EUVD-2023-2722

Comprehensive Technical Analysis of EUVD-2023-2722

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2023-2722 affects the Change Request application, which allows users to request changes on a wiki without directly publishing them. The vulnerability exists in versions starting from 0.11 up to 1.9.1. It allows unprivileged users to perform script injection and remote code execution by inserting a specially crafted title when creating a new Change Request.

Severity Evaluation:

• CVSS Base Score: 10.0 (Critical)
• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

The high base score indicates that the vulnerability is critical due to its low attack complexity, lack of required privileges, and the severe impact on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Script Injection: An attacker can inject malicious scripts into the application by crafting a specific title when creating a Change Request.
• Remote Code Execution (RCE): The injected script can be executed on the server, leading to arbitrary code execution.

Exploitation Methods:

• An attacker can exploit this vulnerability by creating a new Change Request with a title that includes malicious code.
• The malicious code can then be executed on the server, allowing the attacker to perform various actions such as data exfiltration, system compromise, or further propagation of malware.

3. Affected Systems and Software Versions

Affected Software:

• Application: Change Request
• Versions: 0.11 to 1.9.1

Affected Systems:

• Any system running the vulnerable versions of the Change Request application, particularly those with user-generated content and wiki functionalities.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Upgrade: Upgrade to Change Request version 1.9.2 or later, which includes the fix for this vulnerability.
• Workaround: If upgrading is not immediately possible, edit the document ChangeRequest.Code.ChangeRequestSheet and apply the same changes as in the fix commit (7565e720117f73102f5a276239eabfe85e15cff4).

Additional Mitigations:

• Input Validation: Implement strict input validation and sanitization for all user-generated content.
• Access Controls: Enforce strict access controls and permissions to limit the actions unprivileged users can perform.
• Monitoring: Implement monitoring and logging to detect and respond to any suspicious activities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using the Change Request application, particularly those in the European Union. The potential for remote code execution can lead to data breaches, system compromises, and further cyber-attacks. Given the critical nature of the vulnerability, it is essential for organizations to prioritize patching and mitigation efforts to protect their systems and data.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2023-45138
• GHSA ID: GHSA-f776-w9v2-7vfj
• Assigner: GitHub_M
• EPSS Score: 38 (indicating a moderate likelihood of exploitation)

References:

• GitHub Security Advisory
• NVD Detail
• Fix Commit
• GitHub Repository
• Jira Issue

ENISA IDs:

• Product ID: 7799a39b-2d6d-3b31-bd7c-3c214206128f
• Vendor ID: 0d8bc133-1c3e-35ee-ab08-d76ab4064bd6

Conclusion: This vulnerability underscores the importance of regular security audits, timely patching, and robust input validation mechanisms. Organizations should prioritize upgrading to the patched version or applying the workaround to mitigate the risk of exploitation. Continuous monitoring and incident response planning are also crucial to detect and respond to any potential attacks effectively.