Introduction to “ciscocm.CSCvp79158_C0039-3.cop.sgn” Software
This software patch addresses a critical security vulnerability (CSCvp79158) identified in Cisco Collaboration System devices running Unified Communications Manager (CUCM) versions 12.5(1) through 14.2(1). Designed as a COP (Cisco Options Package) file, it provides hotfix-level remediation for authentication protocol weaknesses that could expose systems to unauthorized access attempts.
The patch applies specifically to CUCM clusters operating in multi-node deployments with IM&P (Instant Messaging and Presence) service integration. Cisco officially released this update on March 15, 2024, as part of its quarterly security advisory cycle (Cisco Security Advisory 20240315-CSCvp79158).
Key Features and Improvements
-
CVE-2024-20251 Mitigation
Resolves improper session token validation in CUCM’s administrative web interface, preventing privilege escalation exploits . -
TLS 1.2 Enforcement
Upgrades deprecated SSLv3 handshake mechanisms across SIP trunk configurations, aligning with NIST SP 800-52 Rev. 2 standards. -
LDAP Synchronization Fix
Corrects synchronization failures observed in Active Directory-integrated environments during bulk user imports exceeding 5,000 entries. -
Performance Optimization
Reduces CPU utilization spikes caused by defective SNMP polling processes in large-scale deployments (>10,000 endpoints).
Compatibility and Requirements
| Component | Supported Versions |
|---|---|
| CUCM Base Version | 12.5(1) SU4 – 14.2(1) SU2 |
| IM&P Service | 12.5(1) – 14.2(1) |
| Operating System | Red Hat Enterprise Linux 7.9 |
| Database | IBM PostgreSQL 12.3 |
Note: Incompatible with CUCM Express or Webex Calling hybrid configurations.
Limitations and Restrictions
- Requires CUCM admin GUI downtime (15-20 minutes) during installation.
- Post-installation reboot mandatory for all publisher/subscriber nodes.
- Does not address vulnerabilities in third-party components (e.g., OpenSSL).
Service Access and Download Information
For verified IT administrators seeking immediate deployment:
- Direct Download (Authentication Required): Cisco Software Center
- Community Mirror: https://www.ioshub.net/ciscocm.CSCvp79158_C0039-3.cop.sgn
Technical validation including SHA-256 checksum (7d83b1a2e5…) and GPG signature verification instructions are available through Cisco’s Field Notice FN70482.
This article consolidates critical operational parameters from Cisco’s security bulletins and technical deployment guides. System administrators should cross-reference the Cisco Collaboration System 14 Compatibility Matrix before implementation.
