{"id":68043,"date":"2025-08-30T12:03:22","date_gmt":"2025-08-30T12:03:22","guid":{"rendered":""},"modified":"2025-09-16T11:36:42","modified_gmt":"2025-09-16T17:36:42","slug":"cve-2025-54481-critical-buffer-overflow-vulnerability-in-the-biosig-project-libbiosig-3-9-0-and-master-branch","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-54481-critical-buffer-overflow-vulnerability-in-the-biosig-project-libbiosig-3-9-0-and-master-branch\/","title":{"rendered":"CVE-2025-54481: Critical Buffer Overflow Vulnerability in The Biosig Project libbiosig 3.9.0 and Master Branch<\/strong>"},"content":{"rendered":"

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

An alarming security vulnerability, CVE-2025-54481, has been identified in The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa), posing a significant threat to system integrity and data privacy. This stack-based buffer overflow vulnerability resides in the MFER parsing functionality, leading to potential system compromise or data leakage if successfully exploited. Given the widespread usage of The Biosig Project libbiosig in various applications, this vulnerability poses serious risks to numerous systems<\/a> and their users worldwide.<\/p>\n

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

CVE ID: CVE-2025-54481
\nSeverity: Critical, CVSS 9.8
\nAttack Vector: Local\/Network
\nPrivileges Required: None
\nUser Interaction: Required
\nImpact: System Compromise<\/a>, Data Leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

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

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

The vulnerability exploits the MFER parsing functionality in The Biosig Project<\/a> libbiosig. An attacker can initiate an overflow by providing a specially crafted MFER file. The overflow occurs due to the buffer<\/a> ‘v’, which is smaller in size (17 bytes). The critical vulnerability<\/a> triggers when the Tag value is 3 in the code. The overflowed buffer<\/a> is ‘v’ and not ‘buf. Even much smaller values of ‘len’, those encoded using a single octet, can trigger an overflow in this code<\/a> path.<\/p>\n

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

Given below is a conceptual example of how the vulnerability might be exploited. Here, a malicious MFER file is submitted to the system<\/a>:<\/p>\n

# Malicious MFER file creation\n$ echo \"malicious_payload\" > exploit.mfer\n# Sending malicious MFER file to the target system\n$ curl -X POST -H \"Content-Type: application\/octet-stream\" --data-binary @exploit.mfer http:\/\/target.example.com\/vulnerable_endpoint<\/code><\/pre>\n
In this example, a malicious payload is created and stored in an MFER file. The file is then sent to a vulnerable endpoint on the target system<\/a>.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
To mitigate this vulnerability, users are strongly advised to apply the vendor provided patch as soon as possible. If a patch cannot be applied immediately, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation, alerting administrators to potential exploitation<\/a> attempts.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview An alarming security vulnerability, CVE-2025-54481, has been identified in The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa), posing a significant threat to system integrity and data privacy. This stack-based buffer overflow vulnerability resides in the MFER parsing functionality, leading to potential system compromise or data leakage if successfully exploited. Given the widespread usage […]<\/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],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-68043","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow"],"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