Debian LTS: DLA-3346-1: python-werkzeug security update
Summary
CVE-2023-23934
Werkzeug will parse the cookie `=__Host-test=bad` as
__Host-test=bad`. If a Werkzeug application is running next to a
vulnerable or malicious subdomain which sets such a cookie using a
vulnerable browser, the Werkzeug application will see the bad
cookie value but the valid cookie key. Browsers may allow
"nameless" cookies that look like `=value` instead of
`key=value`. A vulnerable browser may allow a compromised
application on an adjacent subdomain to exploit this to set a
cookie like `=__Host-test=bad` for another subdomain.
CVE-2023-25577
Werkzeug's multipart form data parser will parse an unlimited
number of parts, including file parts. Parts can be a small amount
of bytes, but each requires CPU time to parse and may use more
memory as Python data. If a request can be made to an endpoint
that accesses `request.data`, `request.form`, `request.files`, or
`request.get_data(parse_form_data=False)`, it can cause
unexpectedly high resource usage. This allows an attacker to cause
a denial of service by sending crafted multipart data to an
endpoint that will parse it.
For Debian 10 buster, these problems have been fixed in version
0.14.1+dfsg1-4+deb10u2.
We recommend that you upgrade your python-werkzeug packages.
For the detailed security status of python-werkzeug please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/python-werkzeug
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
