🚨 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.
There is a denial of service vulnerability in the header parsing component of Rack. This vulnerability has been assigned the CVE identifier CVE-2023-27539.
Carefully crafted input can cause header parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. Any applications that parse headers using Rack (virtually all Rails applications) are impacted.
Workarounds
Setting Regexp.timeout in Ruby 3.2 is a possible workaround.
There is a possible DoS vulnerability in the Multipart MIME parsing code in Rack. This vulnerability has been assigned the CVE identifier CVE-2023-27530.
Versions Affected: All. Not affected: None Fixed Versions: 3.0.4.2, 2.2.6.3, 2.1.4.3, 2.0.9.3
Impact
The Multipart MIME parsing code in Rack limits the number of file parts, but does not limit the total number of parts that can be uploaded. Carefully crafted requests can abuse this and cause multipart parsing to take longer than expected.
All users running an affected release should either upgrade or use one of the workarounds immediately.
Workarounds
A proxy can be configured to limit the POST body size which will mitigate this issue.
There is a possible DoS vulnerability in the Multipart MIME parsing code in Rack. This vulnerability has been assigned the CVE identifier CVE-2023-27530.
Versions Affected: All. Not affected: None Fixed Versions: 3.0.4.2, 2.2.6.3, 2.1.4.3, 2.0.9.3
Impact
The Multipart MIME parsing code in Rack limits the number of file parts, but does not limit the total number of parts that can be uploaded. Carefully crafted requests can abuse this and cause multipart parsing to take longer than expected.
All users running an affected release should either upgrade or use one of the workarounds immediately.
Workarounds
A proxy can be configured to limit the POST body size which will mitigate this issue.
There is a possible DoS vulnerability in the Multipart MIME parsing code in Rack. This vulnerability has been assigned the CVE identifier CVE-2023-27530.
Versions Affected: All. Not affected: None Fixed Versions: 3.0.4.2, 2.2.6.3, 2.1.4.3, 2.0.9.3
Impact
The Multipart MIME parsing code in Rack limits the number of file parts, but does not limit the total number of parts that can be uploaded. Carefully crafted requests can abuse this and cause multipart parsing to take longer than expected.
All users running an affected release should either upgrade or use one of the workarounds immediately.
Workarounds
A proxy can be configured to limit the POST body size which will mitigate this issue.
There is a possible denial of service vulnerability in the Range header
parsing component of Rack. This vulnerability has been assigned the CVE
identifier CVE-2022-44570.
Carefully crafted input can cause the Range header parsing component in Rack
to take an unexpected amount of time, possibly resulting in a denial of
service attack vector. Any applications that deal with Range requests (such
as streaming applications, or applications that serve files) may be impacted.
There is a denial of service vulnerability in the Content-Disposition parsing
component of Rack. This vulnerability has been assigned the CVE identifier CVE-2022-44571.
Carefully crafted input can cause Content-Disposition header parsing in Rack
to take an unexpected amount of time, possibly resulting in a denial of
service attack vector. This header is used typically used in multipart
parsing. Any applications that parse multipart posts using Rack (virtually
all Rails applications) are impacted.
There is a denial of service vulnerability in the multipart parsing component
of Rack. This vulnerability has been assigned the CVE identifier CVE-2022-44572.
Carefully crafted input can cause RFC2183 multipart boundary parsing in Rack
to take an unexpected amount of time, possibly resulting in a denial of
service attack vector. Any applications that parse multipart posts using
Rack (virtually all Rails applications) are impacted.
There is a possible denial of service vulnerability in the Range header
parsing component of Rack. This vulnerability has been assigned the CVE
identifier CVE-2022-44570.
Carefully crafted input can cause the Range header parsing component in Rack
to take an unexpected amount of time, possibly resulting in a denial of
service attack vector. Any applications that deal with Range requests (such
as streaming applications, or applications that serve files) may be impacted.
There is a denial of service vulnerability in the Content-Disposition parsing
component of Rack. This vulnerability has been assigned the CVE identifier CVE-2022-44571.
Carefully crafted input can cause Content-Disposition header parsing in Rack
to take an unexpected amount of time, possibly resulting in a denial of
service attack vector. This header is used typically used in multipart
parsing. Any applications that parse multipart posts using Rack (virtually
all Rails applications) are impacted.
