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CVE-2021-21842

Estado: ModificadaAlta (8.8)—

Se presenta una vulnerabilidad de desbordamiento de enteros explotable dentro de la funcionalidad MPEG-4 decoding de GPAC Project on Advanced Content library versión v1.0.1. Una entrada MPEG-4 especialmente diseñada puede causar un desbordamiento de enteros cuando se procesa un átomo usando el código FOURCC "ssix", debido a una aritmética no comprobada, resultando en un desbordamiento del búfer en la región heap de la memoria que causa una corrupción de la memoria. Un atacante puede convencer a un usuario de que abra un vídeo para desencadenar esta vulnerabilidad.

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).

Tecnologías afectadas (2)

Debian — Debian LinuxGpac — Gpac

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-21842",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
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    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "talos-cna@cisco.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "exploitabilityScore": 2.8
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    "cvssMetricV31": [
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  "affected": [
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      "affectedData": [
        {
          "vendor": "n/a",
          "product": "GPAC Project",
          "versions": [
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              "status": "affected",
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  "published": "2021-08-25T19:15:09.110",
  "references": [
    {
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297",
      "tags": [
        "Exploit",
        "Third Party Advisory"
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      "source": "talos-cna@cisco.com"
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      "tags": [
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      "source": "talos-cna@cisco.com"
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    {
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "talos-cna@cisco.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-680"
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      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An exploitable integer overflow vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. A specially crafted MPEG-4 input can cause an integer overflow when processing an atom using the 'ssix' FOURCC code, due to unchecked arithmetic resulting in a heap-based buffer overflow that causes memory corruption. An attacker can convince a user to open a video to trigger this vulnerability."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de desbordamiento de enteros explotable dentro de la funcionalidad MPEG-4 decoding de GPAC Project on Advanced Content library versión v1.0.1. Una entrada MPEG-4 especialmente diseñada puede causar un desbordamiento de enteros cuando se procesa un átomo usando el código FOURCC \"ssix\", debido a una aritmética no comprobada, resultando en un desbordamiento del búfer en la región heap de la memoria que causa una corrupción de la memoria. Un atacante puede convencer a un usuario de que abra un vídeo para desencadenar esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T03:36:13.053",
  "configurations": [
    {
      "nodes": [
        {
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          "cpeMatch": [
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  "sourceIdentifier": "talos-cna@cisco.com"
}