📄 Description (English)
Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to version 1.7.4, a single click on a malicious link gives an unauthenticated attacker immediate, silent control over every active C2 session or beacon, capable of exfiltrating all collected target data (e.g. SSH keys, ntds.dit) or destroying the entire compromised infrastructure, entirely through the operator's own browser. This issue has been patched in version 1.7.4.
🤖 AI Executive Summary
CVE-2026-34227 is a critical authentication bypass vulnerability in Sliver C2 framework versions prior to 1.7.4 that allows unauthenticated attackers to hijack all active command and control sessions through a single malicious link click. This enables complete compromise of operator infrastructure, data exfiltration of sensitive credentials, and destruction of compromised targets. The vulnerability is particularly severe as it affects the operator's own browser and requires minimal user interaction, with exploits already publicly available.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 05:19
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi government cybersecurity operations, intelligence agencies, and advanced threat response teams that may utilize Sliver C2 for authorized penetration testing and red team exercises. High-risk sectors include: (1) Government/NCA — potential compromise of authorized security operations and intelligence gathering infrastructure; (2) Banking/SAMA — if used in authorized security assessments, could expose financial institution security postures; (3) Critical Infrastructure/Energy — compromise of authorized security testing could expose ARAMCO and utility infrastructure assessments; (4) Telecom/STC — potential exposure of network security testing operations. The silent nature of the hijacking and data exfiltration capability makes this particularly dangerous for organizations conducting sensitive security operations.
🏢 Affected Saudi Sectors
Government/National Cybersecurity Authority
Intelligence and Security Services
Banking and Financial Services/SAMA
Critical Infrastructure/Energy (ARAMCO)
Telecommunications/STC
Healthcare
Defense and Military
Cybersecurity Consulting and Penetration Testing Firms
🎯 MITRE ATT&CK Techniques
T1190 - Exploit Public-Facing Application
T1566 - Phishing
T1566.002 - Phishing: Spearphishing Link
T1021 - Remote Services
T1550 - Use Alternate Authentication Material
T1550.004 - Use Alternate Authentication Material: Web Session Cookie
T1040 - Network Sniffing
T1041 - Exfiltration Over C2 Channel
T1020 - Automated Exfiltration
T1537 - Transfer Data to Cloud Account
T1485 - Data Destruction
T1531 - Account Access Removal
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Sliver C2 deployments in your organization and document version numbers
2. Isolate affected Sliver operators and C2 infrastructure from internet access immediately
3. Assume all active C2 sessions and beacons may be compromised; treat as security incident
4. Preserve logs from all Sliver operators for forensic analysis
5. Notify all teams using Sliver of the compromise risk
PATCHING GUIDANCE:
1. Upgrade Sliver to version 1.7.4 or later immediately
2. Before upgrade, backup all C2 session data and beacon information
3. After patching, rotate all operator credentials and authentication tokens
4. Regenerate all implant payloads and redeploy beacons
5. Verify patch installation by checking version in Sliver console
COMPENSATING CONTROLS (if immediate patching not possible):
1. Implement network segmentation — restrict Sliver operator access to isolated network segments
2. Deploy WAF rules to block suspicious requests to Sliver web interface
3. Implement strict browser security policies for operators (disable JavaScript, restrict plugins)
