Ubuntu alert USN-4378-1 (flask)

From:
             
 
"Leonidas S. Barbosa" <leo.barbosa@canonical.com> 
To:
             
 
ubuntu-security-announce@lists.ubuntu.com 
Subject:
             
 
[USN-4378-1] Flask vulnerability 
Date:
             
 
Mon, 1 Jun 2020 13:05:07 -0300
Message-ID:
             
 
<20200601160507.GA1685396@d4rkl41n>
==========================================================================
Ubuntu Security Notice USN-4378-1
June 01, 2020

flask vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM

Summary:

Flask could be made to consume a large amount of memory if it
received a specially crafted input.

Software Description:
- flask: Micro web framework based on Werkzeug and Jinja2

Details:

It was discovered that Flask incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a denial of service.

Update instructions:

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

Ubuntu 18.04 LTS:
  python-flask                    0.12.2-3ubuntu0.1
  python3-flask                   0.12.2-3ubuntu0.1

Ubuntu 16.04 LTS:
  python-flask                    0.10.1-2ubuntu0.1
  python3-flask                   0.10.1-2ubuntu0.1

Ubuntu 14.04 ESM:
  python-flask                    0.10.1-2ubuntu0.1~esm1
  python3-flask                   0.10.1-2ubuntu0.1~esm1

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

References:
  https://usn.ubuntu.com/4378-1
  CVE-2018-1000656

Package Information:
  https://launchpad.net/ubuntu/+source/flask/0.12.2-3ubuntu0.1
  https://launchpad.net/ubuntu/+source/flask/0.10.1-2ubuntu0.1
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