==========================================================================
Ubuntu Security Notice USN-4570-1
October 05, 2020
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
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4570-1
CVE-2020-26137
Package Information:
https://launchpad.net/ubuntu/+source/python-urllib3/1.25.8-2ubuntu0.1
https://launchpad.net/ubuntu/+source/python-urllib3/1.22-1ubuntu0.18.04.2
https://launchpad.net/ubuntu/+source/python-urllib3/1.13.1-2ubuntu0.16.04.4
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