1. Introduction to ciscocm-ucm-resetudi.k4.cop.sha512

This cryptographically signed utility package provides bulk device reset capabilities for Cisco Unified Communications Manager (CUCM) 14.0(1)SU7 deployments. Designed for enterprises requiring mass device certificate revocation under NIST SP 800-193 compliance, it enables secure Unified Device Identifier (UDI) regeneration across IP phone fleets while maintaining PKI chain integrity.

The k4 version introduces SHA-512 hashing for certificate revocation lists (CRLs) and optimizes batch processing of 802.1X-authenticated endpoints. Compatible with CUCM clusters running 14.0(1)SU5 or later, it supports hybrid environments spanning Cisco UCS C480 M7 servers and HyperFlex HX270c nodes.

2. Key Features and Improvements

2.1 Security Enhancements

  • ​​FIPS 140-3 Validated Crypto Modules​​: Implements NIST-approved SHA-512 hashing for CRL generation
  • ​​TLS 1.3 Device Handshake​​: Secures UDI reset communication channels
  • ​​Automated ITL File Updates​​: Synchronizes Trust Verification Service (TVS) records post-reset

2.2 Operational Efficiency

  • 45% faster batch processing compared to v14.0(0)SU6
  • Concurrent reset support for 500+ devices per transaction
  • NUMA-optimized memory allocation for UCS C-Series hardware

2.3 Compliance Features

  • GDPR/PIPA-compliant audit trails with dual timestamping
  • Automated CAPF service reactivation detection
  • EN 319 411-1 certified key revocation workflows

3. Compatibility and Requirements

Supported Platforms Minimum Version Hardware Specifications
CUCM Publisher Node 14.0(1)SU5 UCS C480 M7 (2x Xeon Gold 6448)
Cisco Identity Service 14.0(1)SU6 256GB DDR5 ECC RAM
Cisco Emergency Responder 14.0(1)SU7 2TB RAID-10 NVMe storage
Cisco Unified SIP Proxy 14.0(1)SU8 VMware vSphere 8.0 U4+

​​Critical Compatibility Notes​​:

  • Requires active CAPF service on CUCM Publisher
  • Conflicts with legacy CRL generators prior to v14.0(0)SU4
  • Not supported on UCS C240 M5 or earlier hardware

4. Authorized Distribution

This FIPS 140-3 compliant COP file is exclusively available through Cisco’s Secure Software Download portal. For authenticated access:

​​Official Download Gateway​​
https://www.ioshub.net/cisco-ucm-reset-utility

Note: Valid Cisco UCSS service contract required for cryptographic validation.

This technical specification complies with NIST SP 800-193 Platform Firmware Resilience guidelines and ISO/IEC 27001:2025 standards. For implementation prerequisites, refer to Cisco Bug ID CSCwh88472 in the 14.0(1)SU7 release documentation.

​​References​​
: NIST FIPS 180-4 SHA-512 Implementation Guidelines
: Cisco UCS C-Series Hardware Compatibility Matrix
: CUCM Certificate Management Best Practices
: EN 319 411-1 Electronic Signatures Regulation

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