{"id":67954,"date":"2025-08-30T09:02:23","date_gmt":"2025-08-30T09:02:23","guid":{"rendered":""},"modified":"2025-09-28T06:30:08","modified_gmt":"2025-09-28T12:30:08","slug":"cve-2025-53853-buffer-overflow-vulnerability-in-biosig-project-libbiosig","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-53853-buffer-overflow-vulnerability-in-biosig-project-libbiosig\/","title":{"rendered":"CVE-2025-53853: Buffer Overflow Vulnerability in Biosig Project libbiosig<\/strong>"},"content":{"rendered":"

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

The Biosig Project libbiosig, a popular biosignal processing library, has been discovered to contain a severe heap-based buffer overflow vulnerability. This vulnerability, allocated the identifier CVE-2025-53853, affects version 3.9.0 and the Master Branch (35a819fa) of libbiosig. The exploitation of this vulnerability could lead<\/a> to arbitrary code execution, potentially compromising the entire system or leading to data leakage. This vulnerability is of significant importance due to its high severity<\/a> and the widespread use of the Biosig Project’s libbiosig in the healthcare industry.<\/p>\n

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

CVE ID: CVE-2025-53853
\nSeverity: Critical (CVSS 9.8)
\nAttack Vector: File
\nPrivileges Required: None
\nUser Interaction: Required
\nImpact: System compromise and potential<\/a> data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

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

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

The vulnerability resides in the ISHNE parsing functionality<\/a> of libbiosig. An attacker can exploit this vulnerability by crafting a malicious ISHNE ECG annotations file<\/a>. When this file is processed by the vulnerable software, it triggers a buffer overflow<\/a>. This overflow occurs because the software fails to properly validate the size of the input<\/a> data before copying it to a fixed-size buffer. This can lead to overwriting of adjacent memory spaces, allowing the attacker to execute arbitrary code<\/a>.<\/p>\n

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

Given that the vulnerability occurs during the parsing of an ISHNE ECG annotations file, the exploit would likely involve the creation of such a file with specially designed<\/a> data to trigger the overflow. A conceptual example might look like this:<\/p>\n

#include \n#include \nint main(void) {\nchar buffer[512];\nFILE *fp;\nmemset(buffer, 'A', sizeof(buffer)-1); \/\/ Fill the buffer with 'A's\nbuffer[sizeof(buffer)-1] = '\\0'; \/\/ Null terminate the string\nfp = fopen(\"malicious.ishne\", \"w\");\nfwrite(buffer, sizeof(char), sizeof(buffer), fp); \/\/ Write the buffer to the file\nfclose(fp);\nreturn 0;\n}<\/code><\/pre>\n
This conceptual example creates a malicious ISHNE ECG annotations file that contains a string of ‘A’s longer than the buffer size. When the file is processed by the vulnerable software, it would trigger the buffer overflow<\/a>.<\/p>\n
Recommended Mitigation<\/strong><\/p>\n
Users are advised to apply the vendor patch immediately if available. If the patch is not available or if immediate patching is not feasible, users should consider using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure to detect and block attempts to exploit this vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The Biosig Project libbiosig, a popular biosignal processing library, has been discovered to contain a severe heap-based buffer overflow vulnerability. This vulnerability, allocated the identifier CVE-2025-53853, affects version 3.9.0 and the Master Branch (35a819fa) of libbiosig. The exploitation of this vulnerability could lead to arbitrary code execution, potentially compromising the entire system or leading […]<\/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-67954","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