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CVE-2021-29464

Status: ModifiedHigh (7.8)—

Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A heap buffer overflow was found in Exiv2 versions v0.27.3 and earlier. The heap overflow is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as `insert`. The bug is fixed in version v0.27.4.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Exiv2 — Exiv2Fedoraproject — Fedora

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-29464",
  "cveTags": [],
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          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
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      "value": "Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A heap buffer overflow was found in Exiv2 versions v0.27.3 and earlier. The heap overflow is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when writing the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as `insert`. The bug is fixed in version v0.27.4."
    },
    {
      "lang": "es",
      "value": "Exiv2 es una utilidad de línea de comandos y una biblioteca C++ para leer, escribir, eliminar y modificar los metadatos de archivos de imagen.&#xa0;Se encontró un desbordamiento del búfer de la memoria en Exiv2 versiones v0.27.3 y anteriores.&#xa0;El desbordamiento de la pila es activada cuando se usa Exiv2 para escribir metadatos en un archivo de imagen diseñado.&#xa0;Un atacante podría explotar potencialmente la vulnerabilidad para conseguir una ejecución del código, si puede engañar a la víctima para ejecutar Exiv2 en un archivo de imagen diseñado.&#xa0;Tome en cuenta que este bug solo es activado al escribir los metadatos, que es una operación Exiv2 que es usado con menos frecuencia que leer los metadatos.&#xa0;Por ejemplo, para desencadenar el bug en la aplicación de línea de comandos Exiv2, es necesario agregar un argumento de línea de comando adicional como \"insert\".&#xa0;El bug se corrigió en la versión v0.27.4."
    }
  ],
  "lastModified": "2026-06-17T03:47:41.700",
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