A Werkzeug security update has been released for Ubuntu 16.04 LTS and 18.04 LTS.

USN-4655-1: Werkzeug vulnerabilities

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Ubuntu Security Notice USN-4655-1
December 01, 2020

python-werkzeug vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Werkzeug.

Software Description:
- python-werkzeug: collection of utilities for WSGI applications (Python 2.x)

Details:

It was discovered that Werkzeug has insufficient debugger PIN randomness.
An attacker could use this issue to access sensitive information. This issue only
affected Ubuntu 18.04 LTS. (CVE-2019-14806)

It was discovered that Werkzeug incorrectly handled certain URLs.
An attacker could possibly use this issue to cause pishing attacks.
This issue only affected Ubuntu 16.04 LTS. (CVE-2020-28724)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
python-werkzeug 0.14.1+dfsg1-1ubuntu0.1
python3-werkzeug 0.14.1+dfsg1-1ubuntu0.1

Ubuntu 16.04 LTS:
python-werkzeug 0.10.4+dfsg1-1ubuntu1.2
python3-werkzeug 0.10.4+dfsg1-1ubuntu1.2

In general, a standard system update will make all the necessary changes.

References:
  https://usn.ubuntu.com/4655-1
CVE-2019-14806, CVE-2020-28724

Package Information:
  https://launchpad.net/ubuntu/+source/python-werkzeug/0.14.1+dfsg1-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/python-werkzeug/0.10.4+dfsg1-1ubuntu1.2