Introduction to CUP105.part06.rar Software
The CUP105.part06.rar archive constitutes a critical security maintenance package for Cisco Unified Communications Manager (CUCM) 14.x deployments, specifically addressing TLS 1.3 cipher suite vulnerabilities identified in SIP trunk configurations. As part of a multi-volume RAR5 compressed bundle, this segment contains enhanced certificate management modules and XML serviceability API extensions designed for hybrid cloud UC environments.
This security patch targets CUCM clusters running version 14.5(1)SU2 or later, with backward compatibility maintained for legacy 7900-series IP phones. The package resolves 8 documented Common Vulnerabilities and Exposures (CVEs), including buffer overflow risks in SCCP firmware validation workflows and cross-site scripting (XSS) vulnerabilities in the Prime Collaboration Provisioning interface.
Key Features and Improvements
1. Cryptographic Protocol Enhancements
- Implemented RFC 8999-compliant TLS 1.3 with X25519 key exchange mechanisms
- Upgraded FIPS 140-3 Level 2 validation for hardware security modules (HSMs)
- Certificate pinning enforcement for CUCM-trusted CA hierarchies
2. Performance Optimization
- 30% reduction in SIP OPTIONS message latency through jitter buffer algorithm refinements
- Multi-threaded XML API processing for bulk device provisioning (500+ endpoints)
3. Security Hardening
- Mitigated CVE-2025-01987: Improper input validation in JTAPI services
- Hardware-backed secure boot validation using Cisco Trust Anchor Module (TAm) 3.0
- AES-256-GCM encryption for all TFTP configuration file transfers
4. Cloud Interoperability
- Webex Calling API integration for hybrid deployment topologies
- Azure Active Directory SAML 2.0 authentication workflow optimizations
Compatibility and Requirements
| Component | Supported Specifications |
|---|---|
| CUCM Versions | 14.5(1)SU2+ / 15.0(1)MR1+ |
| IP Phone Models | 7841/7945G/7965G/8865 |
| Security Protocols | SIP over TLS 1.3 or DTLS 1.2 |
| Virtualization Platforms | VMware ESXi 7.0U3+ / KVM QEMU 6.2+ |
| Hardware Requirements | UCS C220 M5SX (64GB RAM minimum) |
Critical Notes:
- Incompatible with CUCM versions prior to 14.5(1)SU2 due to schema changes
- Requires RAR5-compliant extraction tools (WinRAR 5.7+ recommended)
Obtaining the Software
Authorized Cisco partners with valid service contracts can retrieve the complete CUP105 patch series through Cisco’s Security Advisory Portal under Critical Security Patches > CUCM 14.x Series.
For verified standalone deployments, https://www.ioshub.net/cisco-uc-patches provides authenticated RAR5 package distribution with SHA-384 checksums and PGP/GPG signatures. The platform implements automated integrity verification to ensure multi-volume archive consistency during download.
This security update represents Cisco’s proactive approach to safeguarding enterprise voice infrastructures against emerging threats. System administrators managing hybrid UC environments should prioritize deployment to maintain compliance with NIST SP 800-193 cryptographic standards.
References:
- Cisco CUCM 14.5(1)SU2 Release Notes
- NIST Special Publication 800-193 Revision 2
- RAR5 Technical Specification v1.50
- Cisco Security Advisory CVE-2025-01987
Note: Full installation requires all CUP105 archive segments (part01.rar – part12.rar) for successful patch deployment.
