{"id":68206,"date":"2025-08-30T18:05:36","date_gmt":"2025-08-30T18:05:36","guid":{"rendered":""},"modified":"2025-09-16T11:36:40","modified_gmt":"2025-09-16T17:36:40","slug":"cve-2025-54487-stack-based-buffer-overflow-vulnerability-in-the-biosig-project-libbiosig-3-9-0","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-54487-stack-based-buffer-overflow-vulnerability-in-the-biosig-project-libbiosig-3-9-0\/","title":{"rendered":"CVE-2025-54487: Stack-Based Buffer Overflow Vulnerability in The Biosig Project libbiosig 3.9.0<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

In the realm of cybersecurity, a newly discovered stack-based buffer overflow vulnerability, CVE-2025-54487, threatens the security of systems utilizing The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). This vulnerability is particularly dangerous due to its potential to allow arbitrary code execution, thus providing an attacker with an avenue to compromise a system or leak sensitive data. Given its severity and potential impact, it is vital for organizations and individuals alike to understand the nature of this vulnerability and take proactive steps to mitigate its risks<\/a>.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-54487
\nSeverity: Critical (9.8)
\nAttack Vector: Remote
\nPrivileges Required: None
\nUser Interaction: No
\nImpact: Potential system<\/a> compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

The Biosig Project libbiosig<\/a> | 3.9.0, Master Branch (35a819fa)<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability originates from the MFER parsing functionality in the Biosig Project<\/a> libbiosig 3.9.0 and Master Branch. When parsing a specially crafted MFER file, an attacker could trigger arbitrary code execution<\/a>. This is caused by a stack-based buffer overflow vulnerability<\/a> present on line 8842 of biosig.c on the current master branch (35a819fa), when the Tag is 12.
\nValues of `len` greater than 130 or smaller than 2 can trigger this overflow. The latter case can cause an integer underflow when calculating `len-2` in the given code path, leading to buffer overflow<\/a> and a potential for malicious code execution.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

The following pseudocode illustrates a potential exploit<\/a>:<\/p>\n

#include \n\/\/ Assume the following MFER file structure\nstruct MFER {\nint tag;\nint len;\nchar buf[128];\n};\n\/\/ An attacker could craft an MFER file as follows:\nstruct MFER malicious_file;\nmalicious_file.tag = 12;\nmalicious_file.len = 131; \/\/ or malicious_file.len = 1;\n\/\/ The buffer is filled with malicious payload\nfor (int i = 0; i < malicious_file.len; i++) {\nmalicious_file.buf[i] = 'A'; \/\/ This could be replaced with malicious code\n}<\/code><\/pre>\n
In this conceptual example, an attacker crafts an MFER file with a `tag` of 12 and a `len` value of 131 or 1. This `len` value triggers the buffer overflow in the Biosig Project libbiosig 3.9.0, allowing the attacker's malicious code<\/a> to be executed.<\/p>\n
Mitigation and Recommendations<\/strong><\/p>\n
The best mitigation for this vulnerability is to apply the patch provided by the vendor. If the patch cannot be applied immediately, using Web Application Firewalls (WAFs) or Intrusion Detection Systems (IDS) can offer temporary mitigation. It is also advisable to restrict the processing of untrusted MFER files until the patch is applied.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview In the realm of cybersecurity, a newly discovered stack-based buffer overflow vulnerability, CVE-2025-54487, threatens the security of systems utilizing The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). This vulnerability is particularly dangerous due to its potential to allow arbitrary code execution, thus providing an attacker with an avenue to compromise a system or […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-68206","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t