ubuntu-cve-2025-54481
Vulnerability from osv_ubuntu
Published
2025-08-25 14:15
Modified
2026-05-20 15:22
Summary
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 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.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "biosig-tools",
            "binary_version": "2.3.3-1build2"
          },
          {
            "binary_name": "libbiosig3",
            "binary_version": "2.3.3-1build2"
          },
          {
            "binary_name": "octave-biosig",
            "binary_version": "2.3.3-1build2"
          },
          {
            "binary_name": "python3-biosig",
            "binary_version": "2.3.3-1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "biosig",
        "purl": "pkg:deb/ubuntu/biosig@2.3.3-1build2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.1.2-4",
        "2.1.2-4build1",
        "2.1.2-4build2",
        "2.3.3-1",
        "2.3.3-1build1",
        "2.3.3-1build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "biosig-tools",
            "binary_version": "2.6.0-1ubuntu1"
          },
          {
            "binary_name": "libbiosig3",
            "binary_version": "2.6.0-1ubuntu1"
          },
          {
            "binary_name": "octave-biosig",
            "binary_version": "2.6.0-1ubuntu1"
          },
          {
            "binary_name": "python3-biosig",
            "binary_version": "2.6.0-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "biosig",
        "purl": "pkg:deb/ubuntu/biosig@2.6.0-1ubuntu1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.5.0-1build2",
        "2.5.2-1",
        "2.5.2-1build1",
        "2.5.2-2",
        "2.6.0-1",
        "2.6.0-1build1",
        "2.6.0-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "biosig-tools",
            "binary_version": "3.9.0-1"
          },
          {
            "binary_name": "libbiosig3",
            "binary_version": "3.9.0-1"
          },
          {
            "binary_name": "octave-biosig",
            "binary_version": "3.9.0-1"
          },
          {
            "binary_name": "python3-biosig",
            "binary_version": "3.9.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "biosig",
        "purl": "pkg:deb/ubuntu/biosig@3.9.0-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.6.1-1build3",
        "3.9.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "biosig-tools",
            "binary_version": "3.9.0-1build3"
          },
          {
            "binary_name": "libbiosig3",
            "binary_version": "3.9.0-1build3"
          },
          {
            "binary_name": "octave-biosig",
            "binary_version": "3.9.0-1build3"
          },
          {
            "binary_name": "python3-biosig",
            "binary_version": "3.9.0-1build3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "biosig",
        "purl": "pkg:deb/ubuntu/biosig@3.9.0-1build3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.9.0-1",
        "3.9.0-1build1",
        "3.9.0-1build2",
        "3.9.0-1build3"
      ]
    }
  ],
  "aliases": [],
  "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 8744 of biosig.c on the current master branch (35a819fa), when the Tag is 3: \t\t\t\telse if (tag==3) { \t\t\t\t\t// character code \t\t\t\t\tchar v[17];\t\t// [1] \t\t\t\t\tif (len\u003e16) fprintf(stderr,\"Warning MFER tag2 incorrect length %i\u003e16\\n\",len); \t\t\t\t\tcurPos += ifread(\u0026v,1,len,hdr); \t\t\t\t\tv[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.",
  "id": "UBUNTU-CVE-2025-54481",
  "modified": "2026-05-20T15:22:55Z",
  "published": "2025-08-25T14:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-54481"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-54481"
    },
    {
      "type": "REPORT",
      "url": "https://sourceforge.net/p/biosig/mailman/message/59224259/"
    },
    {
      "type": "REPORT",
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2234"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-54481"
  ]
}



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