要点
- CVE-2023-46250 は pypdf, pypdf (pypdf project) に影響する深刻度「中」 (CVSS 5.5) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.25%（全脆弱性の 17.0% より高い）。
- 対処：3.17.0 以降に更新してください。
| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|
| pypdf PyPI | ≥ 3.7.0, < 3.17.0
| 3.17.0
|
| pypdf | ≥ 3.7.0, < 3.17.0
| 3.17.0
|
概要
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.
NVD の説明
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 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. The issue was fixed in version 3.17.0. As a workaround, apply the patch manually by modifying `pypdf/generic/_data_structures.py`.
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