Introduction to ciscocm.enable-sha512sum-2021-signing-key-v1.0.cop.sgn Software

The ​​ciscocm.enable-sha512sum-2021-signing-key-v1.0.cop.sgn​​ is a cryptographic enhancement package developed under Cisco’s Secure Boot Compliance Initiative to enforce SHA-512 module signing across Cisco Collaboration Manager 12.5.x platforms. Designed for enterprises requiring FIPS 140-3 Level 2 validation, this software implements RFC 8032-compliant EdDSA signatures while maintaining backward compatibility with legacy SHA-256 signed modules in Unified Communications Manager (CUCM) and Unity Connection deployments.

Validated against NIST SP 800-131A Rev.3 standards, this release introduces X.509v3 certificate chain verification for third-party drivers and integrates with Cisco’s Trustworthy Digital Infrastructure framework. Certified for use with Cisco UCS C220 M7 servers running RHEL 9.4 and VMware ESXi 8.0U2+, it addresses CVE-2024-21894 vulnerabilities related to weak hash algorithm implementations in device firmware.

Key Features and Improvements

  1. ​​Cryptographic Standardization​​

    • Enforces SHA-512/256 hashing for all kernel module signatures
    • Generates 4096-bit RSA key pairs via OpenSSL 3.0.12 FIPS provider
    • Implements RFC 3161 timestamping for audit trail compliance

  2. ​​Security Enhancements​​

    • Resolves CVE-2024-5321 buffer overflow risks in legacy SHA-1 signature verification
    • Enables FIPS 140-3 Level 2 validation through NIST-certified cryptographic modules

  3. ​​Performance Optimization​​

    • Reduces signature verification latency by 40% via parallelized hash computation
    • Supports hardware security modules (HSMs) with PKCS#11 v3.0 interface

Compatibility and Requirements

​​Component​​ ​​Supported Versions​​
Collaboration Manager 12.5(1), 12.5(3), 12.5(SU4)
Security Appliances Firepower 1150, ISR 4461
Operating Systems RHEL 9.4+, CentOS Stream 11
Virtualization Platforms VMware ESXi 8.0U2+, KVM 3.1+

⚠️ ​​Known Limitations​​:

  • Incompatible with CUCM 11.x environments using SHA-1 signatures
  • Requires 1.2 GB storage for cryptographic key repository

Accessing the Software Package

Authorized Cisco partners with active Smart Licensing agreements can obtain ​​ciscocm.enable-sha512sum-2021-signing-key-v1.0.cop.sgn​​ through Cisco’s Secure Software Repository:

  1. Visit https://www.ioshub.net/cisco-crypto-signing
  2. Authenticate using Cisco Smart Account credentials
  3. Select “SHA-512 Signing Enablement” from Cryptographic Tools catalog

For defense sector deployments requiring air-gapped installations, submit a TAC service request with authorization code “CSCwh88206”.

This technical overview aligns with Cisco’s Cryptographic Services 12.5.x Release Notes (Document ID: 78-24567-17) and FIPS Implementation Guide v9.3. System administrators must validate ECDSA-SHA-512 signatures (Key ID: 0x9C4A3B1F) post-download and conduct regression testing in isolated environments.

​​Tags​​:
《Cisco SHA-512 Signing Support[]@replace=10001)》, 《Enterprise Communication Securiy Compliance》

References

: Linux kernel module signing standards and SHA-512 implementation guidelines
: Cryptographic vulnerability mitigation strategies for enterprise systems

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