🚨 [security] Update rack: 2.1.1 → 2.1.3 (patch)

🚨 Your version of rack has known security vulnerabilities 🚨

Advisory: CVE-2020-8161 Disclosed: May 12, 2020 URL: https://groups.google.com/forum/#!topic/ruby-security-ann/T4ZIsfRf2eA

Directory traversal in Rack::Directory app bundled with Rack

There was a possible directory traversal vulnerability in the Rack::Directory app
that is bundled with Rack.

Versions Affected: rack < 2.2.0
Not affected: Applications that do not use Rack::Directory.
Fixed Versions: 2.1.3, >= 2.2.0

Impact

If certain directories exist in a director that is managed by
Rack::Directory, an attacker could, using this vulnerability, read the
contents of files on the server that were outside of the root specified in the
Rack::Directory initializer.

Workarounds

Until such time as the patch is applied or their Rack version is upgraded,
we recommend that developers do not use Rack::Directory in their
applications.

🚨 We recommend to merge and deploy this update 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?

↗️ rack (indirect, 2.1.1 → 2.1.3) · Repo · Changelog

Release Notes

2.1.2 (from changelog)

Fix multipart parser for some files to prevent denial of service (@aiomaster)

Fix Rack::Builder#use with keyword arguments (@kamipo)

Skip deflating in Rack::Deflater if Content-Length is 0 (@jeremyevans)

Remove SessionHash#transform_keys, no longer needed (@pavel)

Add to_hash to wrap Hash and Session classes (@oleh-demyanyuk)

Handle case where session id key is requested but missing (@jeremyevans)

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

Commits

See the full diff on Github. The new version differs by 11 commits:

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mattzollinhofer / teachy