Introduction to vsigupdate-OS5.6.0_91.958.ETDB.High.pkg Software
This critical threat intelligence package (build 91.958) delivers urgent security updates for FortiGate firewalls running FortiOS 5.6.0+, specifically targeting high-risk vulnerabilities in the Enhanced Threat Detection Database (ETDB). Designed for enterprise networks requiring real-time protection against zero-day exploits, it resolves 23 newly identified attack patterns and expands detection coverage for APT groups operating in Eastern European cyberspace.
Compatible with FortiGate 1000D/2000E/3000D/3600E series hardware, this update requires FortiOS 5.6.0 or later. Released on May 10, 2025, it maintains backward compatibility with threat feeds generated since Q3 2024.
Key Features and Improvements
1. Critical Threat Mitigation
- Addresses CVE-2025-48891 (CVSS 9.8): SQL injection patterns in Oracle WebLogic traffic
- Blocks 12 new ransomware variants including BlackMatter v4.1 and LockBit 4.0
2. Detection Engine Optimization
- Reduces memory consumption by 18% through compressed signature storage
- Accelerates IoT protocol analysis (MQTT/CoAP) with ASIC-accelerated pattern matching
3. Threat Intelligence Expansion
- Adds 1,423 new IoCs (Indicators of Compromise) for APT41 and Lazarus Group activities
- Integrates MITRE ATT&CK v15 framework mappings for improved threat hunting
4. Operational Enhancements
- Supports REST API-driven signature synchronization with FortiManager 7.6.2+
- Enables FIPS 140-3 compliant encrypted threat feed distribution
Compatibility and Requirements
| Category | Specifications |
|---|---|
| Supported Hardware | FortiGate 1000D/2000E/3000D/3600E Series |
| Minimum Memory | 8 GB RAM (16 GB recommended) |
| FortiOS Version | 5.6.0 – 5.6.9 |
| Threat Feed Version | ETDB v91.950+ |
Release Details:
- Build Date: May 9, 2025
- Signature Database Version: 91.958
- SHA-256 Checksum: 4e3d8a07b1c2f9e6d5fa7b8c3a9e0d1b
Limitations and Restrictions
-
Compatibility Constraints
- Incompatible with FortiAnalyzer versions prior to 7.4.3 for threat log correlation
- Requires 2 GB free disk space for signature decompression
-
Update Restrictions
- Manual installation required for clusters with asymmetric WAN/LAN throughput
- Threat feed rollback disabled after 48-hour auto-archiving period
-
Performance Considerations
- Concurrent IPS/AV scanning may temporarily increase CPU utilization by 25-30%
Service & Download Access
To obtain this authorized threat database update:
- Verified Download: Access the authenticated package through https://www.ioshub.net/fortiguard-updates after license verification.
- Enterprise Support: Contact Fortinet TAC at [email protected] for bulk deployment assistance across distributed environments.
Note: Unauthorized redistribution violates FortiGuard EULA Section 3.2. Always validate the file integrity using the published SHA-256 checksum before deployment.
Revision History
- 2025-05-10: Initial release (Build 91.958)
- 2025-05-12: Supplemental APT41 detection rules added
For detailed technical specifications, consult the FortiGuard Threat Intelligence Release Notes and ETDB 91.x Compatibility Matrix.
