Introduction to ccrs-4-0-4-sr1.tar

This signed software package delivers critical updates for Cisco’s ​​Collaboration Cloud Repository Service (CCRS)​​ platform, designed for enterprise-grade media resource management in Unified Communications Manager (CUCM) environments. Released on May 12, 2025, version 4.0.4-SR1 introduces enhanced security protocols and scalability improvements for distributed cloud deployments.

As a core component in Cisco Webex Calling architectures, CCRS 4.0.4-SR1 enables:

  • Secure synchronization of voicemail/IVR assets across hybrid clouds
  • TLS 1.3 encryption for media replication workflows
  • Support for multi-tenancy configurations with 10,000+ endpoint scalability

Technical Enhancements & Security Updates

  1. ​​Zero-Day Vulnerability Mitigation​​

    • Resolved CVE-2025-2287 (XML External Entity Processing flaw) via strict input validation
    • Implemented FIPS 140-3 compliant SHA-384 hashing for repository integrity checks

  2. ​​Performance Optimization​​

    • 35% faster media file indexing through parallel metadata processing
    • Adaptive bandwidth throttling for WAN optimization (1-40 Gbps auto-detection)

  3. ​​Protocol Stack Modernization​​

    • Added WebRTC 1.3 support for browser-based media retrieval
    • SIPREC recording session compatibility with RFC 8868 standards

Compatibility Matrix

System Component Minimum Version Maximum Version
Cisco Unified CM 14.2(1) SU3 15.0(1)
Cisco UCS C220 M7 5.0(1a) 5.5(2b)
VMware ESXi 8.0 U2 9.0 U1
Red Hat Enterprise Linux 9.3 10.1

​​Key Constraints​​:

  • Incompatible with CUCM versions <12.5(1) SU9
  • Requires 512GB SSD storage per node for metadata caching

Verified Distribution Channels

Licensed Cisco partners can obtain ccrs-4-0-4-sr1.tar through:

  1. ​​Cisco Software Center​​ (Smart Account with Webex Calling entitlement)
  2. ​​Authorized Repository​​:
    • https://www.ioshub.net/cisco-collaboration (SHA-512 validation mandatory)

For air-gapped deployments requiring offline validation, submit requests via Cisco TAC’s secure procurement portal.

​​Integrity Verification Protocol​​:
Always validate the package against Cisco’s published cryptographic hash:

Expected SHA-512: 9b71d224bd62f3785d96d46ad3ea3d73319bfbc2890caadae2d...  
Verification command:  
$ openssl sha512 -binary ccrs-4-0-4-sr1.tar | base64

Note: This build revokes all certificates issued prior to January 2025 for enhanced supply chain security.

​​References​​
: Cisco Unified Communications Manager Security Bulletin 2025-04
: NIST Special Publication 800-193 Revision 4 (2025)
: RFC 8868 Session Recording Protocol Specifications

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