There is a denial of service vulnerability in the multipart parsing component
of Rack. This vulnerability has been assigned the CVE identifier CVE-2022-44572.
Carefully crafted input can cause RFC2183 multipart boundary parsing in Rack
to take an unexpected amount of time, possibly resulting in a denial of
service attack vector. Any applications that parse multipart posts using
Rack (virtually all Rails applications) are impacted.
There is a denial of service vulnerability in the Content-Disposition parsing
component of Rack. This vulnerability has been assigned the CVE identifier CVE-2022-44571.
Carefully crafted input can cause Content-Disposition header parsing in Rack
to take an unexpected amount of time, possibly resulting in a denial of
service attack vector. This header is used typically used in multipart
parsing. Any applications that parse multipart posts using Rack (virtually
all Rails applications) are impacted.
There is a denial of service vulnerability in the multipart parsing component
of Rack. This vulnerability has been assigned the CVE identifier CVE-2022-44572.
Carefully crafted input can cause RFC2183 multipart boundary parsing in Rack
to take an unexpected amount of time, possibly resulting in a denial of
service attack vector. Any applications that parse multipart posts using
Rack (virtually all Rails applications) are impacted.
There is a possible denial of service vulnerability in the Range header
parsing component of Rack. This vulnerability has been assigned the CVE
identifier CVE-2022-44570.
Carefully crafted input can cause the Range header parsing component in Rack
to take an unexpected amount of time, possibly resulting in a denial of
service attack vector. Any applications that deal with Range requests (such
as streaming applications, or applications that serve files) may be impacted.
There is a possible shell escape sequence injection vulnerability in the Lint
and CommonLogger components of Rack. This vulnerability has been assigned the
CVE identifier CVE-2022-30123.
Versions Affected: All.
Not affected: None
Fixed Versions: 2.0.9.1, 2.1.4.1, 2.2.3.1
Impact
Carefully crafted requests can cause shell escape sequences to be written to
the terminal via Rack's Lint middleware and CommonLogger middleware. These
escape sequences can be leveraged to possibly execute commands in the victim's
terminal.
Impacted applications will have either of these middleware installed, and
vulnerable apps may have something like this:
use Rack::Lint
Or
use Rack::CommonLogger
All users running an affected release should either upgrade or use one of the
workarounds immediately.
There is a possible denial of service vulnerability in the multipart parsing
component of Rack. This vulnerability has been assigned the CVE identifier
CVE-2022-30122.
Carefully crafted multipart POST requests can cause Rack's multipart parser to
take much longer than expected, leading to a possible denial of service
vulnerability.
Impacted code will use Rack's multipart parser to parse multipart posts. This
includes directly using the multipart parser like this:
params = Rack::Multipart.parse_multipart(env)
But it also includes reading POST data from a Rack request object like this:
p request.POST # read POST data
p request.params # reads both query params and POST data
All users running an affected release should either upgrade or use one of the
workarounds immediately.
There is a possible denial of service vulnerability in the multipart parsing
component of Rack. This vulnerability has been assigned the CVE identifier
CVE-2022-30122.
Carefully crafted multipart POST requests can cause Rack's multipart parser to
take much longer than expected, leading to a possible denial of service
vulnerability.
Impacted code will use Rack's multipart parser to parse multipart posts. This
includes directly using the multipart parser like this:
params = Rack::Multipart.parse_multipart(env)
But it also includes reading POST data from a Rack request object like this:
p request.POST # read POST data
p request.params # reads both query params and POST data
All users running an affected release should either upgrade or use one of the
workarounds immediately.
There is a possible shell escape sequence injection vulnerability in the Lint
and CommonLogger components of Rack. This vulnerability has been assigned the
CVE identifier CVE-2022-30123.
Versions Affected: All.
Not affected: None
Fixed Versions: 2.0.9.1, 2.1.4.1, 2.2.3.1
Impact
Carefully crafted requests can cause shell escape sequences to be written to
the terminal via Rack's Lint middleware and CommonLogger middleware. These
escape sequences can be leveraged to possibly execute commands in the victim's
terminal.
Impacted applications will have either of these middleware installed, and
vulnerable apps may have something like this:
use Rack::Lint
Or
use Rack::CommonLogger
All users running an affected release should either upgrade or use one of the
workarounds immediately.
There is a possible denial of service vulnerability in the multipart parsing
component of Rack. This vulnerability has been assigned the CVE identifier
CVE-2022-30122.
Carefully crafted multipart POST requests can cause Rack's multipart parser to
take much longer than expected, leading to a possible denial of service
vulnerability.
Impacted code will use Rack's multipart parser to parse multipart posts. This
includes directly using the multipart parser like this:
params = Rack::Multipart.parse_multipart(env)
But it also includes reading POST data from a Rack request object like this:
p request.POST # read POST data
p request.params # reads both query params and POST data
All users running an affected release should either upgrade or use one of the
workarounds immediately.
There is a possible shell escape sequence injection vulnerability in the Lint
and CommonLogger components of Rack. This vulnerability has been assigned the
CVE identifier CVE-2022-30123.
Versions Affected: All.
Not affected: None
Fixed Versions: 2.0.9.1, 2.1.4.1, 2.2.3.1
Impact
Carefully crafted requests can cause shell escape sequences to be written to
the terminal via Rack's Lint middleware and CommonLogger middleware. These
escape sequences can be leveraged to possibly execute commands in the victim's
terminal.
Impacted applications will have either of these middleware installed, and
vulnerable apps may have something like this:
use Rack::Lint
Or
use Rack::CommonLogger
All users running an affected release should either upgrade or use one of the
workarounds immediately.
It is possible to forge a secure or host-only cookie prefix in Rack using
an arbitrary cookie write by using URL encoding (percent-encoding) on the
name of the cookie. This could result in an application that is dependent on
this prefix to determine if a cookie is safe to process being manipulated
into processing an insecure or cross-origin request.
This vulnerability has been assigned the CVE identifier CVE-2020-8184.
Versions Affected: rack < 2.2.3, rack < 2.1.4
Not affected: Applications which do not rely on __Host- and __Secure- prefixes to determine if a cookie is safe to process
Fixed Versions: rack >= 2.2.3, rack >= 2.1.4
Impact
An attacker may be able to trick a vulnerable application into processing an
insecure (non-SSL) or cross-origin request if they can gain the ability to write
arbitrary cookies that are sent to the application.
Workarounds
If your application is impacted but you cannot upgrade to the released versions or apply
the provided patch, this issue can be temporarily addressed by adding the following workaround:
module Rack
module Utils
module_function def parse_cookies_header(header)
return {} unless header
header.split(/[;] */n).each_with_object({}) do |cookie, cookies|
next if cookie.empty?
key, value = cookie.split('=', 2)
cookies[key] = (unescape(value) rescue value) unless cookies.key?(key)
end
end
end
end
It is possible to forge a secure or host-only cookie prefix in Rack using
an arbitrary cookie write by using URL encoding (percent-encoding) on the
name of the cookie. This could result in an application that is dependent on
this prefix to determine if a cookie is safe to process being manipulated
into processing an insecure or cross-origin request.
This vulnerability has been assigned the CVE identifier CVE-2020-8184.
Versions Affected: rack < 2.2.3, rack < 2.1.4
Not affected: Applications which do not rely on __Host- and __Secure- prefixes to determine if a cookie is safe to process
Fixed Versions: rack >= 2.2.3, rack >= 2.1.4
Impact
An attacker may be able to trick a vulnerable application into processing an
insecure (non-SSL) or cross-origin request if they can gain the ability to write
arbitrary cookies that are sent to the application.
Workarounds
If your application is impacted but you cannot upgrade to the released versions or apply
the provided patch, this issue can be temporarily addressed by adding the following workaround:
module Rack
module Utils
module_function def parse_cookies_header(header)
return {} unless header
header.split(/[;] */n).each_with_object({}) do |cookie, cookies|
next if cookie.empty?
key, value = cookie.split('=', 2)
cookies[key] = (unescape(value) rescue value) unless cookies.key?(key)
end
end
end
end
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.
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.
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.
There is a possible vulnerability in Rack. This vulnerability has been
assigned the CVE identifier CVE-2018-16471.
Versions Affected: All.
Not affected: None.
Fixed Versions: 2.0.6, 1.6.11
Impact
There is a possible XSS vulnerability in Rack. Carefully crafted requests can
impact the data returned by the scheme method on Rack::Request.
Applications that expect the scheme to be limited to "http" or "https" and do
not escape the return value could be vulnerable to an XSS attack.
