EUVD-2024-22173

Comprehensive Technical Analysis of EUVD-2024-22173

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified as EUVD-2024-22173 pertains to a Deserialization of Untrusted Data issue in the G5Theme ERE Recently Viewed – Essential Real Estate Add-On. This vulnerability allows for unauthenticated PHP object injection, which can lead to severe security implications.

Severity Evaluation:

• Base Score: 9.8 (Critical)
• Base Score Version: CVSS 3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The CVSS score of 9.8 indicates a critical vulnerability. The vector string breaks down as follows:

• AV:N (Attack Vector: Network) - The vulnerability is exploitable over the network.
• AC:L (Attack Complexity: Low) - The attack requires low complexity.
• PR:N (Privileges Required: None) - No privileges are required to exploit the vulnerability.
• UI:N (User Interaction: None) - No user interaction is required.
• S:U (Scope: Unchanged) - The vulnerability does not change the security scope.
• C:H (Confidentiality: High) - There is a high impact on confidentiality.
• I:H (Integrity: High) - There is a high impact on integrity.
• A:H (Availability: High) - There is a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated PHP Object Injection: An attacker can inject malicious PHP objects into the application without needing authentication.
• Deserialization of Untrusted Data: The vulnerability allows an attacker to send crafted serialized data, which, when deserialized, can execute arbitrary code.

Exploitation Methods:

• Remote Code Execution (RCE): By injecting malicious PHP objects, an attacker can execute arbitrary code on the server.
• Data Exfiltration: An attacker can extract sensitive information from the server.
• Denial of Service (DoS): An attacker can disrupt the availability of the service by exploiting the vulnerability.

3. Affected Systems and Software Versions

Affected Software:

• Product: ERE Recently Viewed – Essential Real Estate Add-On
• Vendor: G5Theme
• Versions Affected: n/a through 1.3

All versions up to and including 1.3 are affected by this vulnerability.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Upgrade to a patched version of the ERE Recently Viewed – Essential Real Estate Add-On if available.
• Disable the Plugin: If a patch is not available, consider disabling the plugin until a fix is released.
• Input Validation: Implement strict input validation and sanitization to prevent the injection of malicious data.

Long-Term Strategies:

• Regular Updates: Ensure that all plugins and software are regularly updated to the latest versions.
• Security Audits: Conduct regular security audits and vulnerability assessments.
• Monitoring: Implement monitoring and logging to detect and respond to suspicious activities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations using the affected plugin. The potential for remote code execution and data exfiltration can lead to severe breaches, financial losses, and reputational damage. Given the critical nature of the vulnerability, it is essential for organizations to prioritize mitigation efforts to protect their systems and data.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2024-24797
• GSD ID: GSD-2024-24797
• Assigner: Patchstack
• EPSS Score: 1 (indicating a low likelihood of exploitation in the wild, but this should not be relied upon due to the critical nature of the vulnerability)

Exploitation Steps:

1. Identify the Target: Locate a server running the vulnerable version of the ERE Recently Viewed – Essential Real Estate Add-On.
2. Craft Malicious Input: Create a serialized PHP object containing malicious code.
3. Send Payload: Send the crafted payload to the vulnerable endpoint.
4. Execute Code: Upon deserialization, the malicious code is executed on the server.

Detection and Response:

• Intrusion Detection Systems (IDS): Deploy IDS to detect unusual network traffic patterns indicative of exploitation attempts.
• Web Application Firewalls (WAF): Use WAFs to block malicious input and prevent the exploitation of the vulnerability.
• Incident Response Plan: Develop and implement an incident response plan to quickly address any detected exploitation attempts.

Conclusion: The EUVD-2024-22173 vulnerability in the G5Theme ERE Recently Viewed – Essential Real Estate Add-On is critical and requires immediate attention. Organizations should prioritize patching and implementing robust security measures to mitigate the risk. Continuous monitoring and regular security assessments are essential to protect against such vulnerabilities in the future.