medium5.1
CVE-2023-46250
Possible Infinite Loop when PdfWriter(clone_from) is used with a PDF
Impact
### 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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | pypdf | >= 3.7.0, < 3.17.0 | 3.17.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Pypdf Project | Pypdf | from 3.7.0 before 3.17.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/py-pdf/pypdf/commit/9b23ac3c9619492570011d551d521690de9a3e2d
- https://github.com/py-pdf/pypdf/pull/2264
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-wjcc-cq79-p63f
- https://github.com/advisories/GHSA-wjcc-cq79-p63f
- https://nvd.nist.gov/vuln/detail/CVE-2023-46250