{"id":68604,"date":"2025-08-30T23:07:18","date_gmt":"2025-08-30T23:07:18","guid":{"rendered":""},"modified":"2025-09-16T11:36:43","modified_gmt":"2025-09-16T17:36:43","slug":"cve-2025-54492-critical-buffer-overflow-vulnerability-in-the-biosig-project-libbiosig","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-54492-critical-buffer-overflow-vulnerability-in-the-biosig-project-libbiosig\/","title":{"rendered":"CVE-2025-54492: Critical Buffer Overflow Vulnerability in The Biosig Project libbiosig<\/strong>"},"content":{"rendered":"

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

CVE-2025-54492 is a critical vulnerability that affects The Biosig Project libbiosig version 3.9.0 and the Master Branch (35a819fa). This vulnerability is a buffer overflow that potentially allows an attacker to execute arbitrary code, possibly leading to system compromise or data leakage. This security flaw matters because it could enable a malicious actor to disrupt the operations of affected systems or steal sensitive information<\/a>, which could lead to significant business and reputation damage.<\/p>\n

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

CVE ID: CVE-2025-54492
\nSeverity: Critical (9.8)
\nAttack Vector: Remote
\nPrivileges Required: None
\nUser Interaction: Required
\nImpact: Potential system<\/a> compromise and 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 exists in the MFER parsing functionality of The Biosig<\/a> Project libbiosig. It occurs due to a stack-based buffer overflow<\/a> on line 9141 of biosig.c when the Tag is 67. In this case, the address of the newly-defined integer `skew` is overflowed<\/a> instead of `buf`. This means that a stack overflow<\/a> can occur with much smaller values of `len` in this code path. An attacker can exploit this vulnerability by providing a specially crafted MFER file that would cause the buffer overflow, leading to arbitrary code execution<\/a>.<\/p>\n

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

This conceptual example demonstrates how a malicious MFER file might be used to exploit the vulnerability<\/a>:<\/p>\n

$ nc target.example.com 1234 < malicious.mfer<\/code><\/pre>\n
In this example, netcat (`nc`) is used to send a malicious MFER file to the vulnerable<\/a> system over a network connection. The malicious file contains data crafted in such a way that it triggers the buffer overflow and allows arbitrary code<\/a> execution.<\/p>\n
Mitigation and Remediation<\/strong><\/p>\n
The best way to mitigate this vulnerability is by applying the vendor patch. In scenarios where immediate patching is not feasible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation by detecting and blocking attempts to exploit this vulnerability<\/a>.
\nEnsure to continuously monitor the security advisories from The Biosig Project<\/a> and perform regular security updates. It's also recommended to follow the principle of least privilege and segment networks to limit the potential<\/a> impact of a breach.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview CVE-2025-54492 is a critical vulnerability that affects The Biosig Project libbiosig version 3.9.0 and the Master Branch (35a819fa). This vulnerability is a buffer overflow that potentially allows an attacker to execute arbitrary code, possibly leading to system compromise or data leakage. This security flaw matters because it could enable a malicious actor to disrupt […]<\/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-68604","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