EUVD-2024-21241

Comprehensive Technical Analysis of EUVD-2024-21241

1. Vulnerability Assessment and Severity Evaluation

The EUVD entry EUVD-2024-21241 describes a server-side request forgery (SSRF) vulnerability in the Energy Management Controller with Cloud Services, specifically affecting models JH-RVB1 and JH-RV11 with firmware versions B0.1.9.1 and earlier. This vulnerability allows an unauthenticated attacker to send arbitrary HTTP GET requests from the affected product.

Severity Evaluation:

• CVSS Base Score: 9.1
• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

The high base score of 9.1 indicates a critical vulnerability. The CVSS vector breakdown shows that the attack can be executed over the network (AV:N), requires low complexity (AC:L), does not need any privileges (PR:N) or user interaction (UI:N), and has a high impact on confidentiality and integrity (C:H/I:H) while not affecting availability (A:N).

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Adjacent Attack: An attacker on the same network as the vulnerable device can exploit this vulnerability.
• Remote Attack: If the device is exposed to the internet, an attacker can exploit this vulnerability remotely.

Exploitation Methods:

• Arbitrary HTTP Requests: The attacker can craft HTTP GET requests to internal or external services, potentially leading to data exfiltration, unauthorized access, or service disruption.
• Internal Network Scanning: The attacker can use the vulnerable device to scan internal networks, discovering other devices and services.
• Bypassing Firewalls: The attacker can send requests to internal services that are otherwise protected by firewalls, effectively bypassing network security controls.

3. Affected Systems and Software Versions

Affected Products:

• Energy Management Controller with Cloud Services JH-RVB1
• Energy Management Controller with Cloud Services JH-RV11

Affected Versions:

• Firmware versions B0.1.9.1 and earlier

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Network Segmentation: Isolate the affected devices from the broader network to limit potential attack vectors.
• Firewall Rules: Implement strict firewall rules to restrict inbound and outbound traffic to and from the affected devices.
• Monitoring: Increase monitoring of network traffic to detect any unusual activity that may indicate an exploitation attempt.

Long-Term Mitigation:

• Firmware Update: Apply the latest firmware updates provided by SHARP CORPORATION as soon as they are available.
• Access Controls: Implement robust access controls to ensure only authorized users can interact with the devices.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar vulnerabilities in the future.

5. Impact on European Cybersecurity Landscape

The vulnerability in the Energy Management Controller with Cloud Services poses a significant risk to European organizations, particularly those in the energy sector. The potential for unauthorized access and data exfiltration could lead to severe disruptions in energy management systems, impacting critical infrastructure and public services. The high CVSS score underscores the urgency for immediate action to mitigate this risk.

6. Technical Details for Security Professionals

Vulnerability Details:

• Type: Server-Side Request Forgery (SSRF)
• Impact: Allows unauthenticated attackers to send arbitrary HTTP GET requests from the affected device.
• Exploitation: Can be exploited over the network with low complexity.

Detection and Response:

• Log Analysis: Review logs for unusual HTTP requests originating from the affected devices.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious network activity.
• Incident Response Plan: Develop and implement an incident response plan specific to SSRF vulnerabilities, including steps for containment, eradication, and recovery.

References:

• Japanese Vulnerability Note
• Japanese Vulnerability Note (Japanese)
• JVN Vulnerability Database

Aliases:

• CVE-2024-23788
• GSD-2024-23788

Assigner:

• JPCERT

EPSS Score:

• 1 (indicating a low likelihood of exploitation in the wild, but this should not diminish the urgency of mitigation efforts)

By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of exploitation and maintain the integrity and security of their energy management systems.