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🚨 [security] Update rexml 3.3.4 → 3.3.6 (patch)

Depfu Bot requested to merge depfu/update/rexml-3.3.6 into master

🚨 Your current dependencies have known security vulnerabilities 🚨

This dependency update fixes known security vulnerabilities. Please see the details below and assess their impact carefully. We recommend to merge and deploy this as soon as possible!


Here is everything you need to know about this update. Please take a good look at what changed and the test results before merging this pull request.

What changed?

️ rexml (indirect, 3.3.4 → 3.3.6) · Repo · Changelog
Security Advisories 🚨

🚨 REXML denial of service vulnerability

Impact

The REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML that has many deep elements that have same local name attributes.

If you need to parse untrusted XMLs with tree parser API like REXML::Document.new, you may be impacted to this vulnerability. If you use other parser APIs such as stream parser API and SAX2 parser API, this vulnerability is not affected.

Patches

The REXML gem 3.3.6 or later include the patch to fix the vulnerability.

Workarounds

Don't parse untrusted XMLs with tree parser API.

Release Notes

3.3.6

Improvements

  • Removed duplicated entity expansions for performance.

    • GH-194
    • Patch by Viktor Ivarsson.
  • Improved namespace conflicted attribute check performance. It was
    too slow for deep elements.

    • Reported by l33thaxor.

Fixes

  • Fixed a bug that default entity expansions are counted for
    security check. Default entity expansions should not be counted
    because they don't have a security risk.

  • Fixed a parser bug that parameter entity references in internal
    subsets are expanded. It's not allowed in the XML specification.

  • Fixed a stream parser bug that user-defined entity references in
    text aren't expanded.

Thanks

  • Viktor Ivarsson

  • NAITOH Jun

  • l33thaxor

3.3.5

Fixes

  • Fixed a bug that REXML::Security.entity_expansion_text_limit
    check has wrong text size calculation in SAX and pull parsers.
    • GH-193
    • GH-195
    • Reported by Viktor Ivarsson.
    • Patch by NAITOH Jun.

Thanks

  • Viktor Ivarsson

  • NAITOH Jun

Does any of this look wrong? Please let us know.

Commits

See the full diff on Github. The new version differs by 18 commits:


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