A Werkzeug security update has been released for Ubuntu Linux 16.04 ESM, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 22.10.

USN-5948-1: Werkzeug vulnerabilities

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Ubuntu Security Notice USN-5948-1
March 13, 2023

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

- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM

Summary:

Several security issues were fixed in Werkzeug.

Software Description:
- python-werkzeug: documentation for the werkzeug Python library (docs)

Details:

It was discovered that Werkzeug did not properly handle the parsing of
nameless cookies. A remote attacker could possibly use this issue to
shadow other cookies. (CVE-2023-23934)

It was discovered that Werkzeug could be made to process unlimited number
of multipart form data parts. A remote attacker could possibly use this
issue to cause Werkzeug to consume resources, leading to a denial of
service. (CVE-2023-25577)

Update instructions:

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

Ubuntu 22.10:
python3-werkzeug 2.0.2+dfsg1-3ubuntu0.22.10.1

Ubuntu 22.04 LTS:
python3-werkzeug 2.0.2+dfsg1-1ubuntu0.22.04.1

Ubuntu 20.04 LTS:
python3-werkzeug 0.16.1+dfsg1-2ubuntu0.1

Ubuntu 18.04 LTS:
python-werkzeug 0.14.1+dfsg1-1ubuntu0.2
python3-werkzeug 0.14.1+dfsg1-1ubuntu0.2

Ubuntu 16.04 ESM:
python-werkzeug 0.10.4+dfsg1-1ubuntu1.2+esm1
python3-werkzeug 0.10.4+dfsg1-1ubuntu1.2+esm1

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

References:
https://ubuntu.com/security/notices/USN-5948-1
CVE-2023-23934, CVE-2023-25577

Package Information:
https://launchpad.net/ubuntu/+source/python-werkzeug/2.0.2+dfsg1-3ubuntu0.22.10.1
https://launchpad.net/ubuntu/+source/python-werkzeug/2.0.2+dfsg1-1ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/python-werkzeug/0.16.1+dfsg1-2ubuntu0.1
https://launchpad.net/ubuntu/+source/python-werkzeug/0.14.1+dfsg1-1ubuntu0.2