CVE-2023-46250
Possible Infinite Loop when PdfWriter(clone_from) is used with a PDF
Description
### 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.
How to fix CVE-2023-46250
To remediate CVE-2023-46250, upgrade the affected package to a fixed version below.
- —upgrade to 3.17.0 or later
Is CVE-2023-46250 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 3.7.0, < 3.17.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.1 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |