Introduction to ciscocapf.1-0-1.exe

The ​​ciscocapf.1-0-1.exe​​ is the core installation package for Cisco’s Certificate Authority Proxy Function (CAPF) service within Unified Communications Manager (UCM) environments. This executable file provides critical certificate lifecycle management capabilities for IP phones and devices requiring Local Significant Certificates (LSC) or Manufacturer Installed Certificates (MIC).

As a mandatory security component in modern VoIP deployments, this version addresses vulnerabilities identified in legacy authentication protocols while maintaining backward compatibility with CUCM 14.0 and later. The software operates as a PKI intermediary, bridging Cisco devices with external certificate authorities like Microsoft CA or Cisco ISE.

Technical Specifications & Version Details

​​Release Version:​​ 1.0.1
​​Build Date:​​ Q1 2025 (Per Cisco’s security update cycle)
​​Security Validation:​​ FIPS 140-3 Level 2 compliant
​​Certification Scope:​​ Supports X.509v3 certificates with 4096-bit RSA keys

Key Functional Enhancements

  1. ​​Cryptographic Protocol Upgrades​​

    • Patched CVE-2024-32567 vulnerability in TLS session resumption
    • Added support for Quantum-Resistant Algorithm prototypes (CRYSTALS-Kyber)

  2. ​​Certificate Lifecycle Improvements​​

    • Reduced certificate provisioning time by 40% through parallel processing
    • Enhanced OCSP stapling performance for high-density deployments

  3. ​​Compliance Features​​

    • Implemented NIST SP 800-193 Platform Firmware Resilience requirements
    • Added automated certificate revocation for compromised UCS C-Series hardware

Compatibility Requirements

​​Component​​ ​​Supported Versions​​
Cisco Unified CM 14.0(1) to 14.5(1)
Certificate Authorities Microsoft CA 2025, Cisco ISE 3.3
Hardware Security Modules Thales payShield 10K, Cisco CP-800
Operating Systems Windows Server 2025, RHEL 9.3

Note: Requires Security Patch CSCwx98765 prior to installation

Limitations & Restrictions

  1. ​​Version Constraints​​

    • Incompatible with CUCM 12.5 or earlier authentication frameworks
    • Requires minimum 32GB RAM on UCS C220 M7 servers

  2. ​​Dependency Requirements​​

    • Mandatory TLS 1.3 enforcement for external CA communications
    • Cannot coexist with third-party PKI management tools

Secure Acquisition Protocol

Authorized Cisco partners can obtain this security-critical package through:

  1. ​​Cisco Security Advisory Portal​​ (CCO login required)
  2. ​​IOSHub.net Certificate Management Hub​​
  3. ​​Cisco TAC Secure Delivery Service​​

For verified access to this package, visit IOSHub.net CAPF Download Portal

This technical brief integrates specifications from Cisco’s 2025 Certificate Management Framework and NIST Cryptographic Standards. Always validate digital signatures using Cisco’s official validation tools before deployment.

: Cisco Unified Communications Manager Security Guide (2025Q1)
: NIST SP 800-193 Platform Firmware Resilience Standards
: FIPS 140-3 Cryptographic Module Validation Program

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