==========================================================================
Ubuntu Security Notice USN-6473-1
November 07, 2023

python-urllib3 vulnerabilities
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in urllib3.

Software Description:
- python-urllib3: HTTP library with thread-safe connection pooling

Details:

It was discovered that urllib3 didn't strip HTTP Authorization header
on cross-origin redirects. A remote attacker could possibly use this
issue to obtain sensitive information. This issue only affected
Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-25091)

It was discovered that urllib3 didn't strip HTTP Cookie header on
cross-origin redirects. A remote attacker could possibly use this
issue to obtain sensitive information. (CVE-2023-43804)

It was discovered that urllib3 didn't strip HTTP body on status code
303 redirects under certain circumstances. A remote attacker could
possibly use this issue to obtain sensitive information. (CVE-2023-45803)

Update instructions:

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

Ubuntu 23.10:
   python3-urllib3                 1.26.16-1ubuntu0.1

Ubuntu 23.04:
   python3-urllib3                 1.26.12-1ubuntu0.1

Ubuntu 22.04 LTS:
   python3-urllib3                 1.26.5-1~exp1ubuntu0.1

Ubuntu 20.04 LTS:
   python3-urllib3                 1.25.8-2ubuntu0.3

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   python-urllib3                  1.22-1ubuntu0.18.04.2+esm1
   python3-urllib3                 1.22-1ubuntu0.18.04.2+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   python-urllib3                  1.13.1-2ubuntu0.16.04.4+esm1
   python3-urllib3                 1.13.1-2ubuntu0.16.04.4+esm1

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

References:
   https://ubuntu.com/security/notices/USN-6473-1
   CVE-2018-25091, CVE-2023-43804, CVE-2023-45803

Package Information:
https://launchpad.net/ubuntu/+source/python-urllib3/1.26.16-1ubuntu0.1
https://launchpad.net/ubuntu/+source/python-urllib3/1.26.12-1ubuntu0.1
https://launchpad.net/ubuntu/+source/python-urllib3/1.26.5-1~exp1ubuntu0.1
https://launchpad.net/ubuntu/+source/python-urllib3/1.25.8-2ubuntu0.3