{"id":"DEBIAN-CVE-2025-54487","details":"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:\r \r                 else if (tag==12)    //0x0C\r                 {\r                     // sampling resolution\r                     if (len\u003e6) fprintf(stderr,\"Warning MFER tag12 incorrect length %i\u003e6\\n\",len);\r                     val32   = 0;\r                     int8_t  v8;\r                     curPos += ifread(&UnitCode,1,1,hdr);\r                     curPos += ifread(&v8,1,1,hdr);\r                     curPos += ifread(buf,1,len-2,hdr);\r \r 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.","modified":"2026-09-01T20:05:54.506012087Z","published":"2025-08-25T14:15:34.860Z","upstream":["CVE-2025-54487"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-54487"}],"affected":[{"package":{"name":"biosig","ecosystem":"Debian:12","purl":"pkg:deb/debian/biosig?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.0-1","2.5.2-1","2.5.2-2","2.6.0-1","2.6.1-1","3.9.0-1","3.9.5-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-54487.json"}},{"package":{"name":"biosig","ecosystem":"Debian:13","purl":"pkg:deb/debian/biosig?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.9.0-1","3.9.5-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-54487.json"}},{"package":{"name":"biosig","ecosystem":"Debian:14","purl":"pkg:deb/debian/biosig?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.9.5-1"}]}],"versions":["3.9.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-54487.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}