EUVD-2023-40187

Comprehensive Technical Analysis of EUVD-2023-40187

1. Vulnerability Assessment and Severity Evaluation

The EUVD entry EUVD-2023-40187 describes a Server-Side Template Injection (SSTI) vulnerability in MotoCMS Version 3.4.3, specifically within the Store Category Template via the keyword parameter. The vulnerability has a CVSS Base Score of 9.8, indicating a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): None (N) - No special privileges are required to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability allows for significant breaches of confidentiality.
• Integrity (I): High (H) - The vulnerability allows for significant breaches of integrity.
• Availability (A): High (H) - The vulnerability allows for significant breaches of availability.

Given the high scores in confidentiality, integrity, and availability, this vulnerability poses a severe risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

The SSTI vulnerability can be exploited by injecting malicious code into the keyword parameter of the Store Category Template. Potential attack vectors include:

• Remote Code Execution (RCE): An attacker could inject code that executes arbitrary commands on the server, leading to full system compromise.
• Data Exfiltration: An attacker could inject code to extract sensitive information from the server, such as database credentials or user data.
• Denial of Service (DoS): An attacker could inject code that causes the server to crash or become unresponsive, leading to service disruption.

Exploitation methods may involve crafting specially designed HTTP requests that include malicious payloads in the keyword parameter.

3. Affected Systems and Software Versions

The vulnerability specifically affects MotoCMS Version 3.4.3. It is crucial to identify all instances of this software version within an organization's infrastructure to assess the scope of the risk.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Patch Management: Immediately apply the latest security patches provided by MotoCMS. Upgrade to a version that addresses this vulnerability.
• Input Validation: Implement robust input validation and sanitization for all user-supplied data, especially for parameters like the keyword.
• Web Application Firewalls (WAF): Deploy WAFs to detect and block malicious input patterns associated with SSTI attacks.
• Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and address similar vulnerabilities.
• Monitoring and Logging: Enhance monitoring and logging to detect unusual activities that may indicate an exploitation attempt.

5. Impact on European Cybersecurity Landscape

The presence of this vulnerability underscores the importance of vigilant cybersecurity practices within the European Union. Organizations using MotoCMS, particularly those in e-commerce, are at risk of significant data breaches and service disruptions. The high severity score indicates that successful exploitation could have far-reaching consequences, including financial loss, reputational damage, and potential legal repercussions under GDPR.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Exploit Details: The vulnerability can be triggered by injecting template code into the keyword parameter. Example payloads might include expressions that evaluate to system commands or database queries.
• Detection: Look for unusual patterns in HTTP requests, especially those targeting the keyword parameter. Anomalies in server logs, such as unexpected command execution or database queries, may indicate an exploitation attempt.
• Response: In the event of a suspected exploitation, isolate the affected system, conduct a thorough forensic analysis, and implement immediate mitigation measures. Notify relevant stakeholders and regulatory bodies as required.

Conclusion

The SSTI vulnerability in MotoCMS Version 3.4.3 poses a critical risk to affected systems. Organizations must prioritize patching and implementing robust security measures to mitigate this risk. Continuous monitoring and proactive security practices are essential to safeguard against such vulnerabilities and maintain a secure cybersecurity landscape within the European Union.

References

• Exploit Database Entry
• Vulners Entry

Aliases

• CVE-2023-36210
• GSD-2023-36210