CVE-2025-31962: HCL BigFix IVR Auth Bypass Vulnerability

CVE-2025-31962 Overview

CVE-2025-31962 is an insufficient session expiration vulnerability affecting the Web UI authentication component in HCL BigFix IVR version 4.2. This weakness (CWE-613) allows an authenticated attacker to maintain prolonged unauthorized access to protected API endpoints due to excessively long session expiration periods. While the vulnerability requires high privileges and user interaction to exploit, it represents a significant security risk in environments where session management is critical for maintaining proper access controls.

Critical Impact

Authenticated attackers can exploit excessive session expiration times to maintain unauthorized access to protected API endpoints, potentially allowing persistent access even after credentials should have been revoked.

Affected Products

• HCL BigFix IVR version 4.2
• HCL BigFix IVR Web UI Authentication Component

Discovery Timeline

• 2026-01-07 - CVE-2025-31962 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-31962

Vulnerability Analysis

This vulnerability stems from improper session lifecycle management within the HCL BigFix IVR Web UI authentication component. Session tokens issued during authentication remain valid for an excessive period, far beyond what is considered secure for session management best practices. This allows authenticated users—particularly those with elevated privileges—to maintain access to protected API endpoints long after their sessions should have been terminated.

The attack requires network access and depends on the attacker already possessing high-level privileges within the system. Additionally, some form of user interaction is required to successfully exploit this weakness. Despite these prerequisites, the vulnerability enables unauthorized information disclosure through continued access to confidential data exposed via the affected API endpoints.

Root Cause

The root cause of CVE-2025-31962 is insufficient session expiration handling within the Web UI authentication mechanism. The application fails to enforce appropriate session timeout policies, allowing session tokens to remain valid for extended periods. This violates the principle of least privilege by granting prolonged access beyond what is necessary for legitimate user operations.

CWE-613 (Insufficient Session Expiration) describes scenarios where web applications fail to invalidate sessions after a reasonable period of inactivity or after authentication credentials have been changed. In this case, the HCL BigFix IVR component does not adequately limit session lifetimes, creating a window for unauthorized access.

Attack Vector

The attack vector for this vulnerability is network-based, requiring the attacker to have authenticated access to the HCL BigFix IVR Web UI. The exploitation scenario involves the following:

1. An attacker with high-level privileges authenticates to the HCL BigFix IVR Web UI
2. The system issues a session token with an excessively long expiration period
3. Even after the user's access should be revoked (e.g., role change, termination), the session token remains valid
4. The attacker continues accessing protected API endpoints using the stale session token
5. Confidential information exposed through these endpoints may be disclosed

The vulnerability primarily impacts confidentiality, as attackers can access protected information through endpoints that should no longer be accessible to them.

Detection Methods for CVE-2025-31962

Indicators of Compromise

• Unusual session activity patterns showing sessions active for abnormally long durations
• API access logs indicating requests from sessions that should have expired
• Authentication events followed by prolonged periods of API activity without re-authentication
• Access to protected endpoints from users whose privileges have been modified or revoked

Detection Strategies

• Monitor session duration metrics and alert on sessions exceeding expected timeouts
• Implement logging for all API endpoint access with session metadata
• Review authentication logs for patterns of prolonged session usage
• Audit access control changes and correlate with active session data

Monitoring Recommendations

• Enable detailed logging for the HCL BigFix IVR Web UI authentication component
• Configure SIEM rules to detect sessions active beyond policy-defined thresholds
• Implement real-time alerting for API access from sessions associated with recently modified user accounts
• Conduct periodic reviews of session management configurations

How to Mitigate CVE-2025-31962

Immediate Actions Required

• Review and reduce session expiration timeouts to align with security best practices
• Implement session invalidation upon privilege changes or user account modifications
• Enable re-authentication requirements for sensitive API operations
• Audit current active sessions and terminate any with excessive durations

Patch Information

HCL Software has published guidance for this vulnerability. Organizations running HCL BigFix IVR version 4.2 should consult the HCL Software Knowledge Base Article for official remediation steps and any available patches.

Workarounds

• Configure shorter session timeout values at the application or infrastructure level
• Implement additional authentication checks for privileged API operations
• Deploy network-level controls to limit API access to trusted sources
• Enable session binding to client attributes (IP address, user agent) where supported
• Consider implementing idle timeout in addition to absolute session expiration

Organizations should implement comprehensive session management policies that include both idle timeouts and absolute session expiration limits. Regular security assessments of authentication mechanisms can help identify similar issues before they become exploitable vulnerabilities.