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CVE-2024-49767— Werkzeug possible resource exhaustion when parsing file data in forms

Quick assessment

Affected
pallets werkzeug
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Werkzeug是Pallets开源的一个全面的 WSGI web 应用程序库。 Werkzeug 3.0.6之前版本存在安全漏洞，该漏洞源于解析multipart/form-data请求时，容易受到拒绝服务攻击。

AI Predicted 5.9 Difficulty: Easy EPSS 1.09% · P64

Affected Version Matrix 2

VendorProduct Version RangeStatus
pallets Quart < 0.20.0 affected
pallets werkzeug >= 2.0.0rc1, < 3.0.6 affected
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I. Basic Information for CVE-2024-49767

Vulnerability Information
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Vulnerability Title
Werkzeug possible resource exhaustion when parsing file data in forms
Source: CVE Program / CVE List V5
Vulnerability Description
Werkzeug is a Web Server Gateway Interface web application library. Applications using `werkzeug.formparser.MultiPartParser` corresponding to a version of Werkzeug prior to 3.0.6 to parse `multipart/form-data` requests (e.g. all flask applications) are vulnerable to a relatively simple but effective resource exhaustion (denial of service) attack. A specifically crafted form submission request can cause the parser to allocate and block 3 to 8 times the upload size in main memory. There is no upper limit; a single upload at 1 Gbit/s can exhaust 32 GB of RAM in less than 60 seconds. Werkzeug version 3.0.6 fixes this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Werkzeug 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Werkzeug是Pallets开源的一个全面的 WSGI web 应用程序库。 Werkzeug 3.0.6之前版本存在安全漏洞，该漏洞源于解析multipart/form-data请求时，容易受到拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pallets werkzeug >= 2.0.0rc1, < 3.0.6 -
pallets Quart < 0.20.0 -

II. Public POCs for CVE-2024-49767

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III. Intelligence Information for CVE-2024-49767

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Patches & Fixes for CVE-2024-49767 (2)

IV. Related Vulnerabilities

Same product: werkzeug
Same vendor: pallets
Same weakness: CWE-400

V. Comments for CVE-2024-49767

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