CVE-2024-49767: quart DoS — Fix

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

CWE-770 CWE-770

Affected Products

Vendor	Product	Versions
palletsprojects	quart	< 0.19.7
palletsprojects	werkzeug	< 3.0.6

References

Advisories & Patches

https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179b https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2

Other References

https://github.com/pallets/quart/commit/abb04a512496206de279225340ed022852fbf51f https://github.com/pallets/werkzeug/releases/tag/3.0.6 https://security.netapp.com/advisory/ntap-20250103-0007/

Frequently Asked Questions

What is CVE-2024-49767? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-49767? +

CVE-2024-49767 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-49767? +

CVE-2024-49767 affects products from palletsprojects, specifically: quart, werkzeug. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-49767? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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