Description
Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger these vulnerabilities.When Tag is 3
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-202764
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2025-202764, also known as CVE-2025-66043, is a critical stack-based buffer overflow issue in the MFER parsing functionality of The Biosig Project's libbiosig version 3.9.1. The severity of this vulnerability is rated with a CVSS Base Score of 9.8, indicating a high level of risk. 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:N): Network, meaning the vulnerability can be exploited remotely.
- Attack Complexity (AC:L): Low, indicating that the attack is relatively straightforward to execute.
- Privileges Required (PR:N): None, meaning no special privileges are needed to exploit the vulnerability.
- User Interaction (UI:N): None, indicating that no user interaction is required for the attack to succeed.
- Scope (S:U): Unchanged, meaning the vulnerability does not affect other systems or components.
- Confidentiality (C:H): High, indicating that the vulnerability can lead to a significant breach of confidentiality.
- Integrity (I:H): High, indicating that the vulnerability can lead to a significant breach of integrity.
- Availability (A:H): High, indicating that the vulnerability can lead to a significant breach of availability.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector for this vulnerability is through the processing of a specially crafted MFER file. An attacker can exploit this vulnerability by:
- Crafting a Malicious MFER File: Creating an MFER file designed to trigger the buffer overflow.
- Delivering the File: Distributing the malicious file through various means such as email attachments, file downloads, or compromised websites.
- Triggering the Vulnerability: When the target system processes the malicious MFER file, the buffer overflow occurs, leading to arbitrary code execution.
3. Affected Systems and Software Versions
The vulnerability specifically affects:
- Software: The Biosig Project libbiosig
- Version: 3.9.1
Any system or application that uses libbiosig version 3.9.1 for MFER file parsing is at risk. This includes but is not limited to:
- Biomedical Research Software: Applications that rely on libbiosig for processing biomedical data.
- Healthcare Systems: Systems that use libbiosig for data analysis and visualization.
- Scientific Research Tools: Software tools that integrate libbiosig for signal processing.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Update to a Patched Version: Upgrade to a version of libbiosig that addresses this vulnerability. If a patch is not yet available, consider using alternative libraries or tools.
- Input Validation: Implement robust input validation to ensure that MFER files are properly sanitized before processing.
- Memory Protection: Enable memory protection mechanisms such as stack canaries, DEP (Data Execution Prevention), and ASLR (Address Space Layout Randomization).
- Network Segmentation: Segregate critical systems from the network to limit the attack surface.
- User Awareness: Educate users about the risks of opening files from untrusted sources.
5. Impact on European Cybersecurity Landscape
The impact of this vulnerability on the European cybersecurity landscape is significant due to the widespread use of libbiosig in biomedical and healthcare applications. The potential for arbitrary code execution poses a serious threat to the confidentiality, integrity, and availability of sensitive data. Organizations in the healthcare and research sectors should prioritize addressing this vulnerability to protect against potential data breaches and ensure compliance with data protection regulations such as GDPR.
6. Technical Details for Security Professionals
For security professionals, the following technical details are pertinent:
- Vulnerability Type: Stack-based buffer overflow.
- Affected Functionality: MFER parsing in libbiosig.
- Trigger Condition: When processing an MFER file with a specific Tag value of 3.
- Exploitation: The vulnerability can be exploited to execute arbitrary code, leading to potential system compromise.
- Detection: Monitor for unusual network traffic patterns and unexpected file processing activities. Implement intrusion detection systems (IDS) to identify suspicious behavior.
- Response: In case of an incident, isolate affected systems, perform forensic analysis, and apply necessary patches and updates.
Conclusion
EUVD-2025-202764 represents a critical vulnerability in The Biosig Project's libbiosig that requires immediate attention. Organizations using the affected software should prioritize updating to a patched version and implementing robust security measures to mitigate the risk of exploitation. The potential impact on the European cybersecurity landscape underscores the importance of proactive vulnerability management and incident response strategies.