Hewlett Packard Enterprise (HPE) has recently released patches to address multiple vulnerabilities in its StoreOnce software, notably a critical authentication bypass flaw identified as CVE-2025-37093, which carries a CVSS score of 9.8. This vulnerability stems from improper implementation of the machineAccountCheck method, allowing potential attackers to circumvent authentication mechanisms and gain unauthorized access to affected systems.
Understanding the Vulnerability
The critical flaw resides in the machineAccountCheck method within the StoreOnce software. Due to inadequate implementation of the authentication algorithm, attackers can exploit this weakness to bypass authentication protocols. This vulnerability is particularly concerning because it could serve as an entry point for unauthorized users to access sensitive data and system functionalities without proper credentials.
Potential Risks and Exploitation
While there have been no reported instances of this vulnerability being exploited in the wild, the nature of backup solutions like StoreOnce makes them attractive targets for cybercriminals. Backup systems often contain comprehensive copies of an organization’s data, making unauthorized access to these systems a significant threat. Security firm Arctic Wolf has highlighted that, although no active exploitation has been observed, the potential for future attacks exists, given the historical targeting of backup solutions by threat actors.
Additional Vulnerabilities Addressed
In addition to CVE-2025-37093, HPE’s recent update addresses seven other security issues within the StoreOnce software. Among these, four are classified as high-severity vulnerabilities that could lead to remote code execution (RCE). Although exploiting these RCE vulnerabilities requires authentication, when combined with the critical authentication bypass flaw, they could enable attackers to fully compromise vulnerable systems. The remaining vulnerabilities, while less severe, still pose risks and have been mitigated in the latest software release.
HPE’s Response and Recommendations
HPE has responded promptly by releasing StoreOnce version 4.3.11, which includes fixes for the identified vulnerabilities. The company strongly recommends that all users of StoreOnce products, including the virtual appliance StoreOnce VSA, update their systems to this latest version to mitigate potential security risks.
Steps for Users to Secure Their Systems
To ensure the security of their backup systems, users should take the following steps:
1. Update to the Latest Version: Download and install StoreOnce version 4.3.11 from HPE’s official support page. This update addresses the critical authentication bypass vulnerability and other identified security issues.
2. Review System Configurations: Assess current system configurations to ensure that security settings align with best practices and that no unauthorized changes have been made.
3. Monitor System Logs: Regularly review system logs for any unusual activity that could indicate attempted or successful exploitation of vulnerabilities.
4. Implement Network Segmentation: Ensure that backup systems are appropriately segmented from other network resources to limit potential attack vectors.
5. Educate Staff: Provide training for IT staff on recognizing and responding to potential security threats, emphasizing the importance of timely software updates and vigilant monitoring.
The Importance of Timely Updates
This incident underscores the critical importance of promptly applying security updates to protect against emerging threats. Organizations must remain vigilant and proactive in maintaining the security of their systems, especially those that store and manage sensitive data. Regularly updating software, monitoring for unusual activity, and adhering to security best practices are essential components of a robust cybersecurity strategy.
Conclusion
HPE’s swift action in addressing the critical authentication bypass vulnerability in StoreOnce demonstrates the company’s commitment to security. By releasing StoreOnce version 4.3.11, HPE has provided users with the necessary tools to protect their backup systems from potential exploitation. Users are urged to apply this update immediately and to remain proactive in their cybersecurity efforts to safeguard their data and systems against future threats.
