Bug#1054553: python-werkzeug: CVE-2023-46136

[Salvatore Bonaccorso]

Source: python-werkzeug
Version: 2.2.2-3
Severity: important
Tags: security upstream
X-Debbugs-Cc: car...@debian.org, Debian Security Team <te...@security.debian.org>

Hi,

The following vulnerability was published for python-werkzeug.

CVE-2023-46136[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2023-46136
https://www.cve.org/CVERecord?id=CVE-2023-46136
[1] https://github.com/pallets/werkzeug/security/advisories/GHSA-hrfv-mqp8-q5rw
[2] https://github.com/pallets/werkzeug/commit/b1916c0c083e0be1c9d887ee2f3d696922bfc5c1

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore