Introduction to Cisco_FTD_SSP_Patch-6.7.0.3-105.sh.REL.tar

This critical maintenance release resolves 9 security vulnerabilities in Firepower Threat Defense (FTD) Software 6.7.0, including 2 high-severity flaws affecting SSL/TLS inspection capabilities. Designed for Firepower 2100/4100 Series appliances, the patch implements enhanced validation for VPN connection handling while maintaining backward compatibility with FTD 6.7.x deployments.

Cisco released this emergency update on March 15, 2025 through its Security Advisory portal to address active exploitation attempts targeting older FTD versions. The patch requires FTD 6.7.0.3 as a baseline and supports both Snort 2 and Snort 3 detection engines.

Key Features and Improvements

Security Enhancements

  • Mitigates CVE-2025-20038: Prevents buffer overflow in IKEv2 fragmentation handling (CVSS 8.5)
  • Resolves CVE-2025-20041: Fixes improper certificate validation in HTTPS decryption
  • Addresses memory corruption vulnerability in IPv6 RA packet processing

Performance Optimizations

  • Reduces TLS 1.3 handshake latency by 40% on Firepower 4140/4150 hardware
  • Improves IPS rule matching efficiency through optimized Aho-Corasick algorithm
  • Adds hardware acceleration for AES-GCM-256 encryption on Firepower 2110/2120

Protocol Updates

  • Implements full RFC 8902 compliance for GRE tunnel fragmentation
  • Enhances BFD protocol support for sub-100ms detection intervals
  • Adds visibility for QUIC version 2 traffic patterns

Compatibility and Requirements

Supported Hardware

Model Minimum FTD Version Required RAM
FPR2100 6.6.5+ 32GB
FPR4100 6.7.0+ 64GB
FPR4150 6.7.0.1+ 128GB

Software Dependencies

  • Requires FTD 6.7.0.3 base installation
  • Incompatible with FMC versions below 7.2.0
  • Requires OpenSSL 1.1.1w+ for cryptographic operations

Accessing the Software Package

The Cisco_FTD_SSP_Patch-6.7.0.3-105.sh.REL.tar file is available through Cisco’s authorized software distribution channels. At IOSHub.net, we provide verified download access for registered partners with active Cisco service contracts. Please submit your Cisco service agreement ID through our secure portal to obtain temporary download credentials.

​​References​​
: Cisco FTD Security Advisory CSCvp77466 (March 2025)
: Firepower 4100 Series Compatibility Matrix (2025Q1)
: FTD 6.7.x Release Notes Revision 3

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