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.
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Wed, 06 Nov 2024 20:15:00 +0000
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2023-06-30T18:38:10.303Z
Updated: 2024-11-06T19:51:43.120Z
Reserved: 2023-06-27T15:43:18.383Z
Link: CVE-2023-36807
Vulnrichment
Updated: 2024-08-02T17:01:09.484Z
NVD
Status : Modified
Published: 2023-06-30T19:15:09.283
Modified: 2024-11-21T08:10:38.247
Link: CVE-2023-36807
Redhat
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