Biosig libbiosig 3.9.0 MFER Parser biosig.c stack-based overflow

Summaryinfo

A vulnerability was found in Biosig libbiosig 3.9.0. It has been rated as critical. Impacted is an unknown function of the file biosig.c of the component MFER Parser. The manipulation leads to stack-based overflow. This vulnerability is listed as CVE-2025-54480. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Biosig libbiosig 3.9.0. This issue affects an unknown function of the file biosig.c of the component MFER Parser. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to 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). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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 8719 of biosig.c on the current master branch (35a819fa), when the Tag is 0: if (tag==0) { if (len!=1) fprintf(stderr,"Warning MFER tag0 incorrect length %i!=1\n",len); curPos += ifread(buf,1,len,hdr); }

The advisory is shared at talosintelligence.com. The identification of this vulnerability is CVE-2025-54480 since 07/23/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/03/2025).

The vulnerability scanner Nessus provides a plugin with the ID 260420 (Linux Distros Unpatched Vulnerability : CVE-2025-54480), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (260420) and EUVD (EUVD-2025-25683). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Biosig

Name

• libbiosig

Version

• 3.9.0

CPE 2.3info

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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