CVE-2025-31964: HCL BigFix IVR DOS Vulnerability

CVE-2025-31964 Overview

CVE-2025-31964 is an Insecure Default Configuration vulnerability affecting HCL BigFix IVR version 4.2. The vulnerability stems from improper service binding configuration in internal service components, where administrative services are bound to external network interfaces instead of the local authentication interface. This misconfiguration allows a privileged attacker with network access to potentially impact service availability.

Critical Impact

A privileged attacker can exploit this improper service binding to affect the availability of administrative services by accessing them through external network interfaces that should be restricted to local authentication only.

Affected Products

• HCL BigFix IVR version 4.2

Discovery Timeline

• 2026-01-07 - CVE CVE-2025-31964 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-31964

Vulnerability Analysis

This vulnerability is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor), though the primary impact in this case relates to service availability rather than direct information disclosure. The root issue lies in the configuration of internal service components within HCL BigFix IVR, where administrative services are incorrectly bound to external network interfaces.

The vulnerability requires network access and high privileges to exploit, along with specific conditions that increase attack complexity. While the scope is contained to the vulnerable component itself, successful exploitation could allow an attacker to disrupt the availability of administrative services.

Root Cause

The vulnerability originates from improper service binding configuration where administrative services within HCL BigFix IVR version 4.2 are bound to external network interfaces. These services should be restricted to the local authentication interface to prevent unauthorized access from the network. This misconfiguration exposes administrative functionality that was intended to be accessible only locally.

Attack Vector

The attack vector is network-based, requiring the attacker to have existing high-level privileges and the ability to reach the affected service over the network. The attacker must identify and connect to administrative services that have been incorrectly exposed on external network interfaces. Due to the high attack complexity and privilege requirements, exploitation is not trivial.

The vulnerability affects service availability (Availability impact: Low), while confidentiality and integrity remain unaffected according to the CVSS assessment. For detailed technical guidance, refer to the HCL Software Knowledge Base Article.

Detection Methods for CVE-2025-31964

Indicators of Compromise

• Unexpected network connections to administrative service ports from external IP addresses
• Unusual authentication attempts against administrative interfaces from non-local sources
• Service disruption or availability issues affecting HCL BigFix IVR administrative components

Detection Strategies

• Monitor network traffic for connections to administrative services originating from external network interfaces
• Implement network segmentation monitoring to detect access attempts crossing security boundaries
• Review HCL BigFix IVR service logs for connection attempts from unexpected source addresses

Monitoring Recommendations

• Configure alerting for administrative service access from non-localhost addresses
• Implement network-level monitoring for connections to affected service ports
• Establish baseline behavior for administrative service access patterns and alert on deviations

How to Mitigate CVE-2025-31964

Immediate Actions Required

• Review the service binding configuration for HCL BigFix IVR version 4.2 administrative services
• Verify that administrative services are bound to local authentication interfaces only
• Implement network-level access controls to restrict access to administrative service ports
• Consult the HCL Software Knowledge Base Article for vendor-specific remediation guidance

Patch Information

Organizations running HCL BigFix IVR version 4.2 should consult the official HCL Software advisory for patch availability and upgrade instructions. Review the HCL Software Knowledge Base Article for the latest remediation information and any available security updates.

Workarounds

• Configure firewall rules to block external access to administrative service ports
• Implement network segmentation to isolate HCL BigFix IVR administrative interfaces
• Restrict administrative service access to trusted management networks only
• Consider binding services to 127.0.0.1 or localhost interfaces until a patch is applied

# Example: Firewall rule to restrict administrative service access
# Adjust port numbers based on your HCL BigFix IVR configuration
iptables -A INPUT -p tcp --dport <admin_port> -s 127.0.0.1 -j ACCEPT
iptables -A INPUT -p tcp --dport <admin_port> -j DROP