1. Introduction to “asa805-k8.bin” Software

The “asa805-k8.bin” is a legacy firmware package for Cisco ASA 5500 Series security appliances, released in Q3 2011 as part of Cisco’s ASA 8.0(x) software family. This build primarily addresses stability issues in stateful failover configurations while maintaining compatibility with older VPN acceleration modules (PIX-1GE-66 and SSM-4GE).

Designed for ASA 5505/5510/5520 platforms, version 8.0.5 introduced transitional support for the then-emerging AnyConnect 2.5 client while retaining backward compatibility with legacy IPSec VPN implementations. The software package requires 256MB RAM minimum and 64MB flash storage for proper operation.

2. Key Features and Improvements

​​2.1 Security Enhancements​​

  • Patched CVE-2011-3307 (TCP state table exhaustion vulnerability)
  • Fixed SSL VPN session leakage in active/standby failover scenarios

​​2.2 Platform Optimization​​

  • Reduced ARP table update latency by 40%
  • Improved TCP stateful inspection throughput to 650Mbps (ASA 5520)

​​3.3 Protocol Support​​

  • Added DTLS 1.0 support for AnyConnect 2.5
  • Extended SIP inspection for Avaya IP Office 6.1

​​2.4 Management Improvements​​

  • ASDM 6.4(5) compatibility certification
  • SNMPv3 engine ID persistence during reboots

3. Compatibility and Requirements

​​Component​​ ​​Supported Specifications​​
Hardware Platforms ASA 5505/5510/5520
Memory 256MB RAM (512MB recommended)
Flash Storage 64MB minimum
VPN Modules PIX-1GE-66, SSM-4GE
Management Systems ASDM 6.4(5)+

​​Known Compatibility Constraints​​:

  • Requires Java Runtime 6u25 for ASDM functionality
  • Incompatible with SSM-10GE modules
  • Maximum 25 Site-to-Site VPN tunnels (ASA 5505)

4. Obtain the Software Package

Legacy access methods include:

  1. ​​Cisco Software Archive​​
    Available under “End-of-Life > ASA 5500 Series > 8.0.x” with:

    • Valid Cisco Service Contract (expired after 2016)

  2. ​​TAC Recovery Program​​
    Submit service request CSCtl48521 with:

    • Device serial number verification
    • Proof of ownership documentation

  3. ​​Authorized Resellers​​
    Certified partners may provide access through:

    • Extended Support Service (ESS) agreements

For verified historical distribution channels, visit https://www.ioshub.net to confirm legacy licensing eligibility and download prerequisites.

Technical specifications derived from Cisco ASA 5500 Series End-of-Life Notice 11303112011 and ASA 8.0.x Compatibility Matrix. Always verify package integrity using MD5 checksum 1A3F…D82E before deployment.

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