CVE-2025-54481
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 8744 of biosig.c on the current master branch (35a819fa), when the Tag is 3: else if (tag==3) { // character code char v[17]; // [1] if (len>16) fprintf(stderr,"Warning MFER tag2 incorrect length %i>16\n",len); curPos += ifread(&v,1,len,hdr); v[len] = 0; In this case, the overflowed buffer is the newly-declared `v` \[1\] instead of `buf`. Since `v` is only 17 bytes large, much smaller values of `len` (even those encoded using a single octet) can trigger an overflow in this code path.
CVSS Scores
EPSS Scores
Probability:
Percentile:
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-2025-54481
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
libbiosig_project libbiosig to 3.9.1 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
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 3.9.0 and its master branch. It occurs when processing a specially crafted MFER file with a Tag value of 3. The code allocates a small buffer of 17 bytes but does not properly check the length of the input data, allowing an attacker to overflow this buffer by providing a length greater than 16. This overflow can lead to arbitrary code execution by an attacker who supplies a malicious MFER file.


How can this vulnerability impact me? :

This vulnerability can allow an attacker to execute arbitrary code on the affected system by providing a malicious MFER file. This could lead to full compromise of the system, including unauthorized access, data theft, or disruption of service.


Ask Our AI Assistant
Need more information? Ask your question to get an AI reply (Powered by our expertise)
0/70
EPSS Chart