CVE-2024-49767
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…
Does this matter?
Lower severity and a low EPSS score (1.09%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 4.0
- 6.9 MEDIUMCVSS: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/M
- EPSS
- 1.09% probability · 64th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400, CWE-770
- Affected
- palletsprojects/quart · palletsprojects/werkzeug
- Source
- security-advisories@github.com
References
- https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644eePatch
- https://github.com/pallets/quart/commit/abb04a512496206de279225340ed022852fbf51f
- https://github.com/pallets/werkzeug/commit/50cfeebcb0727e18cc52ffbeb125f4a66551179bPatch
- https://github.com/pallets/werkzeug/releases/tag/3.0.6Release Notes
- https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2Vendor Advisory
- https://security.netapp.com/advisory/ntap-20250103-0007/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.