[Security] Bump urllib3 from 1.26.2 to 1.26.5

[dependabot-preview]

Bumps urllib3 from 1.26.2 to 1.26.5. This update includes security fixes.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Catastrophic backtracking in URL authority parser when passed URL containing many @ characters

Impact

When provided with a URL containing many @ characters in the authority component the authority regular expression exhibits catastrophic backtracking causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

Patches

The issue has been fixed in urllib3 v1.26.5.

References

• CVE-2021-33503
• urllib3 v1.26.5

For more information

If you have any questions or comments about this advisory:

• Ask in our community Discord
• Email [email protected]

Affected versions: < 1.26.5

Sourced from The GitHub Security Advisory Database.

Using default SSLContext for HTTPS requests in an HTTPS proxy doesn't verify certificate hostname for proxy connection

Impact

Users who are using an HTTPS proxy to issue HTTPS requests and haven't configured their own SSLContext via proxy_config. Only the default SSLContext is impacted.

Patches

urllib3 >=1.26.4 has the issue resolved. urllib3<1.26 is not impacted due to not supporting HTTPS requests via HTTPS proxies.

Workarounds

Upgrading is recommended as this is a minor release and not likely to break current usage.

Configuring an SSLContext with check_hostname=True and passing via proxy_config instead of relying on the default SSLContext

For more information

If you have any questions or comments about this advisory:

• Email us at [email protected]

Affected versions: >= 1.26.0, <= 1.26.3

Sourced from The GitHub Security Advisory Database.

Using default SSLContext for HTTPS requests in an HTTPS proxy doesn't verify certificate hostname for proxy connection

Impact

Users who are using an HTTPS proxy to issue HTTPS requests and haven't configured their own SSLContext via proxy_config. Only the default SSLContext is impacted.

Patches

urllib3 >=1.26.4 has the issue resolved. urllib3<1.26 is not impacted due to not supporting HTTPS requests via HTTPS proxies.

Workarounds

Upgrading is recommended as this is a minor release and not likely to break current usage.

Configuring an SSLContext with check_hostname=True and passing via proxy_config instead of relying on the default SSLContext

For more information

If you have any questions or comments about this advisory:

• Email us at [email protected]

Affected versions: >= 1.26.0, < 1.26.3

Release notes

Sourced from urllib3's releases.

1.26.5

⚠️ IMPORTANT: urllib3 v2.0 will drop support for Python 2: Read more in the v2.0 Roadmap

• Fixed deprecation warnings emitted in Python 3.10.
• Updated vendored six library to 1.16.0.
• Improved performance of URL parser when splitting the authority component.

If you or your organization rely on urllib3 consider supporting us via GitHub Sponsors

1.26.4

⚠️ IMPORTANT: urllib3 v2.0 will drop support for Python 2: Read more in the v2.0 Roadmap

• Changed behavior of the default SSLContext when connecting to HTTPS proxy during HTTPS requests. The default SSLContext now sets check_hostname=True.

If you or your organization rely on urllib3 consider supporting us via GitHub Sponsors

1.26.3

⚠️ IMPORTANT: urllib3 v2.0 will drop support for Python 2: Read more in the v2.0 Roadmap

• Fixed bytes and string comparison issue with headers (Pull #2141)

• Changed ProxySchemeUnknown error message to be more actionable if the user supplies a proxy URL without a scheme (Pull #2107)

If you or your organization rely on urllib3 consider supporting us via GitHub Sponsors

Changelog

Sourced from urllib3's changelog.

1.26.5 (2021-05-26)

• Fixed deprecation warnings emitted in Python 3.10.
• Updated vendored six library to 1.16.0.
• Improved performance of URL parser when splitting the authority component.

1.26.4 (2021-03-15)

• Changed behavior of the default SSLContext when connecting to HTTPS proxy during HTTPS requests. The default SSLContext now sets check_hostname=True.

1.26.3 (2021-01-26)

• Fixed bytes and string comparison issue with headers (Pull #2141)
• Changed ProxySchemeUnknown error message to be more actionable if the user supplies a proxy URL without a scheme. (Pull #2107)

Commits

• d161647 Release 1.26.5
• 2d4a3fe Improve performance of sub-authority splitting in URL
• 2698537 Update vendored six to 1.16.0
• 07bed79 Fix deprecation warnings for Python 3.10 ssl module
• d725a9b Add Python 3.10 to GitHub Actions
• 339ad34 Use pytest==6.2.4 on Python 3.10+
• f271c9c Apply latest Black formatting
• 1884878 [1.26] Properly proxy EOF on the SSLTransport test suite
• a891304 Release 1.26.4
• 8d65ea1 Merge pull request from GHSA-5phf-pp7p-vc2r
• Additional commits viewable in compare view

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