
2. التحقق من تثبيت التصحيح: exiftool -ver يجب أن يظهر الإصدار 12.24+
3. اختبار الأنظمة المصححة بملفات صور آمنة معروفة قبل العودة إلى الإنتاج

الضوابط البديلة (إذا لم يكن التصحيح الفوري متاحاً):
1. تنفيذ التحقق من المدخلات: رفض ملفات DjVu على مستوى التطبيق
2. تشغيل ExifTool في بيئة معزولة/حاوية بامتيازات دنيا
3. معالجة ملفات الصور على أنظمة معزولة بدون وصول الشبكة
4. مراقبة تنفيذ عملية ExifTool للعمليات الفرعية المريبة

الكشف:
1. مراقبة عملية ExifTool التي تولد أوامر shell
2. تنبيه محاولات تحميل أو معالجة ملفات DjVu
3. تسجيل جميع عمليات تنفيذ ExifTool مع معاملات سطر الأوامر
4. مراقبة الاتصالات الشبكية غير المتوقعة من عمليات ExifTool
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies and Procedures A.6.1.1 - Organization of Information Security A.12.2.1 - Restrictions on Software Installation A.12.6.1 - Management of Technical Vulnerabilities A.14.2.1 - Secure Development Policy
🔵 SAMA CSF
ID.RA-1 - Asset Management and Inventory PR.IP-12 - Software Development Security DE.CM-8 - Vulnerability Scans RS.MI-2 - Incident Response and Management
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy and procedures A.12.2.1 - Restrictions on software installation A.5.1.1 - Information security policies
🟣 PCI DSS v4.0
6.2 - Security patches and updates 6.5.1 - Injection flaws 11.2 - Vulnerability scanning
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Perl:Exiftool
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS92.76%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2021-12-01
Published 2021-11-17
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
9.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
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