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Vulnerability CVE-2023-36807
Published: 2023-06-30
| Description: |
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. |
Type:
CWE-835 (Loop with Unreachable Exit Condition ('Infinite Loop'))
References: |
https://github.com/py-pdf/pypdf/pull/1331
https://github.com/py-pdf/pypdf/issues/1329
https://github.com/py-pdf/pypdf/security/advisories/GHSA-hm9v-vj3r-r55m
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