GHSA-xg9f-g7g7-2323

Suggest an improvement
Source
https://github.com/advisories/GHSA-xg9f-g7g7-2323
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/02/GHSA-xg9f-g7g7-2323/GHSA-xg9f-g7g7-2323.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-xg9f-g7g7-2323
Aliases
Published
2023-02-15T15:36:26Z
Modified
2024-02-17T05:16:27.628280Z
Severity
  • CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
High resource usage when parsing multipart form data with many fields
Details

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.

References

Affected packages

PyPI / werkzeug

Package

Name
werkzeug
View open source insights on deps.dev
Purl
pkg:pypi/werkzeug

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0The exact introduced commit is unknown
Fixed
2.2.3

Affected versions

0.*

0.1
0.2
0.3
0.3.1
0.4
0.4.1
0.5
0.5.1
0.6
0.6.1
0.6.2
0.7
0.7.1
0.7.2
0.8
0.8.1
0.8.2
0.8.3
0.9
0.9.1
0.9.2
0.9.3
0.9.4
0.9.5
0.9.6
0.10
0.10.1
0.10.2
0.10.3
0.10.4
0.11
0.11.1
0.11.2
0.11.3
0.11.4
0.11.5
0.11.6
0.11.7
0.11.8
0.11.9
0.11.10
0.11.11
0.11.12
0.11.13
0.11.14
0.11.15
0.12
0.12.1
0.12.2
0.13
0.14
0.14.1
0.15.0
0.15.1
0.15.2
0.15.3
0.15.4
0.15.5
0.15.6
0.16.0
0.16.1

1.*

1.0.0rc1
1.0.0
1.0.1

2.*

2.0.0rc1
2.0.0rc2
2.0.0rc3
2.0.0rc4
2.0.0rc5
2.0.0
2.0.1
2.0.2
2.0.3
2.1.0
2.1.1
2.1.2
2.2.0a1
2.2.0
2.2.1
2.2.2

Ecosystem specific 

{
    "affected_functions": [
        "werkzeug.Request.from_values"
    ]
}