pdfminer.six vulnerable to Arbitrary Code Execution via Crafted PDF Input

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:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

可信数据的反序列化

pdfminer.six 代码问题漏洞

pdfminer.six是pdfminer开源的一款用于从PDF文档中提取信息的工具。 pdfminer.six 20251107之前版本存在代码问题漏洞，该漏洞源于CMapDB._load_data函数使用pickle.loads反序列化恶意pickle文件，可能导致执行任意代码。

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