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CVE-2023-36464

Infinite Loop when a comment isn't followed by a character in pypdf

pypdf is an open source, pure-python PDF library. In affected versions an attacker may craft a PDF which leads to an infinite loop if `__parse_content_stream` is executed. That is, for example, the case if the user extracted text from such a PDF. This issue was introduced in pull request #969 and resolved in pull request #1828. Users are advised to upgrade. Users unable to upgrade may modify the line `while peek not in (b"\r", b"\n")` in `pypdf/generic/_data_structures.py` to `while peek not in (b"\r", b"\n", b"")`.

CVSS 3.1 · 6.2 Medium EPSS < 1% KEV · Not listed
Vendors
Py-pdf Pypdf2 Project
Products
Pypdf Pypdf2
CVE-2022-24859

Manipulated inline images can cause Infinite Loop in PyPDF2

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.

CVSS 3.1 · 6.2 Medium EPSS 1.3% KEV · Not listed
Vendors
Debian Pypdf2 Project
Products
Debian Linux Pypdf2