{"id":68461,"date":"2025-08-30T21:06:43","date_gmt":"2025-08-30T21:06:43","guid":{"rendered":""},"modified":"2025-11-01T13:07:32","modified_gmt":"2025-11-01T19:07:32","slug":"cve-2025-54490-buffer-overflow-vulnerability-in-the-biosig-project-libbiosig","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-54490-buffer-overflow-vulnerability-in-the-biosig-project-libbiosig\/","title":{"rendered":"<strong>CVE-2025-54490: Buffer Overflow Vulnerability in The Biosig Project libbiosig<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa) is a library widely used for handling biomedical signal data. It has been discovered that a severe stack-based buffer overflow vulnerability (CVE-2025-54490) exists in the MFER parsing functionality of this library. This vulnerability, if exploited, could lead to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27577-arbitrary-code-execution-in-openharmony-via-race-condition-vulnerability\/\"  data-wpil-monitor-id=\"76241\">arbitrary code execution<\/a>, posing a grave threat to the security and integrity of systems running the vulnerable versions of the library. With a CVSS Severity Score of 9.8, it is essential for cybersecurity professionals, system administrators, and developers to understand the nature of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42950-sap-landscape-transformation-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"77574\">vulnerability and how to mitigate its potential<\/a> impact.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-54490<br \/>\nSeverity: Critical (CVSS: 9.8)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8939-buffer-overflow-vulnerability-in-tenda-ac20-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"78265\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2097949334\" 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: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\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: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\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: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>The <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=\"83217\">Biosig Project libbiosig<\/a> | 3.9.0 and Master Branch (35a819fa)<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55444-severe-sql-injection-vulnerability-in-online-artwork-and-fine-arts-mca-project-1-0\/\"  data-wpil-monitor-id=\"76712\">vulnerability resides in the MFER parsing functionality of the Biosig<\/a> Project libbiosig 3.9.0 and Master Branch (35a819fa). It triggers on line 9090 of biosig.c, when the Tag is 64. In this scenario, an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54351-buffer-overflow-vulnerability-in-iperf\/\"  data-wpil-monitor-id=\"77198\">overflowed buffer<\/a> `tmp` is declared instead of `buf`. Although `tmp` is larger than `buf`, measuring 256 bytes, a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23311-stack-overflow-vulnerability-in-nvidia-triton-inference-server-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"78800\">stack overflow<\/a> can occur if `len` is encoded using multiple octets and is greater than 256. This stack-based <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9007-critical-buffer-overflow-vulnerability-in-tenda-ch22-1-0-0-1\/\"  data-wpil-monitor-id=\"76534\">buffer overflow vulnerability<\/a> can be exploited by an attacker providing a specially crafted MFER file, leading to arbitrary code execution.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1983670983\" 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>While we can&#8217;t provide a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5014-arbitrary-file-deletion-vulnerability-in-home-villas-real-estate-wordpress-theme\/\"  data-wpil-monitor-id=\"92077\">real MFER file<\/a>, the exploit would conceptually involve creating a malicious MFER file with a `len` value greater than 256. Below is a simplistic representation:<\/p>\n<pre><code class=\"\" data-line=\"\"># Pseudocode for creating a malicious MFER file\ndef create_malicious_file():\nlen_value = generate_len_value()  # This would generate a len value &gt; 256\ntag_value = 64  # The tag value that triggers the vulnerability\nmfer_file = MFERFile()\nmfer_file.set_tag(tag_value)\nmfer_file.set_len(len_value)\nmfer_file.save(&quot;malicious.mfer&quot;)<\/code><\/pre>\n<p>This pseudocode illustrates the concept of how an attacker might create a malicious MFER <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54689-high-risk-php-remote-file-inclusion-vulnerability-in-urna\/\"  data-wpil-monitor-id=\"76607\">file to exploit the vulnerability<\/a>. The actual exploit would involve more complex <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55746-unauthenticated-file-manipulation-vulnerability-in-directus\/\"  data-wpil-monitor-id=\"78736\">manipulations and a deep understanding of the MFER file<\/a> format and the Biosig library.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>Users of the affected versions of The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53557-critical-heap-based-buffer-overflow-vulnerability-in-the-biosig-project-libbiosig\/\"  data-wpil-monitor-id=\"83228\">Biosig Project<\/a> libbiosig are strongly recommended to apply patches provided by the vendor as soon as they are available. In the meantime, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation, helping to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20217-denial-of-service-vulnerability-in-snort-3-detection-engine-of-cisco-secure-firewall-threat-defense-software\/\"  data-wpil-monitor-id=\"76958\">detect and prevent attempts to exploit the vulnerability<\/a>. However, these measures are not foolproof and cannot replace the need for a patched and updated system.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa) is a library widely used for handling biomedical signal data. It has been discovered that a severe stack-based buffer overflow vulnerability (CVE-2025-54490) exists in the MFER parsing functionality of this library. This vulnerability, if exploited, could lead to arbitrary code execution, posing a grave threat [&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-68461","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\/68461","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=68461"}],"version-history":[{"count":13,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/68461\/revisions"}],"predecessor-version":[{"id":85284,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/68461\/revisions\/85284"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=68461"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=68461"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=68461"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=68461"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=68461"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=68461"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=68461"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=68461"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=68461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}