[Security] Bump urllib3 from 1.26.15 to 1.26.17

Bumps urllib3 from 1.26.15 to 1.26.17. This update includes a security fix.

Vulnerabilities fixed

Cookie HTTP header isn't stripped on cross-origin redirects urllib3 doesn't treat the Cookie HTTP header special or provide any helpers for managing cookies over HTTP, that is the responsibility of the user. However, it is possible for a user to specify a Cookie header and unknowingly leak information via HTTP redirects to a different origin if that user doesn't disable redirects explicitly.

Users must handle redirects themselves instead of relying on urllib3's automatic redirects to achieve safe processing of the Cookie header, thus we decided to strip the header by default in order to further protect users who aren't using the correct approach.

Affected usages

We believe the number of usages affected by this advisory is low. It requires all of the following to be true to be exploited:

• Using an affected version of urllib3 (patched in v1.26.17 and v2.0.6)
• Using the Cookie header on requests, which is mostly typical for impersonating a browser.
• Not disabling HTTP redirects
• Either not using HTTPS or for the origin server to redirect to a malicious origin.

Remediation

• Upgrading to at least urllib3 v1.26.17 or v2.0.6
• Disabling HTTP redirects using redirects=False when sending requests.
• Not using the Cookie header.

Patched versions: 1.26.17 Affected versions: < 1.26.17

Release notes

Sourced from urllib3's releases.

1.26.17

• Added the Cookie header to the list of headers to strip from requests when redirecting to a different host. As before, different headers can be set via Retry.remove_headers_on_redirect. (GHSA-v845-jxx5-vc9f)

1.26.16

• Fixed thread-safety issue where accessing a PoolManager with many distinct origins would cause connection pools to be closed while requests are in progress (#2954)

Changelog

Sourced from urllib3's changelog.

1.26.17 (2023-10-02)

• Added the Cookie header to the list of headers to strip from requests when redirecting to a different host. As before, different headers can be set via Retry.remove_headers_on_redirect. ([#3139](https://github.com/urllib3/urllib3/issues/3139) <https://github.com/urllib3/urllib3/pull/3139>_)

1.26.16 (2023-05-23)

• Fixed thread-safety issue where accessing a PoolManager with many distinct origins would cause connection pools to be closed while requests are in progress ([#2954](https://github.com/urllib3/urllib3/issues/2954) <https://github.com/urllib3/urllib3/pull/2954>_)

Commits

• c9016bf Release 1.26.17
• 0122035 Backport GHSA-v845-jxx5-vc9f (#3139)
• e63989f Fix installing brotli extra on Python 2.7
• 2e7a24d [1.26] Configure OS for RTD to fix building docs
• 57181d6 [1.26] Improve error message when calling urllib3.request() (#3058)
• 3c01480 [1.26] Run coverage even with failed jobs
• d94029b Release 1.26.16
• 18e9214 Use trusted publishing for PyPI
• d25cf83 [1.26] Fix invalid test_ssl_failure_midway_through_conn
• 25cca38 [1.26] Fix test_ssl_object_attributes
• Additional commits viewable in compare view