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CVE-2016-3427

Critical 🇺🇸 CISA KEV ⚡ Exploit Available

                    Published: May 12, 2023                                          ·  Source: CISA_KEV                

CVSS v3

9.0

🔗 NVD Official

📄 Description (English)

Oracle Java SE and JRockit Unspecified Vulnerability — Oracle Java SE and JRockit contains an unspecified vulnerability that allows remote attackers to affect confidentiality, integrity, and availability via vectors related to Java Management Extensions (JMX). This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service.

🤖 AI Executive Summary

CVE-2016-3427 is a critical unspecified vulnerability in Oracle Java SE and JRockit's Java Management Extensions (JMX) component with a CVSS score of 9.0. It allows remote attackers to compromise confidentiality, integrity, and availability without authentication, exploitable through sandboxed Java applets, Java Web Start applications, or directly via web service APIs. This vulnerability has known exploits in the wild and has been actively leveraged by threat actors, making it extremely urgent to patch. Despite being from 2016, unpatched Java installations remain prevalent across enterprise environments, posing ongoing risk.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 5, 2026 15:01

🇸🇦 Saudi Arabia Impact Assessment

This vulnerability poses significant risk to Saudi organizations across all sectors due to the ubiquity of Java in enterprise environments. Banking sector (SAMA-regulated institutions) running legacy Java-based core banking systems and payment gateways are at high risk. Government entities under NCA oversight using Java-based e-government platforms and internal applications are vulnerable. Energy sector organizations including ARAMCO and utilities running Java-based SCADA management interfaces and industrial control system dashboards face potential compromise. Telecom providers (STC, Mobily, Zain) with Java-based network management systems are also exposed. Healthcare systems using Java-based electronic health record systems could be targeted. The availability of public exploits combined with the prevalence of unpatched legacy Java installations in Saudi infrastructure significantly elevates the risk.

🏢 Affected Saudi Sectors

Banking Government Energy Telecommunications Healthcare Education Retail Defense

⚖️ Saudi Risk Score (AI)

8.5

/ 10.0

🔧 Remediation Steps (English)

Immediate Actions:

1. Identify all Oracle Java SE and JRockit installations across the environment using asset inventory tools

2. Apply Oracle Critical Patch Update (CPU) from April 2016 or later — update to the latest supported Java version immediately

3. For Java SE, upgrade to at least JDK 8u91/8u92 or later; for JDK 7, upgrade to 7u101 or later; for JDK 6, upgrade to 6u115 or later



Compensating Controls:

4. Disable Java browser plugins and Java Web Start if not required

5. Restrict JMX access using firewall rules — block JMX ports (default 1099, custom RMI ports) from external access

6. Enable JMX authentication and SSL/TLS encryption on all JMX endpoints

7. Implement network segmentation to isolate systems running legacy Java versions

8. Deploy Web Application Firewall (WAF) rules to filter malicious JMX-related traffic



Detection Rules:

9. Monitor for unusual JMX connection attempts on ports 1099 and custom RMI ports

10. Create IDS/IPS signatures for known CVE-2016-3427 exploit patterns

11. Monitor Java process behavior for anomalous child process spawning or network connections

12. Review logs for unauthorized RMI registry access attempts

🔧 خطوات المعالجة (العربية)

الإجراءات الفورية:

1. تحديد جميع تثبيتات Oracle Java SE و JRockit في البيئة باستخدام أدوات جرد الأصول

2. تطبيق تحديث التصحيح الحرج من Oracle من أبريل 2016 أو أحدث — التحديث إلى أحدث إصدار مدعوم من Java فوراً

3. لـ Java SE، الترقية إلى JDK 8u91/8u92 على الأقل أو أحدث؛ لـ JDK 7 الترقية إلى 7u101 أو أحدث؛ لـ JDK 6 الترقية إلى 6u115 أو أحدث

الضوابط التعويضية:

4. تعطيل إضافات Java في المتصفح و Java Web Start إذا لم تكن مطلوبة

5. تقييد الوصول إلى JMX باستخدام قواعد جدار الحماية — حظر منافذ JMX (الافتراضي 1099 ومنافذ RMI المخصصة) من الوصول الخارجي

6. تفعيل المصادقة وتشفير SSL/TLS على جميع نقاط نهاية JMX

7. تنفيذ تجزئة الشبكة لعزل الأنظمة التي تعمل بإصدارات Java القديمة

8. نشر قواعد جدار حماية تطبيقات الويب لتصفية حركة المرور الضارة المتعلقة بـ JMX

قواعد الكشف:

9. مراقبة محاولات اتصال JMX غير العادية على المنافذ 1099 ومنافذ RMI المخصصة

10. إنشاء توقيعات IDS/IPS لأنماط استغلال CVE-2016-3427 المعروفة

11. مراقبة سلوك عمليات Java للكشف عن إنشاء عمليات فرعية غير طبيعية أو اتصالات شبكة مشبوهة

12. مراجعة السجلات للكشف عن محاولات الوصول غير المصرح بها إلى سجل RMI

📋 Regulatory Compliance Mapping

🟢 NCA ECC 2024

2-3-1 (Patch Management) 2-5-1 (Vulnerability Management) 2-2-1 (Asset Management) 2-6-1 (Network Security) 2-9-1 (Security Monitoring)

🔵 SAMA CSF

3.3.3 (Patch Management) 3.3.5 (Vulnerability Management) 3.3.4 (Secure Configuration) 3.4.1 (Network Security Management) 3.3.7 (Security Event Monitoring)

🟡 ISO 27001:2022

A.8.8 (Management of technical vulnerabilities) A.8.9 (Configuration management) A.8.20 (Networks security) A.8.21 (Security of network services) A.8.16 (Monitoring activities)

🟣 PCI DSS v4.0

6.3.3 (Install critical security patches within one month) 6.2 (Develop software securely) 11.3 (Penetration testing) 2.2 (Configuration standards) 10.6 (Review logs)

🔗 References & Sources 0

No references.

📦 Affected Products / CPE 1 entries

Oracle:Java SE and JRockit

📊 CVSS Score

9.0

/ 10.0 — Critical

📋 Quick Facts

Severity Critical

CVSS Score9.0

EPSS93.62%

Exploit ✓ Yes

Patch ✓ Yes

CISA KEV🇺🇸 Yes

KEV Due Date2023-06-02

Published 2023-05-12

Source Feed cisa_kev

🇸🇦 Saudi Risk Score

8.5

/ 10.0 — Saudi Risk

🏷️ Tags

kev actively-exploited

⚡ Actions

🔗 NVD Official Page ⚡ Exploit-DB Search 🐙 GitHub PoC Search 🎯 MITRE ATT&CK 📊 CVE Details

CVE-2016-3427

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