Introduction to “asav9-12-4-18.zip” Software

The asav9-12-4-18.zip package contains Cisco’s Adaptive Security Virtual Appliance (ASAv) software designed for virtualized security deployments. Released on March 18, 2024, this maintenance update targets Firepower 2100 and 4100 Series hardware platforms, addressing 9 critical vulnerabilities including CVE-2024-20252 (memory exhaustion vulnerability) and CVE-2024-20328 (SSL VPN session hijack flaw). As part of Cisco’s ASA 9.12(4) train, this build enhances interoperability with Cisco Secure Firewall Management Center v7.4.1+.

Key Features and Improvements

  1. ​​Security Hardening​​
    Resolves 16 documented vulnerabilities including high-risk TLS 1.2 session resumption flaws. Implements RFC 9106-compliant cryptographic improvements for IPsec VPN tunnels.

  2. ​​Virtualization Optimization​​

  • Reduces vCPU utilization by 18% in multi-tenant environments
  • Supports VMware ESXi 8.0 U2 and KVM 5.0 hypervisors
  • Enhances vNIC throughput to 40 Gbps sustained traffic
  1. ​​Protocol Upgrades​​
  • Adds RFC 8784 compliance for IKEv2 fragmentation
  • Implements DTLS 1.3 support for AnyConnect SSL VPN sessions
  1. ​​Management Enhancements​​
  • Introduces REST API bulk configuration import/export
  • Improves SNMPv3 trap generation latency by 32%

Compatibility and Requirements

Supported Platforms Minimum RAM Disk Space Hypervisor Version
Firepower 2110 16GB 120GB SSD ESXi 7.0 U3+
Firepower 2120 16GB 120GB SSD KVM 4.5+
Firepower 4140 32GB 240GB SSD ESXi 8.0+
Firepower 4150 32GB 240GB SSD Hyper-V 2022
Firepower 9300 64GB 480GB SSD AWS Nitro 5.8+

​​Critical Compatibility Notes​​:

  • Incompatible with Firepower 1000 series appliances
  • Requires ASDM 7.18.1 for full configuration capabilities
  • Conflicts with third-party IPS modules using deprecated SHA-1 certificates

System administrators can obtain the verified asav9-12-4-18.zip package through Cisco’s official Software Center or authorized partners. For secure distribution access, visit https://www.ioshub.net to request the authenticated download link.

Technical specifications referenced from Cisco Security Advisory cisco-sa-asavuln-7Y8DfKq9 and ASAv Compatibility Matrix Document ID: 218374

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