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cve/2025/CVE-2025-54481.md
0xMarcio cb00e1339f Update CVE list 2025-09-29 21:09
2025-09-29 21:09:30 +02:00

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CVE-2025-54481

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.

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