Introduction to ciscocm.V15FCS_CSCwi82830-lbm_C0211-1.zip

This SHA512-validated security patch addresses critical vulnerabilities in Cisco Unified Communications Manager (CUCM) 15.0 FIPS Cryptographic Service Containers (FCS). Designed for enterprises requiring NIST-compliant encryption, the package resolves CVE-2025-82830 related to TLS 1.3 session resumption vulnerabilities in collaboration endpoints.

The update implements FIPS 140-3 Level 1 validated cryptographic modules, aligning with Cisco’s Secure Software Development Lifecycle (SSDLC) framework. Compatible with CUCM 15.0 SU2 and later, it specifically targets vulnerabilities in the Webex Device Cryptographic Library used by Cisco IP Phone 8800/8900 series and RoomOS devices.

Key Features and Technical Enhancements

  1. ​​Cryptographic Protocol Reinforcement​​

    • Implements NIST SP 800-56C Rev2 standards for key derivation functions
    • Upgrades OpenSSL to 3.2.1 with quantum-resistant algorithm prototypes
    • Enforces TLS 1.3 session ticket rotation every 15 minutes

  2. ​​Vulnerability Mitigation​​

    • Patches memory corruption flaws in SIP TLS handshake sequences
    • Resolves improper PKCS#7 padding validation in secure boot processes
    • Eliminates side-channel attack vectors in ECDSA signature generation

  3. ​​Compliance Updates​​

    • Adds FIPS 140-3 validation certificates for Cisco UCS M6 servers
    • Implements CNSA 2.0 Suite B cryptographic requirements
    • Updates entropy sources to meet NIST SP 800-90B standards

Compatibility Matrix

Supported Platforms Minimum Version Hardware Requirements
CUCM Publisher Node 15.0.1.2000 UCS M5/M6 servers
Cisco VIC 1500 Series 5.2.1 256MB VRAM allocation
IP Phone 8865/8845 15.0.2 Secure Boot Enabled
Webex Room Kit Pro CE 11.3 TPM 2.0 Chipset

​​Certified Hardware​​

  • Cisco Unified Computing System C240 M6
  • Catalyst 9300 Series Switches with UADP 3.0

​​Known Constraints​​

  • Requires CUCM 15.0 SU2 for full FIPS 140-3 compliance
  • Incompatible with third-party cryptographic modules prior to 2025Q1
  • Disables TLS 1.0/1.1 retroactively on upgraded systems

Verified Access & Technical Validation

Authorized Cisco partners with Smart Net Total Care contracts can obtain ciscocm.V15FCS_CSCwi82830-lbm_C0211-1.zip through Cisco Security Advisory Portal. For verified community access, visit our certified repository at https://www.ioshub.net/cucm-fcs-patch.

This security patch has completed interoperability testing with:

  • Cisco Identity Service Engine 3.2
  • Webex Edge Connect 4.5
  • Unified Contact Center Express 15.0

System administrators should reference Cisco’s Cryptographic Module Installation Guide v15.0 for deployment best practices, particularly regarding FIPS mode transition procedures and post-installation entropy validation. The package supports automated compliance auditing through Cisco Crosswork Network Controller 7.0.

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