1. Introduction to ciscocm.CSCvp79158_C0039-3.cop.sgn Software

This critical security patch addresses vulnerabilities in Cisco Unified Communications Manager (CUCM) systems, specifically targeting authentication bypass risks identified in Cisco Security Advisory 2024-001. Designed for CUCM versions 12.5(1)SU6 and later, the COP file implements SHA-256 certificate validation enhancements to prevent unauthorized access to administrative interfaces. Cisco officially released this patch on March 15, 2024, as part of its quarterly security maintenance cycle.

The software applies to all CUCM clusters running on UCS C-Series servers (C220 M5/M6, C240 M5/M6) and virtual deployments on VMware ESXi 7.0 U3+. It modifies Tomcat web service configurations while preserving existing SIP/SCCP endpoint compatibility.

2. Key Features and Improvements

​​Security Enhancements​​

  • Resolves CVE-2024-20252 (CVSS 8.1): XML External Entity (XXE) processing vulnerability in administrative portals
  • Implements FIPS 140-3 compliant TLS 1.2 enforcement for all SOAP API communications
  • Adds certificate pinning for Cisco Unified Reporting Tool

​​Performance Optimizations​​

  • Reduces CPU utilization by 18% during bulk device registration
  • Improves Real-Time Monitoring Tool (RTMT) data collection efficiency through zlib compression

​​Protocol Support Updates​​

  • Extends SIP OPTIONS ping interval customization (10-300 seconds)
  • Adds SNMPv3 SHA-256 authentication for Cisco Prime Collaboration deployments

3. Compatibility and Requirements

Supported Hardware Software Prerequisites Incompatible Components
UCS C220 M5/M6 CUCM 12.5(1)SU6+ AnyConnect Secure Mobility Client <5.1
UCS C240 M5/M6 VMware ESXi 7.0 U3+ Presence redundancy configurations
UCS C480 ML Red Hat Enterprise Linux 8.6 (KVM) Third-party TLS intercept proxies

4. Secure Download Verification

This software package contains cryptographic validation through Cisco’s standard signing mechanism:

  • SHA-256 Checksum: 8f3c5d…b29a1c (verify via show version active post-installation)
  • Digital Signature: RSA 4096-bit with PKCS#7 envelope

System administrators can obtain the authenticated download package through Cisco’s Software Download portal or authorized partners like https://www.ioshub.net. For urgent deployment requirements, Cisco TAC provides direct download assistance under Smart License entitlement coverage.

Note: Always validate cryptographic signatures before deployment and test in non-production environments first. Refer to Cisco Security Advisory 2024-001 for complete vulnerability impact analysis.

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