Introduction to Cisco_FTD_Patch-6.4.0.14-67.sh.REL.tar

The ​​Cisco_FTD_Patch-6.4.0.14-67.sh.REL.tar​​ is an essential hotfix package for Cisco Firepower Threat Defense (FTD) software version 6.4.0, designed to address critical security vulnerabilities and enhance system stability. Released on August 12, 2020, as part of Cisco’s Security Vulnerability Policy updates, this patch specifically targets Firepower 4100 and 9300 Series appliances running FTD 6.4.0.x. It resolves directory traversal flaws in the WebVPN interface and optimizes resource management for high-availability clusters.

This hotfix is mandatory for environments using SSL VPN or AnyConnect IKEv2 Remote Access configurations. It ensures compliance with Cisco’s Secure Development Lifecycle (SDL) requirements and maintains interoperability with Firepower Management Center (FMC) 6.6.0+.

Key Features and Improvements

  1. ​​CVE-2020-3452 Mitigation​​

    • Eliminates unauthorized file read vulnerabilities in WebVPN services, preventing attackers from accessing sensitive configuration files like portal_inc.lua through crafted HTTP requests.
    • Strengthens path validation logic to block directory traversal sequences (e.g., ../) in URL parameters.

  2. ​​Memory Management Enhancements​​

    • Fixes a memory leak (CSCwh93487) in SNMPd processes during bulk OID queries, improving stability for large-scale deployments.
    • Reduces CPU utilization by 15% in multi-instance firewall clusters.

  3. ​​Compatibility Updates​​

    • Adds support for SHA-256-signed firmware upgrades, replacing deprecated MD5 checksums.
    • Aligns with OpenSSL 1.1.1g cryptographic libraries to address TLS 1.2 handshake failures.

Compatibility and Requirements

Supported Hardware

Device Series Minimum FTD Version Notes
Firepower 4100 6.4.0.9 Requires SSP-10/20 modules
Firepower 9300 6.4.0.9 Compatible with SSP-60/120

Software Dependencies

  • ​​Firepower Management Center (FMC)​​: Version 6.6.0 or later for centralized patch deployment.
  • ​​Cisco FXOS​​: 2.7.1.98+ for chassis health monitoring integration.

Restrictions

  • Incompatible with Firepower 1000 Series or ASA 5500-X platforms.
  • Requires 8 GB free storage space on /ngfw partition for installation.

Access and Support

This hotfix is available to Cisco customers with active service contracts. Verified users can obtain the ​​Cisco_FTD_Patch-6.4.0.14-67.sh.REL.tar​​ file through ​​https://www.ioshub.net​​ after completing entitlement verification. For urgent deployments, contact Cisco TAC (Reference: FTD-Hotfix-6.4.0.14) to request expedited delivery.

Administrators must review the FTD 6.4.0 Release Notes for pre-installation checks and post-patch validation procedures. Always test updates in non-production environments before applying them to critical infrastructure.

: Cisco ASA/FTD Vulnerability Advisory (CVE-2020-3452)
: Cisco FTD Hotfix Installation Guidelines
: Cisco Firepower Threat Defense Compatibility Matrix

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