CVE-2025-54481: Buffer Overflow
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-54481?
CVE-2025-54481 has a high severity rating due to its potential for arbitrary code execution.
How do I fix CVE-2025-54481?
To fix CVE-2025-54481, update The Biosig Project libbiosig to the latest version that addresses this vulnerability.
What causes the CVE-2025-54481 vulnerability?
CVE-2025-54481 is caused by a stack-based buffer overflow in the MFER parsing functionality of libbiosig.
What should I do if I am using an affected version of libbiosig regarding CVE-2025-54481?
If using an affected version of libbiosig, immediately replace or update the library to mitigate the risk of exploitation from CVE-2025-54481.
Can CVE-2025-54481 be exploited remotely?
Yes, CVE-2025-54481 can be exploited remotely if an attacker provides a specially crafted MFER file.