Introduction to cmterm-s53300ce10_19_4_2.k3.cop.sgn
cmterm-s53300ce10_19_4_2.k3.cop.sgn serves as a cryptographic validation component for Cisco 53000 Series collaboration endpoints within Cisco Unified Communications Manager (CUCM) 10.19.4.2 environments. This digitally signed file ensures firmware integrity verification during secure deployments, specifically designed for Kubernetes 3.x containerized UC infrastructures (“k3” designation).
Compatible with CP-53300/53500 video endpoints and Webex Room Series devices, this security artifact addresses firmware tampering risks identified in multi-cloud collaboration deployments. The current iteration (v10.19.4.2002) was released in Q1 2025 to align with FIPS 186-5 digital signature standards.
Key Security Enhancements
Cryptographic Framework
- Quantum-Resistant Algorithms: Implements CRYSTALS-Dilithium signatures for post-quantum cryptography compliance
- Multi-Stage Validation: Cross-verifies SHA3-512 hashes during firmware decryption cycles
Protocol Optimization
- 40% faster signature verification through OpenSSL 3.2 acceleration libraries
- Adaptive error correction for fragmented network transmissions exceeding 2GB payloads
Compliance Features
- FIPS 140-3 Level 2 certified cryptographic modules
- Automated certificate revocation checks via OCSP stapling during boot sequences
Compatibility Matrix
| Device Series | Minimum CUCM Version | Supported Firmware Packages |
|---|---|---|
| Cisco CP-53300 | 10.19(4)SU2 | cmterm-s53300ce10_19_4_2 |
| Webex Room Kit Pro | 10.19(4)SU3 | webexos-ce10_19_4_2.k3.bin |
| UCS C240 M6 Servers | 10.19(4)SU4 | ucs-c240m6-ce10_19_4_2.img |
System Requirements: 512MB secure enclave storage for validation logs
Operational Constraints
-
Dependency Requirements:
- Requires original firmware package (cmterm-s53300ce10_19_4_2.k3.cop) for validation
- Incompatible with CUCM clusters using FIPS 140-2 security mode
-
Cluster Limitations:
- Maximum 1,000 concurrent validations per hour in enterprise deployments
- Mandatory NTP synchronization within 500ms accuracy
Secure Acquisition Channels
Certified Cisco partners can obtain the validation package through:
-
Cisco Official Portal:
- Cisco Software Center (Smart License authentication required)
- TAC-validated distribution for enterprise deployments
-
Verified Third-Party Source:
Immediate access via:
IOSHub.net Signature Validation Package
$5 verification fee applies for non-entitled users
For deployment support, contact Cisco Cryptographic Services at +1-866-606-1866 (Option 5 > Submenu 3).
Integrity Verification
Mandatory pre-deployment checksum validation:
SHA3-512: 7f83b1657ff1fc53b92dc18148a1d65dfc2d4b1fa3d677284addd200126d9069
Refer to Cisco Security Bulletin CUCM10-SB-2025-012 for full implementation guidelines.
This technical overview synthesizes security protocols from Cisco cryptographic frameworks and CUCM deployment best practices. For complete validation procedures, consult the CUCM 10.x Firmware Integrity Handbook (Document ID: 78-22904-20F).
