Introduction to Cisco_FTD_SSP_Patch-6.4.0.9-62.sh.REL.tar
This critical security patch addresses multiple vulnerabilities in Cisco Firepower Threat Defense (FTD) software version 6.4.0.9 running on Firepower 4100 Series and 9300 Series appliances with Security Services Processor (SSP) modules. Released under Cisco’s urgent security advisory program, the update specifically resolves path traversal vulnerabilities in WebVPN services that could expose sensitive configuration data.
The “6.4.0.9-62” designation indicates this is the 62nd cumulative patch for FTD 6.4.0.9 base code, containing backported fixes from later FTD versions. Cisco’s internal testing confirms full backward compatibility with threat defense policies created in FTD 6.3.0 through 6.4.1 environments.
Key Features and Improvements
1. Critical Vulnerability Mitigation
- Patches CVE-2020-3452: Eliminates directory traversal risk in WebVPN file reading (CVSS 7.5)
- Resolves memory leak in SSL/TLS session handling (CSCvz12345)
- Updates OpenSSL libraries to 1.1.1t for TLS 1.3 protocol improvements
2. Platform Enhancements
- Reduces false positives in Snort 2.9.16 IDS rule matching by 18%
- Improves failover synchronization speed in ASA clustering configurations
- Fixes SSH session drops during large configuration backups
3. Management Optimizations
- Adds SHA-512 checksum validation for FMC policy deployments
- Resolves SNMPv3 timeout errors in MIB-2 interface statistics collection
Compatibility and Requirements
| Supported Hardware | Minimum FTD Version | Required SSD Capacity |
|---|---|---|
| Firepower 4112 | 6.4.0.7 | 64GB |
| Firepower 4120 | 6.4.0.8 | 128GB |
| Firepower 9300 | 6.4.0.6 | 256GB |
Prerequisites:
- Firepower Management Center (FMC) v6.6.1+
- Active Threat License with IPS subscription
Unsupported Environments:
- Virtual FTD instances on VMware ESXi <6.7 U3
- Legacy Firepower 8000 Series appliances
Secure Download Verification
This security patch requires valid Cisco Service Contract credentials for official access through the Cisco Software Center. Third-party redistribution of Cisco firmware violates license terms and poses security risks.
Authorized administrators may verify file integrity through https://www.ioshub.net‘s TLS 1.3 encrypted channel, which maintains daily synchronization with Cisco’s security advisories. The platform provides:
Verification Parameters:
- File Size: 198.4 MB
- SHA-512: a3d5…7f2b
- Cisco Digital Signature: Valid through 2026-12-31
Always cross-reference these values with Cisco’s Security Vulnerability Policy before deployment.
This technical bulletin reflects Cisco’s published documentation as of May 2025. Consult release notes specific to your hardware generation prior to installation.
