EUVD-2023-30059

Comprehensive Technical Analysis of EUVD-2023-30059

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in EUVD-2023-30059 pertains to JD-GUI version 1.6.6, which allows deserialization via the UIMainWindowPreferencesProvider.singleInstance method. Deserialization vulnerabilities are particularly dangerous because they can lead to remote code execution (RCE) if an attacker can manipulate the serialized data.

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) - The vulnerability has a high impact on confidentiality.
• I:H (Integrity: High) - The vulnerability has a high impact on integrity.
• A:H (Availability: High) - The vulnerability has a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attacks: An attacker can exploit this vulnerability over the network, making it a significant threat for remote exploitation.
• Malicious Serialized Data: An attacker could craft malicious serialized data and send it to the vulnerable application, leading to deserialization and potential RCE.

Exploitation Methods:

• Deserialization of Untrusted Data: The attacker can send specially crafted serialized data to the UIMainWindowPreferencesProvider.singleInstance method, which, upon deserialization, could execute arbitrary code.
• Payload Injection: The attacker could inject a payload that, when deserialized, performs malicious actions such as data exfiltration, system compromise, or further propagation of malware.

3. Affected Systems and Software Versions

Affected Software:

• JD-GUI version 1.6.6

Affected Systems:

• Any system running JD-GUI version 1.6.6, including but not limited to:
  • Development environments
  • Continuous Integration/Continuous Deployment (CI/CD) pipelines
  • Systems used for reverse engineering and analysis of Java applications

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Upgrade to a Patched Version: Upgrade JD-GUI to a version that addresses this vulnerability.
• Disable Deserialization: If upgrading is not immediately possible, consider disabling deserialization features or implementing strict input validation to prevent the processing of untrusted serialized data.

Long-Term Mitigation:

• Implement Security Best Practices: Ensure that all software components are regularly updated and patched.
• Network Segmentation: Segment networks to limit the exposure of vulnerable systems.
• Monitoring and Logging: Implement robust 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 and individuals within the European Union, particularly those involved in software development, reverse engineering, and cybersecurity analysis. The high CVSS score indicates that successful exploitation could lead to severe consequences, including data breaches, system compromises, and potential violations of data protection regulations such as GDPR.

6. Technical Details for Security Professionals

Vulnerability Details:

• Deserialization Issue: The vulnerability arises from the unsafe deserialization of data via the UIMainWindowPreferencesProvider.singleInstance method.
• Exploitation: An attacker can exploit this by sending crafted serialized data that, when deserialized, executes arbitrary code.

References:

• GitHub Issue: Issue #415
• GitHub Pull Request: Pull Request #417

Aliases:

• CVE-2023-26234
• GSD-2023-26234

Assigner:

• Mitre

EPSS:

• N/A

ENISA ID:

• Product: [{"id":"183f5449-8fb8-3f42-a48c-62549ce586b0","product":{"name":"n/a"},"product_version":"n/a"}]
• Vendor: [{"id":"20bbaf22-8931-3bf1-800f-dcd9ee90779b","vendor":{"name":"n/a"}}]

Conclusion: This vulnerability highlights the importance of secure coding practices, particularly in handling serialized data. Organizations should prioritize patching and implementing robust security measures to mitigate the risk associated with deserialization vulnerabilities.