CVE-2025-54489_CVE-2025-54489

{
    "lastseen": "",
    "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 8970 of biosig.c on the current master branch (35a819fa), when the Tag is 63:\r\n\r\n                else if (tag==63) {\r\n                    uint8_t tag2=255, len2=255;\r\n\r\n                    count = 0;\r\n                    while ((count<len) && !(FlagInfiniteLength && len2==0 && tag2==0)){\r\n                        curPos += ifread(&tag2,1,1,hdr);\r\n                        curPos += ifread(&len2,1,1,hdr);\r\n                        if (VERBOSE_LEVEL==9)\r\n                            fprintf(stdout,\"MFER: tag=%3i chan=%2i len=%-4i tag2=%3i len2=%3i curPos=%i %li count=%4i\\n\",tag,chan,len,tag2,len2,curPos,iftell(hdr),(int)count);\r\n\r\n                        if (FlagInfiniteLength && len2==0 && tag2==0) break;\r\n\r\n                        count  += (2+len2);\r\n                        curPos += ifread(&buf,1,len2,hdr);\r\n\r\nHere, the number of bytes read is not the Data Length decoded from the current frame in the file (`len`) but rather is a new length contained in a single octet read from the same input file (`len2`). Despite this, a stack-based buffer overflow condition can still occur, as the destination buffer is still `buf`, which has a size of only 128 bytes, while `len2` can be as large as 255.",
    "published": "2025-08-25T13:53:46.340Z",
    "modified": "2025-08-25T13:53:46.340Z",
    "type": "cve",
    "title": "CVE-2025-54489",
    "source": "talos",
    "references": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2234",
    "id": "CVE-2025-54489",
    "bulletinFamily": "",
    "cwe": [
        "CWE-121"
    ],
    "cvelist": null,
    "sourceData": "The Biosig Project libbiosig 3.9.0\nThe Biosig Project libbiosig Master Branch (35a819fa)",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "libbiosig",
    "version": "3.9.0",
    "vendor": "The Biosig Project",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}