GHSA-wjcc-cq79-p63f

Dashboard / Vulnerabilities / GHSA-wjcc-cq79-p63f

GHSA-wjcc-cq79-p63f

Summary: Possible Infinite Loop when PdfWriter(clone_from) is used with a PDF

Details: ### Impact An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This infinite loop blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. That is, for example, the case when the pypdf-user manipulates an incoming malicious PDF e.g. by merging it with another PDF or by adding annotations. ### Patches The issue was fixed with #2264 ### Workarounds If you cannot update your version of pypdf, you should modify `pypdf/generic/_data_structures.py` just like #2264 did.

References: https://github.com/py-pdf/pypdf/security/advisories/GHSA-wjcc-cq79-p63f, https://nvd.nist.gov/vuln/detail/CVE-2023-46250, https://github.com/py-pdf/pypdf/pull/2264, https://github.com/py-pdf/pypdf/commit/9b23ac3c9619492570011d551d521690de9a3e2d, https://github.com/py-pdf/pypdf