[Security] Bump sanitize from 2.0.3 to 4.6.3

[dependabot-preview]

Bumps sanitize from 2.0.3 to 4.6.3. This update includes security fixes.

Vulnerabilities fixed

Sourced from The Ruby Advisory Database.

HTML injection/XSS in Sanitize When Sanitize gem is used in combination with libxml2 >= 2.9.2, a specially crafted HTML fragment can cause libxml2 to generate improperly escaped output, allowing non-whitelisted attributes to be used on whitelisted elements.

This can allow HTML and JavaScript injection, which could result in XSS if Sanitize's output is served to browsers.

Patched versions: ~> 2.1.1; >= 4.6.3 Unaffected versions: < 1.1.0

Sourced from The Ruby Advisory Database.

HTML injection/XSS in Sanitize When Sanitize <= 4.6.2 is used in combination with libxml2 >= 2.9.2, a specially crafted HTML fragment can cause libxml2 to generate improperly escaped output, allowing non-whitelisted attributes to be used on whitelisted elements.

This can allow HTML and JavaScript injection, which could result in XSS if Sanitize's output is served to browsers.

Patched versions: >= 4.6.3 Unaffected versions: < 1.1.0

Release notes

Sourced from sanitize's releases.

4.6.3 (2018-03-19)

• CVE-2018-3740: Fixed an HTML injection vulnerability that could allow XSS.

  When Sanitize = 2.9.2, a specially crafted HTML fragment can cause libxml2 to generate improperly escaped output, allowing non-whitelisted attributes to be used on whitelisted elements.

  Sanitize now performs additional escaping on affected attributes to prevent this.

  Many thanks to the Shopify Application Security Team for responsibly reporting this issue.

4.6.2 (2018-03-19)

• Reduced string allocations to optimize memory usage. [@janklimo - #175]175

4.6.1 (2018-03-15)

• Added support for frozen string literals in Ruby 2.4+. [@flavorjones - #174]174

4.6.0 (2018-01-29)

• Loosened the Nokogumbo dependency to allow installing semver-compatible versions greater than or equal to v1.4. [@rafbm - #171]171

4.5.0 (2017-06-04)

• Added SVG-related CSS properties to the relaxed config. See the diff for the full list of added properties. [@louim - #161]161

• Fixed: Sanitize now strips null bytes (\u0000) before passing input to Nokogumbo, since they can cause recent versions to crash with a failed assertion in the Gumbo parser.

4.4.0 (2016-09-29)

• Added srcset to the attribute whitelist for img elements in the relaxed config. [@ejtttje - #156](rgrove/sanitize#156)

4.3.0 (2016-09-20)

• Methods can now be used as transformers. [@Skipants - #155](rgrove/sanitize#155)

4.2.0 (2016-08-22)

• Added -webkit-font-smoothing to the relaxed CSS config. [@louim - #154](rgrove/sanitize#154)
• Fixed: Nokogumbo >=1.4.9 changed its behavior in a way that allowed invalid doctypes (like <!DOCTYPE nonsense>) when the :allow_doctype config setting was true. Invalid doctypes are now coerced to valid ones as they were prior to this Nokogumbo change.

4.1.0 (2016-06-17)

• Added a new CSS config setting, :import_url_validator. This is a Proc or other callable object that will be called with each @import URL, and should return true to allow the URL or false to remove it. [@nikz - #153](rgrove/sanitize#153)

4.0.1 (2015-12-09)

• Unpinned the Nokogumbo dependency. [@rubys - #141](rgrove/sanitize#141)

Changelog

Sourced from sanitize's changelog.

4.6.3 (2018-03-19)

• CVE-2018-3740: Fixed an HTML injection vulnerability that could allow XSS.

  When Sanitize = 2.9.2, a specially crafted HTML fragment can cause libxml2 to generate improperly escaped output, allowing non-allowlisted attributes to be used on allowlisted elements.

  Sanitize now performs additional escaping on affected attributes to prevent this.

  Many thanks to the Shopify Application Security Team for responsibly reporting this issue.

4.6.2 (2018-03-19)

• Reduced string allocations to optimize memory usage. [@janklimo - #175]175

4.6.1 (2018-03-15)

• Added support for frozen string literals in Ruby 2.4+. [@flavorjones - #174]174

4.6.0 (2018-01-29)

• Loosened the Nokogumbo dependency to allow installing semver-compatible versions greater than or equal to v1.4. [@rafbm - #171]171

4.5.0 (2017-06-04)

• Added SVG-related CSS properties to the relaxed config. See the diff for the full list of added properties. [@louim - #161]161

• Fixed: Sanitize now strips null bytes (\u0000) before passing input to Nokogumbo, since they can cause recent versions to crash with a failed assertion in the Gumbo parser.

4.4.0 (2016-09-29)

Commits

• 5f66eb1 chore: Release 4.6.3
• 01629a1 fix: Prevent code injection due to improper escaping in libxml2 >= 2.9.2
• 0eee92e chore: Release 4.6.2
• caa558a Optimize memory usage
• 184709b chore: Release 4.6.1
• 5ab3d0d Merge branch 'flavorjones-flavorjones-frozen-string-support'
• 823a3f6 support ruby 2.4+ frozen string literals
• 1cbdff3 chore: Release 4.6.0
• 3c12cb3 Loosen Nokogumbo version to allow 1.5.0
• 6d494b3 Remove yard and redcarpet from dev dependencies
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Note: This repo was added to Dependabot recently, so you'll receive a maximum of 5 PRs for your first few update runs. Once an update run creates fewer than 5 PRs we'll remove that limit.

You can always request more updates by clicking Bump now in your Dependabot dashboard.

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
• @dependabot use these labels will set the current labels as the default for future PRs for this repo and language
• @dependabot use these reviewers will set the current reviewers as the default for future PRs for this repo and language
• @dependabot use these assignees will set the current assignees as the default for future PRs for this repo and language
• @dependabot use this milestone will set the current milestone as the default for future PRs for this repo and language
• @dependabot badge me will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot dashboard:

• Update frequency (including time of day and day of week)
• Pull request limits (per update run and/or open at any time)
• Out-of-range updates (receive only lockfile updates, if desired)
• Security updates (receive only security updates, if desired)