GHSA-jrm6-h9cq-8gqw

PyPDF2 quadratic runtime with malformed PDF missing xref marker

Source: GitHub Advisory Database (reviewed) Moderate CVE-2023-36810

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	PyPDF2	< 1.27.9	1.27.9

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact An attacker who uses this vulnerability can craft a PDF which leads to unexpected long runtime. This quadratic runtime blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. ### Patches https://github.com/py-pdf/pypdf/pull/808 ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ ### References * [PyPDF2 PR #808](https://github.com/py-pdf/pypdf/pull/808) * [PyPDF2 Issue #582](https://github.com/py-pdf/pypdf/issues/582)

References

External links from the advisory. They lead to third-party sites.

https://github.com/py-pdf/pypdf/security/advisories/GHSA-jrm6-h9cq-8gqw web
https://nvd.nist.gov/vuln/detail/CVE-2023-36810 advisory
https://github.com/py-pdf/pypdf/issues/582 web
https://github.com/py-pdf/pypdf/pull/808 web
https://github.com/py-pdf/pypdf/commit/c6c56f550bb384e05f0139c796ba1308837d6373 web
https://github.com/py-pdf/pypdf package
https://lists.debian.org/debian-lts-announce/2023/07/msg00019.html web