brotli vulnerability

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

* Ubuntu 20.04 LTS
* Ubuntu 18.04 LTS
* Ubuntu 16.04 LTS

Summary

Brotli could be made to crash if it received a specially crafted
input.

Software Description

* brotli - lossless compression algorithm and format (command
line utility)

Details

It was discovered that Brotli incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a crash.

Update instructions

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

Ubuntu 20.04 LTS
brotli - 1.0.7-6ubuntu0.1
libbrotli1 - 1.0.7-6ubuntu0.1
python3-brotli - 1.0.7-6ubuntu0.1

Ubuntu 18.04 LTS
brotli - 1.0.3-1ubuntu1.3
libbrotli1 - 1.0.3-1ubuntu1.3
python-brotli - 1.0.3-1ubuntu1.3
python3-brotli - 1.0.3-1ubuntu1.3

Ubuntu 16.04 LTS
brotli - 1.0.3-1ubuntu1~16.04.2
libbrotli1 - 1.0.3-1ubuntu1~16.04.2
python-brotli - 1.0.3-1ubuntu1~16.04.2
python3-brotli - 1.0.3-1ubuntu1~16.04.2

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-2020-8927

--- Mystic BBS v1.12 A46 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)