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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 8779 of biosig.c on the current master branch (35a819fa), when the Tag is 6: else if (tag==6) // 0x06 "number of sequences" { // NRec if (len>4) fprintf(stderr,"Warning MFER tag6 incorrect length %i>4\n",len); curPos += ifread(buf,1,len,hdr);

PUBLISHED Reserved 2025-07-23 | Published 2025-08-25 | Updated 2025-08-25 | Assigner talos




CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-121: Stack-based Buffer Overflow

Product status

3.9.0
affected

Master Branch (35a819fa)
affected

Credits

Discovered by Mark Bereza and Lilith >_> of Cisco Talos.

References

talosintelligence.com/vulnerability_reports/TALOS-2025-2234

cve.org (CVE-2025-54484)

nvd.nist.gov (CVE-2025-54484)

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