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CVE-2025-70085

Estado: AnalizadaCrítica (9.8)—

An issue was discovered in OpenSatKit 2.2.1. The EventErrStr buffer has a fixed size of 256 bytes. The code uses sprintf to format two filenames (Source1Filename and the string returned by FileUtil_FileStateStr) into this buffer without any length checking and without using bounded format specifiers such as %.*s. If the filename length approaches OS_MAX_PATH_LEN (commonly 64-256 bytes), the combined formatted string together with constant text can exceed 256 bytes, resulting in a stack buffer overflow. Such unsafe sprintf calls are scattered across multiple functions in file.c, including FILE_ConcatenateCmd() and ConcatenateFiles(), all of which fail to validate the output length.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector CVSS AV:N sin autenticación (PR:N) ni interacción (UI:N) indica acceso remoto sin privilegios (T1190). El desbordamiento de búfer permite ejecución de código arbitrario (T1059) y potencialmente escalada local (T1068).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareVulnerability Scanning

Tecnologías afectadas (1)

Opensatkit — Opensatkit

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-70085",
  "cveTags": [],
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-70085",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-12T14:59:17.770981Z"
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    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "exploitabilityScore": 3.9
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  "published": "2026-02-11T18:16:06.600",
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      "url": "https://gist.github.com/jonafk555",
      "tags": [
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      "url": "https://github.com/OpenSatKit/OpenSatKit",
      "tags": [
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      "source": "cve@mitre.org"
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    {
      "url": "https://github.com/OpenSatKit/OpenSatKit/releases/tag/v2.2.1",
      "tags": [
        "Release Notes"
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://raw.githubusercontent.com/OpenSatKit/OpenSatKit/master/cfs/apps/filemgr/fsw/src/file.c",
      "tags": [
        "Third Party Advisory"
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      "source": "cve@mitre.org"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
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          "lang": "en",
          "value": "CWE-121"
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  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in OpenSatKit 2.2.1. The EventErrStr buffer has a fixed size of 256 bytes. The code uses sprintf to format two filenames (Source1Filename and the string returned by FileUtil_FileStateStr) into this buffer without any length checking and without using bounded format specifiers such as %.*s. If the filename length approaches OS_MAX_PATH_LEN (commonly 64-256 bytes), the combined formatted string together with constant text can exceed 256 bytes, resulting in a stack buffer overflow. Such unsafe sprintf calls are scattered across multiple functions in file.c, including FILE_ConcatenateCmd() and ConcatenateFiles(), all of which fail to validate the output length."
    },
    {
      "lang": "es",
      "value": "Se descubrió un problema en OpenSatKit 2.2.1. El búfer EventErrStr tiene un tamaño fijo de 256 bytes. El código utiliza sprintf para formatear dos nombres de archivo (Source1Filename y la cadena devuelta por FileUtil_FileStateStr) en este búfer sin ninguna comprobación de longitud y sin utilizar especificadores de formato acotados como %.*s. Si la longitud del nombre de archivo se acerca a OS_MAX_PATH_LEN (comúnmente 64-256 bytes), la cadena formateada combinada junto con el texto constante puede exceder los 256 bytes, lo que resulta en un desbordamiento de búfer de pila. Dichas llamadas inseguras a sprintf están dispersas en múltiples funciones en file.c, incluyendo FILE_ConcatenateCmd() y ConcatenateFiles(), todas las cuales no validan la longitud de la salida."
    }
  ],
  "lastModified": "2026-06-17T10:03:07.327",
  "configurations": [
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