CVE-2025-27392
Okay, here’s a remediation/mitigation strategy for the vulnerability described, formatted in Markdown:
CVE-2025-27392: SCALANCE LPE9403 VXLAN Configuration Command Injection
Vulnerability Description:
A command injection vulnerability exists in Siemens SCALANCE LPE9403 devices. Specifically, the device fails to properly sanitize user input when creating new VXLAN configurations. An authenticated, highly-privileged remote attacker can exploit this vulnerability to execute arbitrary code on the device.
Affected Product:
- SCALANCE LPE9403 (6GK5998-3GS00-2AC2)
- All versions prior to V4.0
Severity:
- CVSS v3.1 Score: 8.6 (High)
- CVSS v3.1 Vector: AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H (According to the provided information, likely Network, Low Attack Complexity, High Privileges Required, No User Interaction, Changed Scope, High Confidentiality Impact, High Integrity Impact, High Availability Impact)
Known Exploit:
- While the description states the vulnerability is present and can be exploited, specific exploit details are not provided in this report. The information indicates an attacker needs high privileges and can execute arbitrary code. Therefore, exploitation would likely involve crafting malicious input during the VXLAN configuration process that is then interpreted as commands by the underlying operating system.
Remediation/Mitigation Strategy:
This strategy prioritizes immediate actions and longer-term preventative measures.
1. Immediate Actions (Short-Term Mitigation):
- Apply the Firmware Update: The most critical step is to upgrade SCALANCE LPE9403 devices to version V4.0 or later. This update should contain a fix for the reported input sanitization issue. Refer to Siemens’ official security advisory for the updated firmware and detailed upgrade instructions.
- Restrict Access (Principle of Least Privilege):
- Immediately review and restrict access to SCALANCE LPE9403 devices.
- Enforce the principle of least privilege, ensuring that only authorized personnel with a legitimate need can access the device’s configuration interface. Change default passwords immediately if they haven’t been already.
- Disable or remove any unnecessary user accounts with high privileges.
- Network Segmentation: If feasible, isolate SCALANCE LPE9403 devices on a separate network segment. This limits the potential impact of a successful exploit by preventing lateral movement within the broader network. Consider using firewalls or VLANs to achieve this segmentation.
- Monitor Device Logs: Increase monitoring of SCALANCE LPE9403 device logs for any suspicious activity, especially related to VXLAN configuration or unexpected system commands. Look for unauthorized access attempts, configuration changes, or unusual network traffic patterns. Configure alerts for critical events.
2. Long-Term Prevention and Security Hardening:
- Implement Secure Configuration Management:
- Establish a secure configuration management process for all network devices, including SCALANCE LPE9403. This process should include regular audits of device configurations to ensure compliance with security best practices.
- Implement change management controls to track and approve any modifications to device configurations.
- Harden the SCALANCE LPE9403 Device:
- Consult the Siemens’ documentation for recommended security hardening guidelines for the SCALANCE LPE9403.
- Disable any unnecessary services or features on the device.
- Ensure that strong passwords are used for all accounts.
- Vulnerability Scanning: Regularly scan your network (including SCALANCE LPE9403 devices, if possible without disrupting operations) with a vulnerability scanner to identify and address other potential security weaknesses.
- Intrusion Detection/Prevention System (IDS/IPS): Deploy an IDS/IPS solution on your network to detect and prevent malicious activity targeting SCALANCE LPE9403 devices. Configure the IDS/IPS with rules specific to known SCALANCE vulnerabilities and general command injection attacks.
- Security Awareness Training: Provide regular security awareness training to IT staff and other users who access network devices. This training should cover topics such as password security, phishing attacks, and the importance of reporting suspicious activity.
- Vendor Security Updates: Establish a process for staying informed about security advisories from Siemens and other vendors. Promptly apply security updates to all network devices and software. Subscribe to the Siemens ProductCERT notification service.
- Review and Test Backups: Regularly test the backups of your SCALANCE LPE9403 device configurations to ensure they are valid and can be used to restore the device to a known good state in the event of a compromise.
- Penetration Testing: Perform regular penetration testing to proactively identify and exploit vulnerabilities in your network infrastructure, including SCALANCE LPE9403 devices.
Important Considerations:
- Consult Siemens’ Official Documentation: Always refer to the official documentation from Siemens for the most accurate and up-to-date information on security advisories, firmware updates, and security hardening guidelines for SCALANCE LPE9403 devices.
- Test in a Non-Production Environment: Before applying any firmware updates or configuration changes to production devices, thoroughly test them in a non-production environment to ensure they do not introduce any unexpected issues.
- Business Impact Assessment: Consider the potential business impact of a successful exploit of this vulnerability and prioritize remediation efforts accordingly. Devices that are critical to business operations should be addressed first.
- Coordination: Communicate and coordinate these remediation steps with your internal security team, network administrators, and other relevant stakeholders.
By following this remediation/mitigation strategy, you can significantly reduce the risk of a successful attack targeting the SCALANCE LPE9403 command injection vulnerability.
Assigner
- Siemens AG [email protected]
Date
- Published Date: 2025-03-11 09:48:22
- Updated Date: 2025-03-11 10:15:18