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Bump waitress from 1.4.2 to 1.4.3 in /src/app

Talukder, Khaled requested to merge dependabot/pip/src/app/waitress-1.4.3 into master

Created by: dependabot[bot]

Bumps waitress from 1.4.2 to 1.4.3.

Changelog

Sourced from waitress's changelog.

1.4.3 (2020-02-02)

Security Fixes


- In Waitress version 1.4.2 a new regular expression was added to validate the
  headers that Waitress receives to make sure that it matches RFC7230.
  Unfortunately the regular expression was written in a way that with invalid
  input it leads to catastrophic backtracking which allows for a Denial of
  Service and CPU usage going to a 100%.

  This was reported by Fil Zembowicz to the Pylons Project. Please see
  https://github.com/Pylons/waitress/security/advisories/GHSA-73m2-3pwg-5fgc
  for more information.
Commits
  • cbc89bf Prep v1.4.3
  • 6e46f9e Merge pull request from GHSA-73m2-3pwg-5fgc
  • 51b9bd4 Remove accidental backslash
  • f87abb7 Add bad header that caused catastrophic backtracking
  • 2fe8e54 Add header parsing tests with short headers
  • ac0ca05 Remove catastrophic backtracking in regex
  • See full diff in compare view

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