CVE-2024-49767

Werkzeug possible resource exhaustion when parsing file data in forms

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.

Category

6.9
CVSS
Severity: Medium
CVSS 4.0 •
CVSS 3.1 •
EPSS 0.87% Top 30%
Vendor Advisory github.com
Affected: pallets werkzeug
Published at:
Updated at:

References

Link Tags
https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2 vendor advisory
https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee patch
https://github.com/pallets/quart/commit/abb04a512496206de279225340ed022852fbf51f
https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179b patch
https://github.com/pallets/werkzeug/releases/tag/3.0.6 release notes
https://security.netapp.com/advisory/ntap-20250103-0007/

Frequently Asked Questions

What is the severity of CVE-2024-49767?
CVE-2024-49767 has been scored as a medium severity vulnerability.
How to fix CVE-2024-49767?
To fix CVE-2024-49767, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-49767 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-49767 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-49767?
CVE-2024-49767 affects pallets werkzeug.
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