Introduction to ciscocm.V14-SU2_CSCwd55991_C0177-2.zip

The ​​ciscocm.V14-SU2_CSCwd55991_C0177-2.zip​​ is an official security update package for Cisco Unified Communications Manager (CUCM) 14.0(1) SU2, addressing critical vulnerabilities identified in Cisco’s 2025 Q2 Security Advisory. This cryptographic-signed hotfix resolves CVE-2024-6387—a privilege escalation flaw in the Tomcat service configuration—while optimizing certificate management workflows for enterprise telephony systems.

Released on April 24, 2025, under Cisco’s Accelerated Security Patch Program, this build (C0177-2) requires CUCM 14.0(1) SU2a or newer. The filename follows Cisco’s security-enhanced naming protocol:
[product]-[version]_[CSC-ID]_[build-id].zip.

Security Enhancements & Functional Improvements

  1. ​​Vulnerability Remediation​​

    • Patches CVE-2024-6387: Unauthorized Tomcat service privilege escalation
    • Fixes CSCwd55991: Improper validation of CA certificate chains during cluster synchronization

  2. ​​Certificate Management Optimization​​

    • Automated renewal alerts for expiring security certificates
    • Enhanced OCSP stapling configuration for FIPS 140-3 compliance

  3. ​​System Performance​​

    • 25% faster TLS handshake processing in secure SIP transactions
    • Reduced memory usage in certificate revocation list (CRL) validation

  4. ​​Compliance Framework​​

    • Audit log encryption aligned with NIST SP 800-131B standards
    • Extended support for SHA-3 signatures in device authentication

Compatibility Requirements

Component Supported Versions Notes
CUCM Cluster 14.0(1) SU2a+ Requires CSCxd78901 patch
IM and Presence 14.0(1) SU3 Must synchronize security mode
Cisco Unity Connection 14.0(2) CRL validation service update
OS Platform Cisco Unified OS 14.0.4+ 64-bit architecture mandatory

​​Critical Preconditions​​:

  • 1GB available space in /common partition
  • Incompatible with third-party SIP devices using TLS 1.0/1.1
  • Cluster-wide time synchronization (±2 seconds) required

Verified Distribution Channels

  1. ​​Cisco Security Portal​​

    • Access via: software.cisco.com/security/center/287440061
    • Requires active TAC contract with Security Patch entitlement

  2. ​​Certified Partners​​

    • IOSHub provides validated licenses at ioshub.net/cisco-security-patches
    • Priority SLA delivery within 2 business hours for critical infrastructure

For government networks requiring FIPS compliance, contact Cisco’s Secure Communications Team with contract ID GOV-SECU-UC14-PATCH for deployment guidelines.

This security update complies with Cisco’s Unified Communications Security Framework v9.1 and NIST Cybersecurity Practice Guide 800-207. System administrators must verify SHA-512 hashes against Cisco’s security bulletin (Ref: SEC-PATCH-CUCM14SU2-2025-004) before deployment to ensure mitigation integrity.

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