[Security] Bump puma from 4.1.0 to 4.3.1

[dependabot-preview]

Bumps puma from 4.1.0 to 4.3.1. This update includes a security fix.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects puma

Keepalive thread overload/DoS

Impact

A poorly-behaved client could use keepalive requests to monopolize Puma's reactor and create a denial of service attack.

If more keepalive connections to Puma are opened than there are threads available, additional connections will wait permanently if the attacker sends requests frequently enough.

Patches

This vulnerability is patched in Puma 4.3.1 and 3.12.2.

Workarounds

Reverse proxies in front of Puma could be configured to always allow less than X keepalive connections to a Puma cluster or process, where X is the number of threads configured in Puma's thread pool.

For more information

If you have any questions or comments about this advisory:

... (truncated)

Affected versions: >= 4.0.0, < 4.3.1

Release notes

Sourced from puma's releases.

v4.3.0 - Mysterious Traveller

Mysterious Traveller

• Features

  • Strip whitespace at end of HTTP headers (#2010)
  • Optimize HTTP parser for JRuby (#2012)
  • Add SSL support for the control app and cli (#2046, #2052)

• Bugfixes

  • Fix Errno::EINVAL when SSL is enabled and browser rejects cert (#1564)
  • Fix pumactl defaulting puma to development if an environment was not specified (#2035)
  • Fix closing file stream when reading pid from pidfile (#2048)
  • Fix a typo in configuration option --extra_runtime_dependencies (#2050)

4.2.1

• 3 bugfixes
  • Fix socket activation of systemd (pre-existing) unix binder files (#1842, #1988)
  • Deal with multiple calls to bind correctly (#1986, #1994, #2006)
  • Accepts symbols for verify_mode (#1222)

4.2.0 - Distant Airhorns

• 6 features
  • Pumactl has a new -e environment option and reads config/puma/.rb config files (#1885)
  • Semicolons are now allowed in URL paths (MRI only), useful for Angular or Redmine (#1934)
  • Allow extra dependencies to be defined when using prune_bundler (#1105)
  • Puma now reports the correct port when binding to port 0, also reports other listeners when binding to localhost (#1786)
  • Sending SIGINFO to any Puma worker now prints currently active threads and their backtraces (#1320)
  • Puma threads all now have their name set on Ruby 2.3+ (#1968)
• 4 bugfixes
  • Fix some misbehavior with phased restart and externally SIGTERMed workers (#1908, #1952)
  • Fix socket closing on error (#1941)
  • Removed unnecessary SIGINT trap for JRuby that caused some race conditions (#1961)
  • Fix socket files being left around after process stopped (#1970)
• Absolutely thousands of lines of test improvements and fixes thanks to @​MSP-Greg

4.1.1

3 bugfixes

• Revert our attempt to not dup STDOUT/STDERR (#1946)
• Fix socket close on error (#1941)
• Fix workers not shutting down correctly (#1908)

Changelog

Sourced from puma's changelog.

4.3.1 and 3.12.2 / 2019-12-05

• Security
  • Fix: a poorly-behaved client could use keepalive requests to monopolize Puma's reactor and create a denial of service attack. CVE-2019-16770.

4.3.0 / 2019-11-07

• Features

  • Strip whitespace at end of HTTP headers (#2010)
  • Optimize HTTP parser for JRuby (#2012)
  • Add SSL support for the control app and cli (#2046, #2052)

• Bugfixes

  • Fix Errno::EINVAL when SSL is enabled and browser rejects cert (#1564)
  • Fix pumactl defaulting puma to development if an environment was not specified (#2035)
  • Fix closing file stream when reading pid from pidfile (#2048)
  • Fix a typo in configuration option --extra_runtime_dependencies (#2050)

4.2.1 / 2019-10-07

• 3 bugfixes
  • Fix socket activation of systemd (pre-existing) unix binder files (#1842, #1988)
  • Deal with multiple calls to bind correctly (#1986, #1994, #2006)
  • Accepts symbols for verify_mode (#1222)

4.2.0 / 2019-09-23

• 6 features
  • Pumactl has a new -e environment option and reads config/puma/<environment>.rb config files (#1885)
  • Semicolons are now allowed in URL paths (MRI only), useful for Angular or Redmine (#1934)
  • Allow extra dependencies to be defined when using prune_bundler (#1105)
  • Puma now reports the correct port when binding to port 0, also reports other listeners when binding to localhost (#1786)
  • Sending SIGINFO to any Puma worker now prints currently active threads and their backtraces (#1320)
  • Puma threads all now have their name set on Ruby 2.3+ (#1968)
• 4 bugfixes
  • Fix some misbehavior with phased restart and externally SIGTERMed workers (#1908, #1952)
  • Fix socket closing on error (#1941)
  • Removed unnecessary SIGINT trap for JRuby that caused some race conditions (#1961)
  • Fix socket files being left around after process stopped (#1970)
• Absolutely thousands of lines of test improvements and fixes thanks to @​MSP-Greg

4.1.1 / 2019-09-05

• 3 bugfixes
  • Revert our attempt to not dup STDOUT/STDERR (#1946)
  • Fix socket close on error (#1941)
  • Fix workers not shutting down correctly (#1908)

Commits

• 2986bc4 4.3.1
• 285c3f9 4.3.1 and 4.2.1 release notes
• 98a1f03 Merge pull request from GHSA-7xx3-m584-x994
• d20242b 4.3.0
• 4852902 Merge pull request #2068 from ahorek/travis_fixes
• 2d89d7c travis fixes
• 3203159 dont set frozen-string-literal for ruby 2.2 [changelog skip] (#2066)
• 8e751a8 Add TruffleRuby to (Travis) CI
• 536c3ed Rubocop failures
• 554c02c Also make request_body_wait_chunked less strict
• Additional commits viewable in compare view

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[coveralls]

Coverage remained the same at 96.306% when pulling 5b89486 on dependabot/bundler/puma-4.3.1 into 8d67d43 on master.

[dependabot-preview]

Superseded by #776.