USN-4378-1: Flask vulnerability

USN-4378-1: Flask vulnerability

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

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• CVE-2018-1000656

Source: USN-4378-1: Flask vulnerability