ghsa-fq33-769w-5p63
Vulnerability from github
Published
2025-08-25 15:32
Modified
2025-11-03 21:34
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 9090 of biosig.c on the current master branch (35a819fa), when the Tag is 64:

            else if (tag==64)     //0x40
            {
                // preamble
                char tmp[256];  // [1]
                curPos += ifread(tmp,1,len,hdr);

In this case, the overflowed buffer is the newly-declared tmp [1] instead of buf. While tmp is larger than buf, having a size of 256 bytes, a stack overflow can still occur in cases where len is encoded using multiple octets and is greater than 256.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-54490"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-25T14:15:35Z",
    "severity": "CRITICAL"
  },
  "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 9090 of biosig.c on the current master branch (35a819fa), when the Tag is 64:\n\n                else if (tag==64)     //0x40\n                {\n                    // preamble\n                    char tmp[256];  // [1]\n                    curPos += ifread(tmp,1,len,hdr);\n\nIn this case, the overflowed buffer is the newly-declared `tmp` \\[1\\] instead of `buf`. While `tmp` is larger than `buf`, having a size of 256 bytes, a stack overflow can still occur in cases where `len` is encoded using multiple octets and is greater than 256.",
  "id": "GHSA-fq33-769w-5p63",
  "modified": "2025-11-03T21:34:23Z",
  "published": "2025-08-25T15:32:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54490"
    },
    {
      "type": "WEB",
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2234"
    },
    {
      "type": "WEB",
      "url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2234"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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