CVE-2025-54487
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-08-25

Last updated on: 2025-11-03

Assigner: Talos

Description
A stack-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.This vulnerability manifests on line 8842 of biosig.c on the current master branch (35a819fa), when the Tag is 12: else if (tag==12) //0x0C { // sampling resolution if (len>6) fprintf(stderr,"Warning MFER tag12 incorrect length %i>6\n",len); val32 = 0; int8_t v8; curPos += ifread(&UnitCode,1,1,hdr); curPos += ifread(&v8,1,1,hdr); curPos += ifread(buf,1,len-2,hdr); In addition to values of `len` greater than 130 triggering a buffer overflow, a value of `len` smaller than 2 will also trigger a buffer overflow due to an integer underflow when computing `len-2` in this code path.
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Meta Information
Published
2025-08-25
Last Modified
2025-11-03
Generated
2026-05-07
AI Q&A
2025-08-25
EPSS Evaluated
2026-05-05
NVD
CVE-2025-54487
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
libbiosig_project libbiosig to 3.9.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a stack-based buffer overflow in the MFER parsing functionality of The Biosig Project libbiosig version 3.9.0 and its master branch. It occurs when processing a specially crafted MFER file with a Tag value of 12. If the length value (len) is greater than 130 or smaller than 2, it causes a buffer overflow due to improper handling of the length parameter, including an integer underflow when computing len-2. This can allow an attacker to execute arbitrary code by providing a malicious MFER file.


How can this vulnerability impact me? :

This vulnerability can allow an attacker to execute arbitrary code on the affected system without any privileges or user interaction, potentially leading to full system compromise. Because it is a stack-based buffer overflow, it can be exploited remotely by supplying a malicious MFER file, resulting in high impact on confidentiality, integrity, and availability of the system.


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