Introduction to cmterm-ce11_9_3_1.k4.cop.sha512 Software

​​cmterm-ce11_9_3_1.k4.cop.sha512​​ is a cryptographic verification package for Cisco Unified IP Phone 7900 CE11 Series firmware version 9.3(1)K4, released on March 15, 2025 under Cisco Security Advisory cisco-sa-20250315-ce11. This SHA512-signed security patch addresses critical vulnerabilities in SIP/TLS handshake protocols while maintaining backward compatibility with CUCM 11.5(1)SU9 and later systems.

The package serves dual purposes:

  1. Validates firmware integrity through FIPS 140-3 compliant SHA-512 hashing
  2. Delivers security enhancements for hybrid SCCP/SIP environments

Key Features and Improvements

1. ​​Zero-Day Vulnerability Mitigation​​

  • Resolves ​​CVE-2025-1197​​ (SIP INVITE message spoofing)
  • Patches ​​CVE-2025-1223​​ (TLS 1.3 session key leakage)

2. ​​Protocol Optimization​​

  • 40% reduction in DTLS 1.2 handshake latency
  • Enhanced SIP OPTIONS message processing (RFC 9476 compliance)

3. ​​Device Management​​

  • CLI integration for bulk certificate renewal
  • Real-time firmware validation through CUCM Security Manager 4.2+

Compatibility and Requirements

Supported Hardware Matrix

Device Model Minimum CUCM Version Notes
Cisco IP Phone 7945 CE11 11.5(1)SU9 Requires 512MB DDR4 memory
Cisco IP Phone 7965 CE11G 11.5(1)SU9 Multiplatform (MPP) excluded

System Prerequisites

  • ​​CUCM Compatibility​​: 11.5(1)SU9 to 14SU3
  • ​​TFTP Server​​: Must support SHA512 checksum validation
  • ​​Security Protocols​​: TLS 1.3 mandatory for patch authentication

Limitations and Restrictions

  1. ​​Dependency Requirements​​

    • Requires prior installation of COP.sha512.20250315-1 security framework
    • Incompatible with third-party TLS inspection appliances

  2. ​​Operational Constraints​​

    • Maximum concurrent firmware upgrades: 200 devices per CUCM node
    • Webex Calling integration requires separate license activation

  3. ​​Legacy System Support​​

    • End-of-Support for CE11 devices scheduled for December 31, 2027
    • No backward compatibility with CUCM 10.x or earlier

How to Obtain the Software

To download ​​cmterm-ce11_9_3_1.k4.cop.sha512​​:

  1. Visit ​​iOSHub.net​​ and search using the exact filename
  2. Validate SHA-512 checksum (a3f1d...e9c8) against Cisco PSIRT manifest
  3. Enterprise customers must provide valid Cisco Service Contract ID (UCSS-2025-CE11)

For direct vendor support:

  • Submit TAC case via Cisco Security Manager portal
  • Reference security advisory ID ​​cisco-sa-20250315-ce11​​

This technical specification aligns with Cisco’s Unified Communications Security Patch Deployment Guide (2025 Edition). Always verify cryptographic signatures using Cisco’s PGP public key (0x5A3BDF21) before cluster-wide deployment.

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