4. Monitor for unauthorized C2 session access using network IDS/IPS
5. Implement multi-factor authentication for all Sliver operator accounts
6. Disable web-based Sliver console access; use CLI only with VPN
DETECTION RULES:
1. Monitor for unexpected HTTP requests to Sliver C2 infrastructure from external sources
2. Alert on multiple simultaneous C2 session access from different IP addresses
3. Monitor for unusual data exfiltration patterns from C2 infrastructure
4. Track failed authentication attempts followed by successful session hijacking
5. Monitor browser access logs for suspicious referrer headers or malicious links
6. Implement network monitoring for unusual Wireguard traffic patterns
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع نشرات Sliver C2 في مؤسستك وقم بتوثيق أرقام الإصدارات
2. عزل مشغلي Sliver المتأثرين وبنية C2 عن الوصول إلى الإنترنت فوراً
3. افترض أن جميع جلسات C2 النشطة والمنارات قد تكون مخترقة؛ تعامل معها كحادثة أمنية
4. احفظ السجلات من جميع مشغلي Sliver للتحليل الجنائي
5. أخطر جميع الفرق التي تستخدم Sliver بمخاطر الاختراق
إرشادات التصحيح:
1. قم بترقية Sliver إلى الإصدار 1.7.4 أو أحدث فوراً
2. قبل الترقية، قم بعمل نسخة احتياطية من جميع بيانات جلسة C2 ومعلومات المنارة
3. بعد التصحيح، قم بتدوير جميع بيانات اعتماد المشغل والرموز المميزة للمصادقة
4. أعد إنشاء جميع حمولات الزرع وأعد نشر المنارات
5. تحقق من تثبيت التصحيح بالتحقق من الإصدار في وحدة تحكم Sliver
الضوابط التعويضية (إذا لم يكن التصحيح الفوري ممكناً):
1. تنفيذ تقسيم الشبكة — تقييد وصول مشغل Sliver إلى قطاعات الشبكة المعزولة
2. نشر قواعد WAF لحظر الطلبات المريبة إلى واجهة ويب Sliver
3. تنفيذ سياسات أمان المتصفح الصارمة للمشغلين (تعطيل JavaScript، تقييد المكونات الإضافية)
4. مراقبة الوصول غير المصرح به إلى جلسة C2 باستخدام IDS/IPS للشبكة
5. تنفيذ المصادقة متعددة العوامل لجميع حسابات مشغل Sliver
6. تعطيل وصول وحدة تحكم Sliver المستندة إلى الويب؛ استخدم CLI فقط مع VPN
قواعد الكشف:
1. مراقبة طلبات HTTP غير المتوقعة إلى بنية C2 من Sliver من مصادر خارجية
2. تنبيه الوصول إلى جلسة C2 المتزامنة من عناوين IP مختلفة
3. مراقبة أنماط تسرب البيانات غير العادية من بنية C2
4. تتبع محاولات المصادقة الفاشلة متبوعة باختراق جلسة ناجح
5. مراقبة سجلات وصول المتصفح للرؤوس المريبة أو الروابط الضارة
6. تنفيذ مراقبة الشبكة لأنماط حركة Wireguard غير العادية
📋 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 access rights management
A.8.1.1 - Audit logging
A.8.2.1 - Protection of log information
A.9.1.1 - Physical and environmental security
A.9.2.1 - Equipment security
A.10.1.1 - Cryptography policy
A.12.1.1 - Operational change management
A.12.2.1 - Restriction of changes to information processing facilities
🔵 SAMA CSF
Governance & Risk Management - Risk Assessment and Management
Information & Cybersecurity - Access Control and Authentication
Information & Cybersecurity - Audit and Accountability
Information & Cybersecurity - Incident Management
Technology & Infrastructure - System and Communications Protection
Technology & Infrastructure - System Monitoring and Defense
🟡 ISO 27001:2022
5.1 - Policies for information security
5.3 - Segregation of duties
6.1 - Screening
6.2 - Terms and conditions of employment
8.1 - User endpoint devices
8.2 - Privileged access rights
8.3 - Information access restriction
8.4 - Access to cryptographic keys
8.5 - Access control
8.6 - Management of secret authentication information
8.7 - Access control for use of cryptographic keys
9.1 - Audit logging
9.2 - Protection of log information
9.4 - Logging of administrator and operator activities
🟣 PCI DSS v4.0.1
Requirement 2 - Default passwords and security parameters
Requirement 6 - Secure development and vulnerability management
Requirement 7 - Restrict access to cardholder data
Requirement 8 - User identification and authentication
Requirement 10 - Logging and monitoring
📦 Affected Products / CPE 1 entries
bishopfox:sliver