[Security] Bump urllib3 from 1.25.2 to 1.26.5

[dependabot-preview]

Bumps urllib3 from 1.25.2 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 sethmichaellarson@gmail.com

Affected versions: < 1.26.5

Sourced from The GitHub Security Advisory Database.

CRLF injection urllib3 before 1.25.9 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of putrequest(). NOTE: this is similar to CVE-2020-26116.

Affected versions: < 1.25.9

Sourced from The GitHub Security Advisory Database.

Uncontrolled Resource Consumption in urllib3 The _encode_invalid_chars function in util/url.py in the urllib3 library 1.25.2 through 1.25.7 for Python allows a denial of service (CPU consumption) because of an inefficient algorithm. The percent_encodings array contains all matches of percent encodings. It is not deduplicated. For a URL of length N, the size of percent_encodings may be up to O(N). The next step (normalize existing percent-encoded bytes) also takes up to O(N) for each step, so the total time is O(N^2). If percent_encodings were deduplicated, the time to compute _encode_invalid_chars would be O(kN), where k is at most 484 ((10+6*2)^2).

Affected versions: >= 1.25.2, <= 1.25.7

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

1.26.2

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

• Fixed an issue where wrap_socket and CERT_REQUIRED wouldn't be imported properly on Python 2.7.8 and earlier (Pull #2052)

1.26.1

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

• Fixed an issue where two User-Agent headers would be sent if a User-Agent header key is passed as bytes (Pull #2047)

1.26.0

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

• Added support for HTTPS proxies contacting HTTPS servers (Pull #1923, Pull #1806)

• Deprecated negotiating TLSv1 and TLSv1.1 by default. Users that still wish to use TLS earlier than 1.2 without a deprecation warning should opt-in explicitly by setting ssl_version=ssl.PROTOCOL_TLSv1_1 (Pull #2002) Starting in urllib3 v2.0: Connections that receive a DeprecationWarning will fail

• Deprecated Retry options Retry.DEFAULT_METHOD_WHITELIST, Retry.DEFAULT_REDIRECT_HEADERS_BLACKLIST and Retry(method_whitelist=...) in favor of Retry.DEFAULT_ALLOWED_METHODS, Retry.DEFAULT_REMOVE_HEADERS_ON_REDIRECT, and Retry(allowed_methods=...) (Pull #2000) Starting in urllib3 v2.0: Deprecated options will be removed

... (truncated)

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)

1.26.2 (2020-11-12)

• Fixed an issue where wrap_socket and CERT_REQUIRED wouldn't be imported properly on Python 2.7.8 and earlier (Pull #2052)

1.26.1 (2020-11-11)

• Fixed an issue where two User-Agent headers would be sent if a User-Agent header key is passed as bytes (Pull #2047)

1.26.0 (2020-11-10)

• NOTE: urllib3 v2.0 will drop support for Python 2. Read more in the v2.0 Roadmap.
• Added support for HTTPS proxies contacting HTTPS servers (Pull #1923, Pull #1806)
• Deprecated negotiating TLSv1 and TLSv1.1 by default. Users that still wish to use TLS earlier than 1.2 without a deprecation warning should opt-in explicitly by setting ssl_version=ssl.PROTOCOL_TLSv1_1 (Pull #2002) Starting in urllib3 v2.0: Connections that receive a DeprecationWarning will fail
• Deprecated Retry options Retry.DEFAULT_METHOD_WHITELIST, Retry.DEFAULT_REDIRECT_HEADERS_BLACKLIST and Retry(method_whitelist=...) in favor of Retry.DEFAULT_ALLOWED_METHODS, Retry.DEFAULT_REMOVE_HEADERS_ON_REDIRECT, and Retry(allowed_methods=...) (Pull #2000) Starting in urllib3 v2.0: Deprecated options will be removed
• Added default User-Agent header to every request (Pull #1750)
• Added urllib3.util.SKIP_HEADER for skipping User-Agent, Accept-Encoding, and Host headers from being automatically emitted with requests (Pull #2018)
• Collapse transfer-encoding: chunked request data and framing into the same socket.send() call (Pull #1906)
• Send http/1.1 ALPN identifier with every TLS handshake by default (Pull #1894)
• Properly terminate SecureTransport connections when CA verification fails (Pull #1977)
• Don't emit an SNIMissingWarning when passing server_hostname=None to SecureTransport (Pull #1903)
• Disabled requesting TLSv1.2 session tickets as they weren't being used by urllib3 (Pull #1970)
• Suppress BrokenPipeError when writing request body after the server has closed the socket (Pull #1524)
• Wrap ssl.SSLError that can be raised from reading a socket (e.g. "bad MAC") into an urllib3.exceptions.SSLError (Pull #1939)

1.25.11 (2020-10-19)

• Fix retry backoff time parsed from Retry-After header when given in the HTTP date format. The HTTP date was parsed as the local timezone rather than accounting for the timezone in the HTTP date (typically UTC) (Pull #1932, Pull #1935, Pull #1938, Pull #1949)
• Fix issue where an error would be raised when the SSLKEYLOGFILE environment variable was set to the empty string. Now SSLContext.keylog_file is not set in this situation (Pull #2016)

... (truncated)

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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