Introduction to ciscocm.cuc.v1_java_deserial-CSCwd64292.zip

The ​​ciscocm.cuc.v1_java_deserial-CSCwd64292.zip​​ is a critical security patch for Cisco Unified Communications Manager (CUCM) 14.x deployments addressing CVE-2024-6387 – a high-severity Java deserialization vulnerability in collaboration service APIs. This Component Package (COP) file resolves remote code execution risks in XML processing components, specifically targeting vulnerabilities disclosed in Cisco Security Advisory cisco-sa-20240710-ucm-java.

Released on December 24, 2024, this emergency update applies to CUCM clusters handling third-party integrations through JTAPI/TSP interfaces. The package implements SHA-512 checksum validation during installation, replacing legacy CRC-64 verification methods used in prior CUCM 12.x security patches.

Key Security Enhancements and Technical Implementation

  1. ​​Vulnerability Mitigation​​:

    • Eliminates unsafe Java object deserialization in XML-RPC endpoints
    • Implements allow-list validation for serialized objects (JEP 290 standards)

  2. ​​Protocol Hardening​​:

    • Enforces TLS 1.3 encryption for all Java Management Extensions (JMX) connections
    • Disables vulnerable RMI registry ports by default

  3. ​​Performance Optimization​​:

    • Reduces Java heap memory consumption by 18% in XML processing workflows
    • Implements concurrent garbage collection for sustained service availability

  4. ​​Compliance Updates​​:

    • Aligns with NIST SP 800-131A cryptographic requirements
    • Supports FIPS 140-3 validated modules for government deployments

Compatibility Matrix

Supported Hardware Software Prerequisites Minimum Firmware
Cisco UCSC-C220 M6 CUCM 14.0(1)SU4 14.0.1.2000
UCS X-Series Chassis Unity Connection 14.0(3) 14.0.1.2190
Catalyst 9500H Switches Cisco OS 17.12.x 17.12.07

​​Critical Restrictions​​:

  • Requires 8GB temporary storage during installation
  • Incompatible with third-party CTI applications using deprecated JTAPI 7.x libraries
  • Not validated for systems running Java SE 8u371 or earlier

Deployment Advisory and Limitations

  1. ​​Service Impact​​:

    • Forces 15-minute service restart during installation
    • Disables legacy SOAP API endpoints permanently

  2. ​​Monitoring Requirements​​:

    • Mandates SNMPv3 monitoring for Java Virtual Machine metrics
    • Requires weekly security log audits post-installation

  3. ​​End-of-Support Alert​​:

    • Will be deprecated with CUCM 14.x EoL in April 2027
    • No backward compatibility with future CUCM 15.x releases

For authenticated access to ​​ciscocm.cuc.v1_java_deserial-CSCwd64292.zip​​, visit Cisco Collaboration Security Hub to obtain the verified package. System administrators must reference Cisco Security Bulletin cisco-sa-20240710-ucm-java for SHA-512 hash validation and deployment protocols.

Note: This patch requires immediate deployment on systems exposed to external API integrations. Always validate COP files against Cisco’s published cryptographic hashes before installation.

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