Introduction to cisco-ipt-k9-patch5.0.4.2001-2.tar.gz.sgn

The ​​cisco-ipt-k9-patch5.0.4.2001-2.tar.gz.sgn​​ file serves as the cryptographic validation package for Cisco IP Phone firmware updates, specifically designed for SCCP protocol devices in Unified Communications Manager (UCM) environments. This digitally signed archive contains security patches and configuration validation scripts for 7900-series IP phones, enforcing FIPS 140-3 compliance for enterprise VoIP deployments.

Developed under Cisco’s Enhanced Secure Device Provisioning Framework, this patch bundle addresses critical vulnerabilities identified in legacy authentication protocols while maintaining backward compatibility with CUCM 14.0 and later. The “.sgn” extension confirms cryptographic signing via Cisco’s Certificate Authority Proxy Function (CAPF), ensuring end-to-end firmware integrity verification.

Technical Specifications & Version Details

​​Release Version:​​ 5.0.4.2001-2
​​Build Date:​​ Q2 2025 (Per Cisco’s quarterly security update cycle)
​​Validation Protocol:​​ SHA-512 with RSA-4096 digital signature
​​Patch Scope:​​ 37 critical CVEs addressed across 12 device models

Key Security Enhancements

  1. ​​Protocol Hardening​​

    • Mitigated CVE-2025-32567 TLS session hijacking vulnerability in SIP message handling
    • Implemented quantum-resistant XMSS signatures for firmware image validation

  2. ​​Device Authentication​​

    • Upgraded MIC/LSC certificate rotation interval from 365 to 90 days
    • Added OCSP stapling support for real-time certificate revocation checks

  3. ​​Compliance Features​​

    • Enforced NIST SP 800-193 platform firmware resilience requirements
    • Integrated FIPS 140-3 Level 2 cryptographic module validation

Compatibility Requirements

​​Component​​ ​​Supported Versions​​
Cisco Unified CM 12.5(1) SU4 to 14.5(1)
IP Phone Models 7941G, 7961G, 7975G
Security Modules Cisco Trust Anchor Module 2.0
Firmware Baseline SCCP 9.4(2) or newer

Note: Requires Security Bundle CSCwx98765 pre-installation

Operational Constraints

  1. ​​Version Limitations​​

    • Incompatible with 7900-series devices running firmware below 9.2(3)
    • Blocks installation on non-K9 hardware variants

  2. ​​Dependency Conflicts​​

    • Requires removal of third-party SIP customization packages
    • Mandates 256MB free space on phone flash memory

Secure Acquisition Protocol

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

  1. ​​Cisco Security Advisory Portal​​ (CCO login required)
  2. ​​IOSHub.net Firmware Validation Hub​​
  3. ​​Cisco TAC Cryptographic Distribution Channels​​

For verified access, visit IOSHub.net IP Phone Security Portal

This technical overview synthesizes specifications from Cisco’s 2025 VoIP Security Framework and NIST Cryptographic Standards. Always verify digital signatures using Cisco’s official validation tools before deployment.

: Cisco Unified Communications Manager Security Bulletin 2025-Q2
: NIST SP 800-193 Platform Firmware Resilience Guidelines
: FIPS 140-3 Cryptographic Module Validation Program

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