python-urllib3 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

urllib3 could be used to perform a CRLF injection if it received a
specially crafted request.

Software Description

* python-urllib3 - HTTP library with thread-safe connection
pooling

Details

It was discovered that urllib3 incorrectly handled certain
character sequences. A remote attacker could possibly use this
issue to perform CRLF injection.

Update instructions

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

Ubuntu 20.04 LTS
python3-urllib3 - 1.25.8-2ubuntu0.1

Ubuntu 18.04 LTS
python-urllib3 - 1.22-1ubuntu0.18.04.2
python3-urllib3 - 1.22-1ubuntu0.18.04.2

Ubuntu 16.04 LTS
python-urllib3 - 1.13.1-2ubuntu0.16.04.4
python3-urllib3 - 1.13.1-2ubuntu0.16.04.4

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-2020-26137

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