CVE-2023-25577

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.

CVSS v3.0 7.5 HIGH

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/pallets/werkzeug/commit/517cac5a804e8c4dc4ed038bb20dacd038e7a9f1	Patch
https://github.com/pallets/werkzeug/releases/tag/2.2.3	Release Notes
https://github.com/pallets/werkzeug/security/advisories/GHSA-xg9f-g7g7-2323	Vendor Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:palletsprojects:werkzeug:*:*:*:*:*:*:*:*

Information

Published : 2023-02-14 12:15

Updated : 2023-02-23 14:21

NVD link : CVE-2023-25577

Mitre link : CVE-2023-25577

JSON object : View

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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Products Affected

palletsprojects

werkzeug

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