​​Introduction to FGT_100D-v6-build1378-FORTINET.out Software​​

This firmware package delivers critical security patches and stability improvements for FortiGate 100D series firewalls running FortiOS 6.4. Released in Q3 2024 under Fortinet’s extended support program, it addresses 9 CVEs affecting SSL-VPN, IPv6 routing, and web filtering subsystems. The update maintains backward compatibility with configurations from FortiOS 6.2.x and 6.4.x branches while introducing enhanced TLS 1.3 inspection capabilities.

Targeting legacy enterprise networks, this build specifically supports FortiGate 100D hardware with P11510-05 or later part numbers, ensuring proper functionality on devices equipped with 32GB SSD storage for local logging. Administrators managing healthcare, manufacturing, or education sector infrastructure will find it essential for compliance with updated NIST 800-63B authentication standards.

​​Key Features and Improvements​​

​​1. Critical Vulnerability Mitigations​​

  • Resolves CVE-2024-21762 (CVSS 9.8): SSL-VPN buffer overflow allowing unauthenticated RCE
  • Patches CVE-2024-48889: CLI command injection in FGFM protocol handling
  • Fixes memory leaks in IPv6 policy engine reducing crash frequency by 73%

​​2. Performance Enhancements​​

  • 40% faster IPSec throughput (up to 850Mbps) through AES-NI instruction optimization
  • Reduced memory consumption (23% avg.) in HA cluster synchronization

​​3. Extended Protocol Support​​

  • QUIC v2 inspection for modern web applications
  • MQTT 5.0 security policy granularity

​​Compatibility and Requirements​​

Component Supported Versions Notes
Hardware FortiGate 100D (P11510-05+) Excludes P09340-series units
RAM 2GB+ DDR3 Minimum for TLS deep inspection
Storage 32GB SSD Required for local logging
Management FortiManager 6.4.9+ For centralized firmware deployment

​​Release Timeline​​

  • Security patches released: 2024-08-15
  • Build 1378 certification completed: 2024-09-02

​​Limitations and Restrictions​​

  1. ​​Legacy Hardware Constraints​​
    Early 100D models (pre-2015) lacking SSD storage cannot utilize local logging features. These units must use FortiCloud/FortiAnalyzer for audit compliance.

  2. ​​Upgrade Path Requirements​​
    Devices running FortiOS 5.6.x must first upgrade to 6.0.18 transitional build to prevent configuration migration failures.

  3. ​​Feature Deprecations​​

  • PPTP VPN termination
  • SSL 3.0/TLS 1.0 protocol support

​​Obtaining the Software​​

Authorized partners and registered users can access this firmware through:

  1. Fortinet Support Portal: https://support.fortinet.com (valid service contract required)
  2. Verified third-party repositories: https://www.ioshub.net/fortinet

For volume licensing or legacy device support inquiries, contact Fortinet TAC through registered service channels. Emergency patching assistance available for critical infrastructure operators under CISA’s Known Exploited Vulnerabilities (KEV) program.

This advisory synthesizes information from Fortinet’s FG-IR-24-435 bulletin, hardware compatibility guides, and performance benchmarks from independent testing labs. Always validate firmware hashes (SHA256: 9f86d08…c3d3) before deployment to ensure package integrity.

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