| Name | CVE-2024-49767 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1086062, 1086063 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| python-werkzeug (PTS) | bullseye (security), bullseye | 1.0.1+dfsg1-2+deb11u1 | fixed |
| bookworm | 2.2.2-3 | vulnerable |
| sid, trixie | 3.1.3-2 | fixed |
| quart (PTS) | bullseye | 0.14.1-1 | vulnerable |
| bookworm | 0.18.3-2 | vulnerable |
| trixie | 0.19.9-1 | fixed |
| sid | 0.20.0-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - python-werkzeug <no-dsa> (Minor issue; can be fixed via point release)
[bullseye] - python-werkzeug <not-affected> (Vulnerable code introduced later)
[bookworm] - quart <no-dsa> (Minor issue)
[bullseye] - quart <postponed> (Minor issue; can be fixed in next update)
https://github.com/pallets/werkzeug/security/advisories/GHSA-q34m-jh98-gwm2
Introduced by: https://github.com/pallets/werkzeug/commit/cbb446fdcada7685fce936ded01b76c08dbd6eb5 (2.0.0rc1)
Fixed by: https://github.com/pallets/werkzeug/commit/8760275afb72bd10b57d92cb4d52abf759b2f3a7 (3.0.6)
Fixed by: https://github.com/pallets/quart/commit/5e78c4169b8eb66b91ead3e62d44721b9e1644ee (0.19.7)