[Security] Bump puma from 4.3.1 to 4.3.3

[dependabot-preview]

Bumps puma from 4.3.1 to 4.3.3. This update includes security fixes.

Vulnerabilities fixed

Sourced from The Ruby Advisory Database.

HTTP Response Splitting vulnerability in puma If an application using Puma allows untrusted input in a response header, an attacker can use newline characters (i.e. CR, LF) to end the header and inject malicious content, such as additional headers or an entirely new response body. This vulnerability is known as HTTP Response Splitting.

While not an attack in itself, response splitting is a vector for several other attacks, such as cross-site scripting (XSS).

Patched versions: ~> 3.12.4; >= 4.3.3 Unaffected versions: none

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects puma In Puma (RubyGem) before 4.3.2 and 3.12.2, if an application using Puma allows untrusted input in a response header, an attacker can use newline characters (i.e. CR, LF or/r, /n) to end the header and inject malicious content, such as additional headers or an entirely new response body. This vulnerability is known as HTTP Response Splitting.

While not an attack in itself, response splitting is a vector for several other attacks, such as cross-site scripting (XSS).

This is related to CVE-2019-16254, which fixed this vulnerability for the WEBrick Ruby web server.

This has been fixed in versions 4.3.2 and 3.12.3 by checking all headers for line endings and rejecting headers with those characters.

Affected versions: >= 4.0.0, < 4.3.2

Changelog

Sourced from puma's changelog.

4.3.3 and 3.12.4 / 2020-02-28

• Bugfixes
  • Fix: Fixes a problem where we weren't splitting headers correctly on newlines (#2132)
• Security
  • Fix: Prevent HTTP Response splitting via CR in early hints.

4.3.2 and 3.12.3 / 2020-02-27

• Security
  • Fix: Prevent HTTP Response splitting via CR/LF in header values. CVE-2020-5247.

Commits

• 7a65937 4.3.3
• 45b4cc9 HTTP Injection - fix bug + 1 more vector (#2136)
• 040a5bf 4.3.2
• ae98b54 4.3.2 and 3.12.3 release notes
• 694feaf Merge pull request from GHSA-84j7-475p-hp8v
• See full diff in compare view

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[codecov-io]

Codecov Report

Merging #910 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #910   +/-   ##
======================================
  Coverage    91.2%   91.2%           
======================================
  Files         111     111           
  Lines        2683    2683           
======================================
  Hits         2447    2447           
  Misses        236     236

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