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CVE-2023-36807

CVE-2023-36807 · Infinite Loop when reading malformed objects in pypdf

This page contains facts from public vulnerability sources. Check the original advisory before updating.

pypdf is a pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. In version 2.10.5 an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This infinite loop blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. That is, for example, the case if the user extracted metadata from such a malformed PDF. Versions prior to 2.10.5 throw an error, but do not hang forever. This issue was fixed with https://github.com/py-pdf/pypdf/pull/1331 which has been included in release 2.10.6. Users are advised to upgrade. Users unable to upgrade should modify `PyPDF2/generic/_data_structures.py::read_object` to an an error throwing case. See GHSA-hm9v-vj3r-r55m for details.

CVSS 6.2 · Medium · EPSS 0.6% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • pypdf

    Versions
    • 2.10.5: Affected

    No fix published

  • pypdf2 Debian:12

    Affected ranges
    • ECOSYSTEM: < 2.10.7-1

    Update to 2.10.7-1

  • pypdf2 PyPI

    Versions
    • 2.10.5
    Affected ranges
    • ECOSYSTEM: ≥ 2.10.5, < 2.10.6

    Update to 2.10.6

Original sources

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