Description
pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0, an attacker can craft a PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode filters is used on a malicious cross-reference stream. Other content streams are affected on explicit access. This issue has been fixed in 6.0.0. If an update is not possible, a workaround involves including the fixed code from pypdf.filters.decompress into the existing filters file.
Problem types
CWE-400: Uncontrolled Resource Consumption
CWE-770: Allocation of Resources Without Limits or Throttling
Product status
References
github.com/.../pypdf/security/advisories/GHSA-7hfw-26vp-jp8m
github.com/py-pdf/pypdf/issues/3429
github.com/py-pdf/pypdf/pull/3430
github.com/...cdb63f0fb43d8a6b3d222b6946595/pypdf/filters.py
github.com/py-pdf/pypdf/releases/tag/6.0.0
