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.
How to fix CVE-2024-49767
To remediate CVE-2024-49767, upgrade the affected package to a fixed version below.
- —upgrade to 3.0.6-r0 or later
- —upgrade to 2.2.2-3+deb12u1 or later
- —no fix listed
- —upgrade to 0.20.0 or later
- —upgrade to 3.0.6 or later
Is CVE-2024-49767 being exploited?
Low — EPSS is 1.1%, meaning exploitation activity has not been observed at scale.
Affected packages (5)
- from 0, < 3.0.6-r0
- from 0, < 2.2.2-3+deb12u1
- from 0
- from 0, < 0.20.0
- >= 2.0.0rc1, < 3.0.6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |