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Ubuntu Security Notice USN-4570-1

Ubuntu Security Notice USN-4570-1
Posted Oct 5, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4570-1 - It was discovered that urllib3 incorrectly handled certain character sequences. A remote attacker could possibly use this issue to perform CRLF injection.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2020-26137
MD5 | 94d0262eabdbd307023dc56562e3ca2e

Ubuntu Security Notice USN-4570-1

Change Mirror Download
==========================================================================
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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