EUVD-2024-26192

Comprehensive Technical Analysis of EUVD-2024-26192

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-26192, also known as CVE-2024-29159, pertains to a buffer overflow in the H5Z__filter_scaleoffset function within the HDF5 library versions up to and including 1.14.3. This 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 can be exploited remotely over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources to exploit.
• Privileges Required (PR): None (N) - No special privileges are needed to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required for the exploit to succeed.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability can result in a complete loss of confidentiality.
• Integrity (I): High (H) - The vulnerability can result in a complete loss of integrity.
• Availability (A): High (H) - The vulnerability can result in a complete loss of availability.

Given the high scores in confidentiality, integrity, and availability, this vulnerability poses a significant risk to systems using the affected versions of the HDF5 library.

2. Potential Attack Vectors and Exploitation Methods

The buffer overflow in the H5Z__filter_scaleoffset function can be exploited through several attack vectors:

• Remote Exploitation: An attacker can send specially crafted data to a system using the vulnerable HDF5 library, potentially causing a denial of service (DoS) or executing arbitrary code.
• Malicious Files: An attacker could create malicious HDF5 files that, when processed by a vulnerable system, trigger the buffer overflow.
• Network Services: Any network service that processes HDF5 files using the vulnerable library versions could be targeted for remote exploitation.

3. Affected Systems and Software Versions

The vulnerability affects all systems and applications that use HDF5 library versions up to and including 1.14.3. This includes:

• Scientific and engineering applications that rely on HDF5 for data storage and manipulation.
• High-performance computing (HPC) environments.
• Any software that integrates the HDF5 library for handling hierarchical data formats.

4. Recommended Mitigation Strategies

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

• Update to the Latest Version: Upgrade to HDF5 version 1.14.4 or later, which includes the fix for this vulnerability.
• Input Validation: Implement strict input validation for any data processed by the HDF5 library to prevent malicious data from triggering the buffer overflow.
• Network Segmentation: Segment networks to limit the exposure of vulnerable systems to potential attackers.
• Monitoring and Logging: Enhance monitoring and logging to detect any unusual activity that may indicate an attempted exploitation.
• Patch Management: Ensure that all systems and applications using the HDF5 library are part of a regular patch management program.

5. Impact on European Cybersecurity Landscape

The impact of this vulnerability on the European cybersecurity landscape is significant due to the widespread use of the HDF5 library in scientific, engineering, and HPC environments. Organizations in these sectors should prioritize patching and mitigation efforts to prevent potential data breaches, service disruptions, and unauthorized code execution. The high CVSS score underscores the urgency of addressing this vulnerability to maintain the integrity and security of critical systems.

6. Technical Details for Security Professionals

• Vulnerability Type: Buffer Overflow
• Affected Function: H5Z__filter_scaleoffset
• Impact: Corruption of the instruction pointer, leading to denial of service or potential code execution.
• Exploitability: The vulnerability can be exploited remotely with low complexity and no user interaction required.
• Detection: Security professionals should look for anomalies in HDF5 file processing, such as unexpected crashes or unusual network traffic patterns.
• Response: Immediate patching and implementation of input validation mechanisms are critical. Regular audits and penetration testing should be conducted to ensure the effectiveness of mitigation strategies.

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

References

• HDF Group Announcement
• EUVD Entry: EUVD-2024-26192
• CVE Entry: CVE-2024-29159
• GSD Entry: GSD-2024-29159