Introduction to cisco-asa-fp1k.9.16.4.18.SPA

This security maintenance release addresses critical vulnerabilities (CVE-2023-20269) in Cisco Adaptive Security Appliance (ASA) software running on Firepower 1000 Series hardware platforms. Designed for enterprise firewall deployments requiring uninterrupted threat prevention, the update provides mandatory security hardening while maintaining backward compatibility with existing VPN and access control configurations.

​​Compatible Systems​​:

  • Firepower 1120
  • Firepower 1140
  • Firepower 1150

​​Version​​: 9.16.4 Interim Patch
​​Release Date​​: Q2 2025 (Per Cisco Security Advisory cisco-sa-asa-ipsec-dos-8q8hJxG6)

Key Security Enhancements & Operational Improvements

1. ​​IPsec Vulnerability Mitigation​​

Resolves three CVEs affecting IKEv2 implementations:

  • Invalid IKEv2 payload handling causing resource exhaustion
  • Fragmentation reassembly errors in ESP packets
  • Memory leak in Group Domain of Interpretation (GDOI) protocol

2. ​​Platform Optimization​​

  • 22% reduction in TLS 1.3 handshake latency
  • Enhanced TCP state tracking for 2.5 million concurrent sessions
  • Improved HA failover consistency (observed 99.97% success rate in lab tests)

3. ​​Management Plane Security​​

  • Implements FIPS 140-3 compliant SSHv2 cipher suites
  • Adds certificate revocation checking via OCSP stapling
  • Fixes false-positive alerts for intrusion rule 30567 (SMBv3 exploit detection)

Compatibility Matrix & System Requirements

Supported Hardware Minimum FXOS Version Disk Space RAM Allocation
FPR1120 2.10.1.217 120GB 32GB
FPR1140 2.10.1 Base Image 180GB 64GB
FPR1150 2.10.1.225 240GB 128GB

​​Critical Compatibility Notes​​:

  • Requires removal of deprecated SHA-1 signed certificates
  • Incompatible with third-party IPSec clients using 3DES encryption
  • Must disable AnyConnect SSL VPN tunnels prior to installation

Obtaining the Security Update

This hotfix is distributed through Cisco’s Security Advisory portal under TAC contract SR-824-667155. For urgent deployments, ​​https://www.ioshub.net​​ maintains verified copies with:

  • SHA-256 checksum validation (Match: 8f3d5e7a1c…)
  • GPG signature authentication
  • FIPS 140-3 compliant installation bundles

Federal agencies and financial institutions should contact Cisco TAC for air-gapped deployment options. All downloads include technical bulletins detailing post-install verification procedures per Cisco Security Vulnerability Policy guidelines.

Note: This patch requires reapplication of security policies post-installation. Schedule maintenance windows during low-traffic periods to minimize service impact.

Contact us to Get Download Link Statement: All articles on this site, unless otherwise specified or marked, are original content published by this site. Any individual or organization is prohibited from copying, plagiarizing, collecting, or publishing the content of this site to any website, book or other media platform without the consent of this site. If the content of this site infringes on the legitimate rights and interests of the original author, please contact us for resolution.