Debian 9812 Published by

A python-werkzeug security update has been released for Debian GNU/Linux 8 and 9 Extended LTS to address multiple vulnerabilities.

ELA-897-1 python-werkzeug security update

Package : python-werkzeug
Version : 0.9.6+dfsg-1+deb8u3 (jessie), 0.11.15+dfsg1-1+deb9u2 (stretch)

Related CVEs :

Multiple vulnerabilities were found in Werkzeug, a comprehensive WSGI web application library written in python.

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

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.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.

ELA-897-1 python-werkzeug security update