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cve/2025/CVE-2025-54487.md
0xMarcio cb00e1339f Update CVE list 2025-09-29 21:09
2025-09-29 21:09:30 +02:00

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CVE-2025-54487

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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