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@renovate renovate bot commented Jun 18, 2024

Mend Renovate

This PR contains the following updates:

Package Change Age Adoption Passing Confidence
urllib3 (changelog) 1.26.18 -> 1.26.19 age adoption passing confidence

GitHub Vulnerability Alerts

CVE-2024-37891

When using urllib3's proxy support with ProxyManager, the Proxy-Authorization header is only sent to the configured proxy, as expected.

However, when sending HTTP requests without using urllib3's proxy support, it's possible to accidentally configure the Proxy-Authorization header even though it won't have any effect as the request is not using a forwarding proxy or a tunneling proxy. In those cases, urllib3 doesn't treat the Proxy-Authorization HTTP header as one carrying authentication material and thus doesn't strip the header on cross-origin redirects.

Because this is a highly unlikely scenario, we believe the severity of this vulnerability is low for almost all users. Out of an abundance of caution urllib3 will automatically strip the Proxy-Authorization header during cross-origin redirects to avoid the small chance that users are doing this on accident.

Users should use urllib3's proxy support or disable automatic redirects to achieve safe processing of the Proxy-Authorization header, but we still 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:

  • Setting the Proxy-Authorization header without using urllib3's built-in proxy support.
  • Not disabling HTTP redirects.
  • Either not using an HTTPS origin server or for the proxy or target origin to redirect to a malicious origin.

Remediation

  • Using the Proxy-Authorization header with urllib3's ProxyManager.
  • Disabling HTTP redirects using redirects=False when sending requests.
  • Not using the Proxy-Authorization header.

Release Notes

urllib3/urllib3 (urllib3)

v1.26.19

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This PR has been generated by Mend Renovate. View repository job log here.

@renovate renovate bot requested a review from a team as a code owner June 18, 2024 03:11
@artemrys artemrys merged commit 3ee0404 into main Jun 18, 2024
@artemrys artemrys deleted the renovate/pypi-urllib3-vulnerability branch June 18, 2024 09:30
@github-actions github-actions bot locked and limited conversation to collaborators Jun 18, 2024
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🎉 This issue has been resolved in version 5.3.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

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