{"id":68128,"date":"2025-08-30T15:04:39","date_gmt":"2025-08-30T15:04:39","guid":{"rendered":""},"modified":"2025-09-16T11:36:42","modified_gmt":"2025-09-16T17:36:42","slug":"cve-2025-54484-stack-based-buffer-overflow-vulnerability-in-biosig-project-s-libbiosig-3-9-0","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-54484-stack-based-buffer-overflow-vulnerability-in-biosig-project-s-libbiosig-3-9-0\/","title":{"rendered":"<strong>CVE-2025-54484: Stack-Based Buffer Overflow Vulnerability in Biosig Project&#8217;s libbiosig 3.9.0<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Biosig Project&#8217;s libbiosig 3.9.0 and Master Branch (35a819fa) are plagued by a critical vulnerability, specifically a stack-based buffer overflow that can be exploited via a specially crafted MFER file. This vulnerability has far-reaching implications, affecting any system utilizing this widely-used library for biosignal processing. It&#8217;s crucial for system administrators and developers to understand the gravity of this vulnerability, as successful exploitation could lead to arbitrary code execution, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-40741-stack-based-overflow-vulnerability-in-solid-edge-se2025-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"75735\">potential system<\/a> compromise or data leakage.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-54484<br \/>\nSeverity: Critical (CVSS: 9.8)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: Arbitrary code execution, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30404-integer-overflow-vulnerability-in-executorch-resulting-in-potential-system-compromise\/\"  data-wpil-monitor-id=\"75946\">potential system<\/a> compromise, and data leakage.<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-4239231308\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 720px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 22px; font-weight: 600; display: flex; align-items: center; letter-spacing: -0.02em;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 10px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 42px; height: 42px;\" \/>\r\n    <\/a>\r\n    Share secrets securely\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 14px; color: #d1d5db;\">\r\n    Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 18px; color: #a1a1aa;\">\r\n    Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 24px; color: #e4e4e7;\">\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Encrypted identity<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Private Spaces for organizations and teams<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 End-to-end encrypted chat, calls, files, and notes<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Sensitive AI work and protected collaboration<\/li>\r\n    <li>\u2022 Built for information that cannot leak<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px; color: #ffffff;\">\r\n    Our mission is to secure human work alongside AI.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Download Ameeba\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Learn More\r\n    <\/a>\r\n  <\/div>\r\n<\/div><\/div>\n<p>Product | Affected Versions<\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54480-critical-stack-based-buffer-overflow-vulnerability-in-the-biosig-project-libbiosig-3-9-0\/\"  data-wpil-monitor-id=\"83209\">Biosig Project libbiosig<\/a> | 3.9.0 and Master Branch (35a819fa)<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The stack-based <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32412-unchecked-buffer-vulnerability-in-fuji-electric-smart-editor\/\"  data-wpil-monitor-id=\"75714\">buffer overflow vulnerability<\/a> exists in the MFER parsing functionality of the Biosig Project&#8217;s libbiosig library. The vulnerability manifests when the Tag is 6, as described in line 8779 of biosig.c on the current master branch (35a819fa). An attacker can exploit this vulnerability by providing a specially crafted MFER file that triggers this overflow, leading to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27577-arbitrary-code-execution-in-openharmony-via-race-condition-vulnerability\/\"  data-wpil-monitor-id=\"76238\">arbitrary code execution<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-330279075\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>This is a conceptual representation of how the vulnerability might be exploited.<\/p>\n<pre><code class=\"\" data-line=\"\">#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\nint main() {\nFILE *file;\nchar buf[4];\nint len = 5;\n\/\/ Open file in write mode.\nfile = fopen(&quot;malicious.MFER&quot;, &quot;w&quot;);\n\/\/ Write to file.\nfwrite(buf, 1, len, file);\n\/\/ Close file.\nfclose(file);\nreturn 0;\n}<\/code><\/pre>\n<p>In this example, a file named &#8220;malicious.MFER&#8221; is created with a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-44952-buffer-overflow-vulnerability-in-pfcp-library-of-open5gs-due-to-missing-length-check\/\"  data-wpil-monitor-id=\"78370\">buffer size of 4 but a length<\/a> of 5. When this file is processed by the vulnerable function, it will trigger a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41388-stack-based-buffer-overflow-vulnerability-in-fuji-electric-smart-editor\/\"  data-wpil-monitor-id=\"75719\">buffer overflow<\/a> due to the mismatch between buffer size and length.<\/p>\n<p><strong>Recommendation<\/strong><\/p>\n<p>It is highly recommended to apply the vendor patch as soon as it becomes available. Until then, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary measure to mitigate the risk of exploitation. It is also crucial to monitor system logs for any suspicious activities that may indicate an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46414-unlimited-pin-attempts-vulnerability-in-api\/\"  data-wpil-monitor-id=\"81228\">attempt to exploit this vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Biosig Project&#8217;s libbiosig 3.9.0 and Master Branch (35a819fa) are plagued by a critical vulnerability, specifically a stack-based buffer overflow that can be exploited via a specially crafted MFER file. This vulnerability has far-reaching implications, affecting any system utilizing this widely-used library for biosignal processing. It&#8217;s crucial for system administrators and developers to understand [&hellip;]<\/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,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-68128","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/68128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=68128"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/68128\/revisions"}],"predecessor-version":[{"id":75751,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/68128\/revisions\/75751"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=68128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=68128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=68128"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=68128"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=68128"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=68128"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=68128"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=68128"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=68128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}