1. Ubuntu Security Notices
  2. USN-4378-1

USN-4378-1: Flask vulnerability

Publication date

1 June 2020

Overview

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

Releases

Packages

  • 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.

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

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.04 bionic python-flask –  0.12.2-3ubuntu0.1
python3-flask –  0.12.2-3ubuntu0.1
16.04 xenial python-flask –  0.10.1-2ubuntu0.1
python3-flask –  0.10.1-2ubuntu0.1
14.04 trusty python-flask –  0.10.1-2ubuntu0.1~esm1  
python3-flask –  0.10.1-2ubuntu0.1~esm1  

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References

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