7.5
HIGH
CVE-2024-49767
Flask Werkzeug Multipart Form Data Denial of Service 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.

INFO

Published Date :

Oct. 25, 2024, 8:15 p.m.

Last Modified :

Nov. 5, 2024, 8:03 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2024-49767 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Palletsprojects werkzeug
2 Palletsprojects quart
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2024-49767.

URL Resource
https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee Patch
https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179b Patch
https://github.com/pallets/werkzeug/releases/tag/3.0.6 Release Notes
https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2 Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-49767 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-49767 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Nov. 05, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee No Types Assigned https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee Patch
    Changed Reference Type https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179b No Types Assigned https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179b Patch
    Changed Reference Type https://github.com/pallets/werkzeug/releases/tag/3.0.6 No Types Assigned https://github.com/pallets/werkzeug/releases/tag/3.0.6 Release Notes
    Changed Reference Type https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2 No Types Assigned https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2 Vendor Advisory
    Added CPE Configuration OR *cpe:2.3:a:palletsprojects:quart:*:*:*:*:*:python:*:* versions up to (excluding) 0.19.7 *cpe:2.3:a:palletsprojects:werkzeug:*:*:*:*:*:*:*:* versions up to (excluding) 3.0.6
  • CVE Received by [email protected]

    Oct. 25, 2024

    Action Type Old Value New Value
    Added 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.
    Added Reference GitHub, Inc. https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2 [No types assigned]
    Added Reference GitHub, Inc. https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee [No types assigned]
    Added Reference GitHub, Inc. https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179b [No types assigned]
    Added Reference GitHub, Inc. https://github.com/pallets/werkzeug/releases/tag/3.0.6 [No types assigned]
    Added CWE GitHub, Inc. CWE-770
    Added CWE GitHub, Inc. CWE-400
    Added CVSS V4.0 GitHub, Inc. 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-49767 is associated with the following CWEs:

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability