CVE-2025-64512

Estado: ModificadaAlta (7.8)—

Pdfminer.six is a community maintained fork of the original PDFMiner, a tool for extracting information from PDF documents. Prior to version 20251107, pdfminer.six will execute arbitrary code from a malicious pickle file if provided with a malicious PDF file. The `CMapDB._load_data()` function in pdfminer.six uses `pickle.loads()` to deserialize pickle files. These pickle files are supposed to be part of the pdfminer.six distribution stored in the `cmap/` directory, but a malicious PDF can specify an alternative directory and filename as long as the filename ends in `.pickle.gz`. A malicious, zipped pickle file can then contain code which will automatically execute when the PDF is processed. Version 20251107 fixes the issue.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.31%
Percentil entre todas las CVEs puntuadas: 22
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1203 Exploitation for Client Executionexecution95 %
Impacto principalT1059 Command and Scripting Interpreterexecution90 %

Vector CVSS con UI:R (interacción del usuario: abrir PDF malicioso) y acceso local. CWE-502 (deserialización insegura de pickle) permite ejecución de código arbitrario. Se requiere que el usuario procese el PDF para disparar pickle.loads().

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

Restrict Web-Based Content Privileged Account Management Limit Software Installation Execution Prevention Behavior Prevention on Endpoint Disable or Remove Feature or Program

Tecnologías afectadas (2)

Debian — Debian Linux Pdfminer — Pdfminer.six

CWE

CWE-502

Referencias

JSON original (NVD)

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      "value": "Pdfminer.six is a community maintained fork of the original PDFMiner, a tool for extracting information from PDF documents. Prior to version 20251107, pdfminer.six will execute arbitrary code from a malicious pickle file if provided with a malicious PDF file. The `CMapDB._load_data()` function in pdfminer.six uses `pickle.loads()` to deserialize pickle files. These pickle files are supposed to be part of the pdfminer.six distribution stored in the `cmap/` directory, but a malicious PDF can specify an alternative directory and filename as long as the filename ends in `.pickle.gz`. A malicious, zipped pickle file can then contain code which will automatically execute when the PDF is processed. Version 20251107 fixes the issue."
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      "value": "Pdfminer.six es una bifurcación mantenida por la comunidad del PDFMiner original, una herramienta para extraer información de documentos PDF. Antes de la versión 20251107, pdfminer.six ejecutará código arbitrario de un archivo pickle malicioso si se le proporciona un archivo PDF malicioso. La función 'CMapDB._load_data()' en pdfminer.six utiliza 'pickle.loads()' para deserializar archivos pickle. Se supone que estos archivos pickle forman parte de la distribución de pdfminer.six almacenada en el directorio 'cmap/', pero un PDF malicioso puede especificar un directorio y nombre de archivo alternativos siempre que el nombre de archivo termine en '.pickle.gz'. Un archivo pickle malicioso y comprimido puede entonces contener código que se ejecutará automáticamente cuando se procese el PDF. La versión 20251107 corrige el problema."
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