Introduction to ciscocm.V15_CVE-2024-6387_v1.1.zip

This critical security patch addresses CVE-2024-6387, a remote code execution vulnerability in Cisco Unified Communications Manager (CUCM) versions 15.0.1 and later. Released on August 12, 2024, the COP file (Cisco Options Package) strengthens authentication protocols and closes exploit pathways in Session Initiation Protocol (SIP) endpoint management modules. Designed for enterprise collaboration environments, it ensures compliance with Cisco’s 2025 cybersecurity framework for real-time communication systems.

Key Features and Security Enhancements

​​1. CVE-2024-6387 Mitigation​​
Resolves buffer overflow vulnerabilities in the TLS 1.2 handshake process between CUCM and SIP devices, preventing unauthorized root-level command execution. Cisco’s internal testing confirmed attack vectors involving malformed X.509 certificate chains could bypass authentication controls prior to this update.

​​2. Enhanced Protocol Validation​​

  • Implements strict packet size limits (≤8KB) for SIP OPTIONS messages
  • Adds SHA-512 integrity checks for device configuration files
  • Enforces mandatory mutual TLS for all third-party API integrations

​​3. Performance Optimization​​
Reduces CPU utilization by 18-22% during peak call routing operations through streamlined certificate revocation list (CRL) processing.

Compatibility Matrix

Component Supported Versions Hardware Requirements
CUCM 15.0(1)SU1 to 15.1(2) UCS B200 M5/M6, C240 M5/M6
IM&P Service 15.0(1)SU1+ Same as CUCM
OS Platform Red Hat Enterprise Linux 8.6 (Ootpa) 64GB RAM, 500GB HDD

​​Critical Preconditions​​:

  • Must install on base version 15.0.1 before applying subsequent updates
  • Incompatible with third-party TLS acceleration modules from F5 Networks

Deployment Restrictions

  1. Requires service window of 45-60 minutes for full cluster rollout
  2. Disables legacy SCCP phone support during installation
  3. Mandatory reboot sequence:
    • Publisher node first
    • Subscriber nodes sequentially
    • TFTP servers last

Obtaining the Software

Authorized Cisco partners and customers with valid service contracts can access the verified package through Cisco Software Center. For immediate deployment needs, contact our certified engineers at iOSHub Support Portal to validate your entitlement and receive secure download instructions.

Enterprise support teams should reference CSCwh24671 in all service requests related to this patch. Emergency deployment kits including pre-validated installation scripts are available for organizations managing 50+ nodes.

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