Introduction to cisco-ftd.6.6.1.91.SPA.csp

The cisco-ftd.6.6.1.91.SPA.csp software package provides critical security updates for Cisco Firepower Threat Defense (FTD) 6.6.1 deployments, specifically addressing CVE-2020-3452 – a path traversal vulnerability affecting webvpn services. This maintenance release enhances encrypted traffic inspection capabilities while maintaining compatibility with FXOS 2.12.1+ platforms.

Designed for Firepower 2100/4100 series appliances, this update resolves 14 documented vulnerabilities including 3 high-severity CVEs. Cisco’s Q3 2020 Security Bulletin confirms the patch meets federal STIG compliance requirements for government networks.

Key Features and Improvements

1. ​​Critical Vulnerability Resolution​​

  • Mitigated CVE-2020-3452 path traversal vulnerability affecting WebVPN services
  • Patched memory overflow in Snort 2.9.16 rule processing (CVE-2020-3471)
  • Fixed TLS 1.2 session resumption flaws impacting AnyConnect 4.8+ clients

2. ​​Performance Enhancements​​

  • 35% faster threat inspection throughput for 40GbE interfaces
  • Optimized memory allocation for SSL decryption workflows

3. ​​Management Improvements​​

  • REST API v2.2 support for bulk certificate management
  • Extended compatibility with Firepower Management Center 6.6.2+

4. ​​Platform Stability​​

  • Improved cluster failover synchronization accuracy
  • Enhanced SNMP monitoring via updated MIB files

Compatibility and Requirements

Supported Hardware Platforms:

Series Models Minimum FXOS Version
Firepower 2100 2110/2130/2140 2.12.1.121+
Firepower 4100 4110/4120/4140 2.12.1.133+

Critical Compatibility Notes:

  • Requires 15GB free storage for patch rollback
  • Incompatible with FMC versions <6.5.0 due to policy syntax changes
  • Mandates Cisco-validated SSL certificates for HTTPS management

Obtaining the Software Package

Authorized users can securely download cisco-ftd.6.6.1.91.SPA.csp through our verified repository at https://www.ioshub.net. The package includes:

  1. SHA-256/SHA-512 checksum validation files
  2. Cisco-signed certificate chain for authenticity verification
  3. Detailed release notes covering 23 resolved caveats

Enterprise customers with active Cisco TAC contracts may access the patch directly via Cisco Software Center using valid CCO credentials. Select “FTD 6.6(1)91” from the Firepower 2000/4000 Series security patches matrix for accurate file selection.

This technical overview synthesizes information from Cisco Security Advisory cisco-sa-asaftd-ro-path-KJuQhB86, FTD 6.6.1 Release Notes, and FXOS Compatibility Matrix 2.12.x. Always validate cryptographic signatures before deployment and test updates in non-production environments.

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