The Biosig Project Libbiosig Stack-Based Buffer Overflow Vulnerability in MFER Parsing

A stack-based buffer overflow vulnerability has been identified in The Biosig Project's libbiosig version 3.9.0 and the Master Branch (35a819fa). This vulnerability arises in the MFER (Medical waveform Format Encoding Rules) parsing functionality, where a specially crafted MFER file can be used to execute arbitrary code. The issue occurs when the 'number of sequences' tag (Tag 6) is processed, allowing an attacker to provide a malicious file that triggers the vulnerability.

Impact

Exploitation of this vulnerability leads to a stack-based buffer overflow, allowing for arbitrary code execution.

Reproduction

The vulnerability can be reproduced by using a crafted MFER file that exploits the buffer overflow condition. The file should be designed to include a 'number of sequences' tag with a length that exceeds the buffer capacity, causing the overflow when the file is parsed by libbiosig.

Remediation

Users are advised to update to the patched version of libbiosig, which is available on the project's official website.