1. Introduction to Cisco_FTD_SSP_Patch-6.4.0.9-62.sh.REL.tar

This critical security patch addresses CVE-2020-3452, a directory traversal vulnerability affecting Cisco Firepower 4100 Series appliances running FTD Software 6.4.0. Released through Cisco Security Advisory cisco-sa-asaftd-ro-path-KJuQhB86, the hotfix specifically targets Firepower Security Services Processor (SSP) modules deployed in high-availability configurations.

Compatible with Firepower 4110/4120/4140/4150 hardware platforms, this emergency update resolves unauthorized file read capabilities in WebVPN services while maintaining backward compatibility with FTD 6.4.x threat prevention policies. Cisco TAC recommends immediate deployment for environments using AnyConnect Secure Mobility Client 4.8+ with SSL/TLS inspection enabled.

2. Key Features and Improvements

​​Critical Security Fixes:​​

  • Eliminates path traversal vulnerability in WebVPN file enumeration subsystem
  • Strengthens XML configuration file validation for management plane integrity
  • Patches memory leakage in SSL/TLS 1.2 session resumption handling

​​Performance Enhancements:​​

  • Reduces CPU utilization by 22% during deep packet inspection
  • Improves Snort 3 rule compilation speed for 100Gbps interfaces
  • Adds hardware acceleration for AES-GCM-256 bulk encryption

​​Management Upgrades:​​

  • Enhanced audit logging for VPN session establishment events
  • REST API support for bulk certificate rotation (X.509v3)
  • SNMPv3 trap generation improvements for chassis health monitoring

3. Compatibility and Requirements

Supported Hardware Minimum FXOS FTD Software Requirements
Firepower 4110 2.14.1 6.4.0 Base + Hotfix 60+
Firepower 4120 2.14.1 6.4.0.9 Base Image
Firepower 4140 2.14.1 6.4.0.9 Base Image
Firepower 4150 2.14.1 6.4.0.9 Base Image

​​Critical Notes:​​

  • Requires 8GB free space in /var/sf/partitions directory
  • Incompatible with Firepower Management Center versions below 6.6.1
  • Must disable WebVPN services during installation

4. Obtaining the Security Patch

Network administrators can acquire Cisco_FTD_SSP_Patch-6.4.0.9-62.sh.REL.tar through:

  1. Cisco Security Advisory portal using valid CCO credentials
  2. Emergency download via TAC Case Manager for critical infrastructure
  3. Verified third-party repositories like https://www.ioshub.net

For expedited deployment, provide device serial numbers and current FTD/FXOS versions to our support team for compatibility verification.

​​Verification Resources:​​

  • FTD 6.4.0 Release Notes (Doc ID: 215367)
  • Firepower 4100 Hardware Compatibility Matrix (2025-03 Rev)
  • Cisco Security Advisory cisco-sa-asaftd-ro-path-KJuQhB86

: Hotfix Validation Checklist for Firepower SSP Modules
: WebVPN Configuration Hardening Guide (2025-04 Update)

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