[Security] Bump rack from 2.0.7 to 2.1.2

[dependabot-preview]

Bumps rack from 2.0.7 to 2.1.2. This update includes security fixes.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Low severity vulnerability that affects rack There's a possible information leak / session hijack vulnerability in Rack. Attackers may be able to find and hijack sessions by using timing attacks targeting the session id. Session ids are usually stored and indexed in a database that uses some kind of scheme for speeding up lookups of that session id. By carefully measuring the amount of time it takes to look up a session, an attacker may be able to find a valid session id and hijack the session.

The session id itself may be generated randomly, but the way the session is indexed by the backing store does not use a secure comparison.

Impact

The session id stored in a cookie is the same id that is used when querying the backing session storage engine. Most storage mechanisms (for example a database) use some sort of indexing in order to speed up the lookup of that id. By carefully timing requests and session lookup failures, an attacker may be able to perform a timing attack to determine an existing session id and hijack that session.

Releases

The 1.6.12 and 2.0.8 releases are available at the normal locations.

Workarounds

There are no known workarounds.

Patches

To aid users who aren't able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a

... (truncated)

Affected versions: >= 2.0.0, < 2.0.8

Sourced from The Ruby Advisory Database.

Possible information leak / session hijack vulnerability There's a possible information leak / session hijack vulnerability in Rack.

Attackers may be able to find and hijack sessions by using timing attacks targeting the session id. Session ids are usually stored and indexed in a database that uses some kind of scheme for speeding up lookups of that session id. By carefully measuring the amount of time it takes to look up a session, an attacker may be able to find a valid session id and hijack the session.

The session id itself may be generated randomly, but the way the session is indexed by the backing store does not use a secure comparison.

Impact:

The session id stored in a cookie is the same id that is used when querying the backing session storage engine. Most storage mechanisms (for example a database) use some sort of indexing in order to speed up the lookup of that id. By carefully timing requests and session lookup failures, an attacker may be able to perform a timing attack to determine an existing session id and hijack that session.

Patched versions: ~> 1.6.12; >= 2.0.8 Unaffected versions: none

Changelog

Sourced from rack's changelog.

Changelog

All notable changes to this project will be documented in this file. For info on how to format all future additions to this file please reference Keep A Changelog.

Unreleased

SPEC Changes

• rack.session request environment entry must respond to to_hash and return unfrozen Hash. (@jeremyevans)
• Request environment cannot be frozen. (@jeremyevans)
• CGI values in the request environment with non-ASCII characters must use ASCII-8BIT encoding. (@jeremyevans)

Added

• rackup supports multiple -r options and will require all arguments. (@jeremyevans)
• Server supports an array of paths to require for the :require option. (@khotta)
• Files supports multipart range requests. (@fatkodima)
• Multipart::UploadedFile supports an IO-like object instead of using the filesystem, using :filename and :io options. (@jeremyevans)
• Multipart::UploadedFile supports keyword arguments :path, :content_type, and :binary in addition to positional arguments. (@jeremyevans)
• Static supports a :cascade option for calling the app if there is no matching file. (@jeremyevans)
• Session::Abstract::SessionHash#dig. (@jeremyevans)
• Response.[] and MockResponse.[] for creating instances using status, headers, and body. (@ioquatix)

Changed

• Etag will continue sending ETag even if the response should not be cached. (@henm)
• Request#host_with_port no longer includes a colon for a missing or empty port. (@AlexWayfer)
• All handlers uses keywords arguments instead of an options hash argument. (@ioquatix)
• Files handling of range requests no longer return a body that supports to_path, to ensure range requests are handled correctly. (@jeremyevans)
• Multipart::Generator only includes Content-Length for files with paths, and Content-Disposition filename if the UploadedFile instance has one. (@jeremyevans)
• Request#ssl? is true for the wss scheme (secure websockets). (@jeremyevans)

Removed

• Session::Abstract::SessionHash#transform_keys, no longer needed. (pavel)
• URLMap::INFINITY and URLMap::NEGATIVE_INFINITY, in favor of Float::INFINITY. (@ch1c0t)
• Deprecation of Rack::File. It will be deprecated again in rack 2.2 or 3.0. (@rafaelfranca)
• Support for Ruby 2.2 as it is well past EOL. (@ioquatix)

Fixed

• CommonLogger includes SCRIPT_NAME when logging. (@Erol)
• Utils.parse_nested_query correctly handles empty queries, using an empty instance of the params class instead of a hash. (@jeremyevans)
• Directory correctly escapes paths in links. (@yous)
• Request#delete_cookie and related Utils methods handle :domain and :path options in same call. (@jeremyevans)
• Request#delete_cookie and related Utils methods do an exact match on :domain and :path options. (@jeremyevans)
• Static no longer adds headers when a gzipped file request has a 304 response. (@chooh)
• ContentLength sets Content-Length response header even for bodies not responding to to_ary. (@jeremyevans)
• Multipart::Parser uses a slightly modified parser to avoid denial of service when parsing MIME boundaries. (@aiomaster)
• Thin handler supports options passed directly to Thin::Controllers::Controller. (@jeremyevans)

... (truncated)

Commits

• 16a51d8 Bump for 2.1.2 release
• 0a2c927 Update changelog in preparation for 2.1.2
• b50bc8b Fix multipart parser for special files #1308
• f9ef9a0 Fix use with kwargs
• 75d178c Skip deflating in Rack::Deflater if Content-Length is 0
• e758a11 #transform_keys no longer necessary, reverts #1401
• c423510 Fix: Add to_hash to wrap Hash and Session classes
• 8f57e83 Handle case where session id key is requested but it is missing
• 799a520 Updating changelog for 2-1-stable
• 4fabf4d Bump version.
• Additional commits viewable in compare view

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Superseded by #123.