py-pdf/pypdf · Security
PyPDF2 quadratic runtime with malformed PDF missing xref marker
- GHSA ID
- GHSA-jrm6-h9cq-8gqw
- CVE ID
- CVE-2023-36810
- Severity
- medium
- Published
- Updated
- CVSS
- 6.2 · CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 6.2 · CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
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
CWEs
- CWE-407 · Inefficient Algorithmic Complexity
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-jrm6-h9cq-8gqw ↗
- https://nvd.nist.gov/vuln/detail/CVE-2023-36810 ↗
- https://github.com/py-pdf/pypdf/issues/582 ↗
- https://github.com/py-pdf/pypdf/pull/808 ↗
- https://github.com/py-pdf/pypdf/commit/c6c56f550bb384e05f0139c796ba1308837d6373 ↗
- https://lists.debian.org/debian-lts-announce/2023/07/msg00019.html ↗
- https://github.com/advisories/GHSA-jrm6-h9cq-8gqw ↗