CVE-2025-2239 in Next Generation FireWall
Summary
by MITRE • 03/12/2025
Generation of Error Message Containing Sensitive Information vulnerability in Hillstone Networks Hillstone Next Generation FireWall.This issue affects Hillstone Next Generation FireWall: from 5.5R8P1 before 5.5R8P23.
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Analysis
by VulDB Data Team • 03/12/2025
The vulnerability identified as CVE-2025-2239 represents a critical security flaw in Hillstone Networks' Next Generation Firewall product line, specifically impacting versions ranging from 5.5R8P1 through 5.5R8P22. This weakness falls under the category of information exposure through error messages, a pattern that has been consistently documented in cybersecurity frameworks including CWE-209 and CWE-215. The vulnerability stems from the firewall's improper handling of error conditions during system operations, where sensitive system information becomes inadvertently exposed within generated error messages. Such information disclosure can include internal system paths, configuration details, user data, or other confidential elements that should remain protected from unauthorized access.
The technical implementation of this vulnerability occurs when the firewall encounters exceptional conditions during processing of network traffic or administrative commands. During these error scenarios, the system fails to sanitize error messages before display or logging, resulting in the inclusion of sensitive data elements. This flaw is particularly concerning as it operates at the application level within the firewall's error handling subsystem, making it accessible through normal network operations and administrative interfaces. The vulnerability demonstrates a clear breakdown in the principle of least privilege and information hiding, where the system's defensive mechanisms fail to properly isolate sensitive operational data from error reporting mechanisms.
From an operational perspective, this vulnerability creates significant risk for organizations relying on Hillstone Next Generation Firewalls for network security. Attackers who can trigger error conditions or observe error messages may gain insights into the firewall's internal structure, configuration parameters, and potentially user data or system credentials. The impact extends beyond simple information disclosure as it can facilitate further exploitation attempts, including reconnaissance for targeted attacks or the identification of additional vulnerabilities within the system. Security professionals should note that this vulnerability aligns with ATT&CK technique T1068, which covers 'Exploitation for Privilege Escalation' and T1566, 'Phishing for Information', as the sensitive data exposure can be leveraged for more sophisticated attack vectors.
Organizations using affected firewall versions must implement immediate mitigation strategies to address this vulnerability. The most effective approach involves upgrading to Hillstone Next Generation Firewall version 5.5R8P23 or later, which contains the necessary patches to properly sanitize error messages and prevent sensitive information exposure. Additionally, administrators should review and implement proper error handling configurations within the firewall's logging and monitoring systems to ensure that error messages do not contain system-specific information. Network segmentation and access controls should be strengthened to limit potential exploitation of this vulnerability, while continuous monitoring of system logs can help identify any attempts to trigger the error conditions that lead to sensitive information disclosure. The vulnerability also underscores the importance of regular security assessments and the need for comprehensive error handling procedures that align with industry best practices for secure coding and system design.