CVE-2022-24859 | BDVDB-2026-174381 Detail
py-pdfPyPDF2
Description#
PyPDF2 is an open source python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. In versions prior to 1.27.5 an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop if the PyPDF2 if the code attempts to get the content stream. The reason is that the last while-loop in `ContentStream._readInlineImage` only terminates when it finds the `EI` token, but never actually checks if the stream has already ended. This issue has been resolved in version `1.27.5`. Users unable to upgrade should validate and PDFs prior to iterating over their content stream.
Impact#
Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: local.
Weaknesses#
- CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
References#
- https://github.com/py-pdf/PyPDF2/security/advisories/GHSA-xcjx-m2pj-8g79
- https://github.com/py-pdf/PyPDF2/issues/329
- https://github.com/py-pdf/PyPDF2/pull/740
- https://github.com/py-pdf/PyPDF2/releases/tag/1.27.5
- https://lists.debian.org/debian-lts-announce/2022/06/msg00001.html
- https://lists.debian.org/debian-lts-announce/2023/06/msg00013.html
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.