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CVE-2025-52461: Information Leak Vulnerability in The Biosig Project libbiosig 3.9.0

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Overview

The Biosig Project libbiosig 3.9.0, a popular library for processing biomedical signal data, has been discovered to contain a serious out-of-bounds read vulnerability. Labeled as CVE-2025-52461, this flaw can potentially lead to system compromise and data leakage, posing a significant risk to any organization using the affected versions of the software. This vulnerability is particularly concerning due to the critical nature of the data typically processed by Biosig, which often includes sensitive healthcare information.

Vulnerability Summary

CVE ID: CVE-2025-52461
Severity: High (CVSS: 8.2)
Attack Vector: Local
Privileges Required: Low
User Interaction: Required
Impact: Potential system compromise and data leakage

Affected Products

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Product | Affected Versions

The Biosig Project libbiosig | 3.9.0 and Master Branch (35a819fa)

How the Exploit Works

The vulnerability lies within the Nex parsing functionality of the Biosig software. An attacker who can convince a user to open a specially crafted .nex file can cause an out-of-bounds read error. This error can lead to the leakage of sensitive information which might include user credentials, private keys, or other confidential data. If an attacker gains access to such information, they could potentially compromise the system or network where the software is operating.

Conceptual Example Code

In this hypothetical scenario, an attacker might craft a malicious .nex file that takes advantage of the vulnerability. When this file is opened using the affected version of libbiosig, it could trigger the out-of-bounds read, leaking sensitive information.

# Attacker crafts a malicious .nex file
$ echo "malicious content" > exploit.nex
# User is tricked into opening the file with libbiosig
$ libbiosig parse exploit.nex

Please note that this is a conceptual representation and may not accurately reflect the technical specifics of the exploit.

Mitigation

Users are advised to apply the vendor’s patch as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation. These measures can help detect and block attempts to exploit this vulnerability, providing a layer of defense while a more permanent solution is implemented.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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