CVE-2023-46136
Description
Werkzeug is a comprehensive WSGI web application library. If an upload of a file that starts with CR or LF and then is followed by megabytes of data without these characters: all of these bytes are appended chunk by chunk into internal bytearray and lookup for boundary is performed on growing buffer. This allows an attacker to cause a denial of service by sending crafted multipart data to an endpoint that will parse it. The amount of CPU time required can block worker processes from handling legitimate requests. This vulnerability has been patched in version 3.0.1.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 3.0.1-2 |
| sid | Fixed | 3.0.1-2 |
| forky | Fixed | 3.0.1-2 |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 2.2.2-3+deb12u1 |
References
- https://github.com/pallets/werkzeug/commit/f3c803b3ade485a45f12b6d6617595350c0f03e2
- https://github.com/pallets/werkzeug/security/advisories/GHSA-hrfv-mqp8-q5rw
- https://security.netapp.com/advisory/ntap-20231124-0008/
- https://nvd.nist.gov/vuln/detail/CVE-2023-46136
- https://github.com/pallets/werkzeug/commit/b1916c0c083e0be1c9d887ee2f3d696922bfc5c1
- https://github.com/pallets/werkzeug/commit/cbb446fdcada7685fce936ded01b76c08dbd6eb5
- https://github.com/pallets/werkzeug/commit/f2300208d5e2a5076cbbb4c2aad71096fd040ef9
- https://github.com/pallets/werkzeug
- https://github.com/pypa/advisory-database/tree/main/vulns/werkzeug/PYSEC-2023-221.yaml
- https://security.netapp.com/advisory/ntap-20231124-0008
- https://www.suse.com/security/cve/CVE-2023-46136.html
- https://security-tracker.debian.org/tracker/CVE-2023-46136
- https://github.com/advisories/GHSA-hrfv-mqp8-q5rw
CWEs
CWE-400 CWE-407 CWE-787
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.