CVE-2023-25577
High resource usage when parsing multipart form data with many fields
描述
Werkzeug is a comprehensive WSGI web application library. Prior to version 2.2.3, Werkzeug's multipart form data parser will parse an unlimited number of parts, including file parts. Parts can be a small amount of bytes, but each requires CPU time to parse and may use more memory as Python data. If a request can be made to an endpoint that accesses `request.data`, `request.form`, `request.files`, or `request.get_data(parse_form_data=False)`, it can cause unexpectedly high resource usage. This allows an attacker to cause a denial of service by sending crafted multipart data to an endpoint that will parse it. The amount of CPU time required can block worker processes from handling legitimate requests. The amount of RAM required can trigger an out of memory kill of the process. Unlimited file parts can use up memory and file handles. If many concurrent requests are sent continuously, this can exhaust or kill all available workers. Version 2.2.3 contains a patch for this issue.
如何修補 CVE-2023-25577
要修補 CVE-2023-25577,請將受影響套件升級到下列已修補版本。
- —升級至 1.0.1+dfsg1-2+deb11u1 或更新版本
- —升級至 2.2.3 或更新版本
- —升級至 517cac5a804e8c4dc4ed038bb20dacd038e7a9f1 或更新版本
CVE-2023-25577 正在被利用嗎?
低 — EPSS 為 1.4%,目前沒有觀察到大規模利用活動。
受影響套件(3)
- from 0, < 1.0.1+dfsg1-2+deb11u1
- from 0, < 2.2.3
- from 0, < 517cac5a804e8c4dc4ed038bb20dacd038e7a9f1 | from 0, < 2.2.3
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |