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 64
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-202763
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2025-202763 pertains to several stack-based buffer overflow issues 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, which is considered critical. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates the following:
- 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 affects the same security scope.
- Confidentiality (C:H): High impact on confidentiality.
- Integrity (I:H): High impact on integrity.
- Availability (A:H): High impact on availability.
Given these factors, the vulnerability poses a significant risk to systems using libbiosig 3.9.1.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector involves providing a specially crafted MFER file to the system. This file can be delivered through various means, including:
- Email Attachments: Sending the malicious file as an email attachment.
- Web Downloads: Hosting the file on a website and enticing users to download it.
- Network Shares: Placing the file on a shared network drive.
Once the malicious MFER file is processed by the vulnerable MFER parsing functionality, it can trigger a stack-based buffer overflow, leading to arbitrary code execution. This allows attackers to execute malicious code with the same privileges as the application processing the file.
3. Affected Systems and Software Versions
The vulnerability specifically affects:
- Software: The Biosig Project's libbiosig
- Version: 3.9.1
Any system or application that utilizes libbiosig 3.9.1 for MFER file parsing is at risk. This includes but is not limited to:
- Biomedical Research Software: Applications that process biomedical signals.
- Healthcare Systems: Devices and software that rely on libbiosig for signal processing.
- Scientific Research Tools: Any tool that uses libbiosig for data analysis.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Update Software: Immediately update to a patched version of libbiosig if available. If no patch is available, consider using an alternative library or implementing additional input validation.
- Input Validation: Implement strict input validation to ensure that MFER files are properly formatted and do not contain malicious data.
- Sandboxing: Run the application in a sandboxed environment to limit the impact of a successful exploit.
- Network Segmentation: Segregate critical systems from less secure networks to reduce the attack surface.
- User Education: Educate users about the risks of opening files from untrusted sources.
5. Impact on European Cybersecurity Landscape
The vulnerability in libbiosig 3.9.1 has significant implications for the European cybersecurity landscape, particularly in sectors that rely heavily on biomedical signal processing, such as healthcare and scientific research. The potential for arbitrary code execution poses a severe risk to data integrity, confidentiality, and system availability. Given the critical nature of these sectors, a successful exploit could lead to data breaches, service disruptions, and potential harm to patients.
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: Processing a specially crafted MFER file with Tag 64.
- Exploitation: The vulnerability can be exploited to achieve arbitrary code execution, potentially leading to full system compromise.
- Detection: Monitor for unusual network activity, unexpected file modifications, and abnormal application behavior. Implement intrusion detection systems (IDS) and intrusion prevention systems (IPS) to detect and block malicious MFER files.
- Response: In case of a suspected exploit, isolate the affected system, perform a thorough forensic analysis, and apply necessary patches and updates.
Conclusion
The vulnerability EUVD-2025-202763 in libbiosig 3.9.1 is critical and requires immediate attention. Organizations using the affected software should prioritize updating to a patched version and implement additional security measures to mitigate the risk. The potential impact on European cybersecurity, particularly in healthcare and research sectors, underscores the urgency of addressing this vulnerability promptly.