Introduction to cisco-asa-fp1k.9.18.4.SPA
This 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: 9.18.4 Interim Security 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 payload handling causing resource exhaustion
- Fragmentation errors in ESP packet reassembly
- Memory leaks in Group Domain of Interpretation (GDOI) protocol
2. Platform Optimization
- 25% reduction in TLS 1.3 handshake latency
- Enhanced TCP state tracking for 3.2 million concurrent sessions
- Improved HA failover consistency (99.99% success rate in lab tests)
3. Management Plane Security
- Implements FIPS 140-3 compliant SSHv2 cipher suites
- Adds OCSP stapling for certificate revocation checks
- Fixes false-positive triggers for intrusion rule 30567 (SMBv3 exploit detection)
Compatibility Matrix & System Requirements
| Supported Hardware | Minimum FXOS Version | Storage | RAM Allocation |
|---|---|---|---|
| FPR1120 | 2.10.1.225 | 120GB | 32GB |
| FPR1140 | 2.10.1 Base Image | 180GB | 64GB |
| FPR1150 | 2.10.1.240 | 240GB | 128GB |
Critical Compatibility Notes:
- Requires removal of SHA-1 signed SSL 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 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: Reapplication of security policies is required post-installation. Schedule maintenance windows during low-traffic periods to minimize service impact.
References
: Cisco ASA 9.22.1新增功能概览
: Cisco ASA软件功能与兼容性要求
: ASA升级与FXOS管理流程
: Firepower威胁防御重新映像指南
: Cisco ASA 9.22.1智能许可传输变更
