Possible Infinite Loop when PdfWriter(clone_from) is used with a PDF
### 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.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2023-46250US | medium5.5 | — | ||
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions 3.7.0 through 3.16.4 can craft a PDF which leads to an infinite lo… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-wjcc-cq79-p63fADVISORY
- https://github.com/py-pdf/pypdfPACKAGE
- https://github.com/py-pdf/pypdf/commit/9b23ac3c9619492570011d551d521690de9a3e2dWEB
- https://github.com/py-pdf/pypdf/pull/2264WEB
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-wjcc-cq79-p63fWEB
- https://nvd.nist.gov/vuln/detail/CVE-2023-46250ADVISORY
- https://pypi.org/project/pypdfPACKAGE
Advisories like this name the exposed products attackers go after on your perimeter. See what is exposed on your perimeter with a free passive scan.
Free scan