Bump waitress from 1.3.1 to 1.4.1

[dependabot[bot]]

Bumps waitress from 1.3.1 to 1.4.1.

Changelog

*Sourced from [waitress's changelog](https://github.com/Pylons/waitress/blob/master/CHANGES.txt).* > 1.4.1 (2019-12-24) > ------------------ > > Security Fixes > ~~~~~~~~~~~~~~ > > - Waitress did not properly validate that the HTTP headers it received were > properly formed, thereby potentially allowing a front-end server to treat a > request different from Waitress. This could lead to HTTP request > smuggling/splitting. > > Please see the security advisory for more information: > https://github.com/Pylons/waitress/security/advisories/GHSA-m5ff-3wj3-8ph4 > > 1.4.0 (2019-12-20) > ------------------ > > Bugfixes > ~~~~~~~~ > > - Waitress used to slam the door shut on HTTP pipelined requests without > setting the ``Connection: close`` header as appropriate in the response. This > is of course not very friendly. Waitress now explicitly sets the header when > responding with an internally generated error such as 400 Bad Request or 500 > Internal Server Error to notify the remote client that it will be closing the > connection after the response is sent. > > - Waitress no longer allows any spaces to exist between the header field-name > and the colon. While waitress did not strip the space and thereby was not > vulnerable to any potential header field-name confusion, it should have sent > back a 400 Bad Request. See [Pylons/waitress#273](https://github-redirect.dependabot.com/Pylons/waitress/issues/273) > > Security Fixes > ~~~~~~~~~~~~~~ > > - Waitress implemented a "MAY" part of the RFC7230 > (https://tools.ietf.org/html/rfc7230#section-3.5) which states: > > Although the line terminator for the start-line and header fields is > the sequence CRLF, a recipient MAY recognize a single LF as a line > terminator and ignore any preceding CR. > > Unfortunately if a front-end server does not parse header fields with an LF > the same way as it does those with a CRLF it can lead to the front-end and > the back-end server parsing the same HTTP message in two different ways. This > can lead to a potential for HTTP request smuggling/splitting whereby Waitress > may see two requests while the front-end server only sees a single HTTP > message. > > For more information I can highly recommend the blog post by ZeddYu Lu > ... (truncated)

Commits

- [`cd83598`](https://github.com/Pylons/waitress/commit/cd8359864400592ba0db5d74e650a8fac4763d0d) Prep v1.4.1 - [`11d9e13`](https://github.com/Pylons/waitress/commit/11d9e138125ad46e951027184b13242a3c1de017) Merge pull request from GHSA-m5ff-3wj3-8ph4 - [`a046a76`](https://github.com/Pylons/waitress/commit/a046a7667c8a7afa0237c668e6ff33f7c10894f7) Add links to advisories for previous security issues - [`3c58e39`](https://github.com/Pylons/waitress/commit/3c58e397cc17e51e1127e971621fb617b04bd33d) Bump version number - [`de3324d`](https://github.com/Pylons/waitress/commit/de3324dd2126ce7ae1e55411f2684c333d96d62b) Add documentation for security issue - [`3bcd690`](https://github.com/Pylons/waitress/commit/3bcd690f3a068e63faae898f255df047e1ae884c) Define VCHAR/OBS_TEXT once - [`2e46f24`](https://github.com/Pylons/waitress/commit/2e46f2426e2845e6a088e21451d3d0031b804cea) Validate HTTP header-field more completely - [`2a11d68`](https://github.com/Pylons/waitress/commit/2a11d6812f703e01150c2aedbca7ec2a6590f254) Add file with RFC7230 definitions/ABNF -> regex - [`f11093a`](https://github.com/Pylons/waitress/commit/f11093a6b3240fc26830b6111e826128af7771c3) Merge pull request from GHSA-g2xc-35jw-c63p - [`e586be8`](https://github.com/Pylons/waitress/commit/e586be8f43dbb266b9ef28bb285408b3ac3dacd4) Version 1.4.0 - Additional commits viewable in [compare view](https://github.com/Pylons/waitress/compare/v1.3.1...v1.4.1)

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[dependabot[bot]]

Superseded by #95.