Vulnerable code looks something like this:
<%= request.scheme.html_safe %>
Note that applications using the normal escaping mechanisms provided by Rails
may not impacted, but applications that bypass the escaping mechanisms, or do
not use them may be vulnerable.
All users running an affected release should either upgrade or use one of the
workarounds immediately.
Releases
The 2.0.6 and 1.6.11 releases are available at the normal locations.
Workarounds
The following monkey patch can be applied to work around this issue:
require "rack"
require "rack/request"
class Rack::Request
SCHEME_WHITELIST = %w(https http).freeze
def scheme
if get_header(Rack::HTTPS) == 'on'
'https'
elsif get_header(HTTP_X_FORWARDED_SSL) == 'on'
'https'
elsif forwarded_scheme
forwarded_scheme
else
get_header(Rack::RACK_URL_SCHEME)
end
end
def forwarded_scheme
scheme_headers = [
get_header(HTTP_X_FORWARDED_SCHEME),
get_header(HTTP_X_FORWARDED_PROTO).to_s.split(',')[0]
]
scheme_headers.each do |header|
return header if SCHEME_WHITELIST.include?(header)
end
nil
end
end
There is a possible DoS vulnerability in the multipart parser in Rack.
Carefully crafted requests can cause the multipart parser to enter a
pathological state, causing the parser to use CPU resources disproportionate to
the request size.
Impacted code can look something like this:
Rack::Request.new(env).params
But any code that uses the multi-part parser may be vulnerable.
Rack users that have manually adjusted the buffer size in the multipart parser
may be vulnerable as well.
All users running an affected release should either upgrade or use one of the
workarounds immediately.
Releases
The 2.0.6 release is available at the normal locations.
Workarounds
To work around this issue, the following code can be used:
Response.[] and MockResponse.[] for creating instances using status, headers, and body. (@ioquatix)
Convenient cache and content type methods for Rack::Response. (#1555, @ioquatix)
Changed
Request#params no longer rescues EOFError. (@jeremyevans)
Directory uses a streaming approach, significantly improving time to first byte for large directories. (@jeremyevans)
Directory no longer includes a Parent directory link in the root directory index. (@jeremyevans)
QueryParser#parse_nested_query uses original backtrace when reraising exception with new class. (@jeremyevans)
ConditionalGet follows RFC 7232 precedence if both If-None-Match and If-Modified-Since headers are provided. (@jeremyevans)
.ru files supports the frozen-string-literal magic comment. (@eregon)
Rely on autoload to load constants instead of requiring internal files, make sure to require 'rack' and not just 'rack/...'. (@jeremyevans)
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-Dispositionfilename if the UploadedFile instance has one. (@jeremyevans)
Request#ssl? is true for the wss scheme (secure websockets). (@jeremyevans)
Rack::HeaderHash is memoized by default. (#1549, @ioquatix)
Rework host/hostname/authority implementation in Rack::Request. #host and #host_with_port have been changed to correctly return IPv6 addresses formatted with square brackets, as defined by RFC3986. (#1561, @ioquatix)
Rack::Builder parsing options on first #\ line is deprecated. (#1574, @ioquatix)
Removed
Directory#path as it was not used and always returned nil. (@jeremyevans)
BodyProxy#each as it was only needed to work around a bug in Ruby <1.9.3. (@jeremyevans)
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)
Remove Rack::Files#response_body as the implementation was broken. (#1153, @ioquatix)
Remove SERVER_ADDR which was never part of the original SPEC. (#1573, @ioquatix)
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🚨 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?
↗️ rack (indirect, 2.0.5 → 2.2.6.4) · Repo · Changelog
Security Advisories 🚨
🚨 Possible Denial of Service Vulnerability in Rack’s header parsing
🚨 Possible DoS Vulnerability in Multipart MIME parsing
🚨 Possible DoS Vulnerability in Multipart MIME parsing
🚨 Possible DoS Vulnerability in Multipart MIME parsing
🚨 Denial of service via header parsing in Rack
🚨 Denial of Service Vulnerability in Rack Content-Disposition parsing
🚨 Denial of service via multipart parsing in Rack
🚨 Denial of service via header parsing in Rack
🚨 Denial of Service Vulnerability in Rack Content-Disposition parsing
🚨 Denial of service via multipart parsing in Rack
🚨 Denial of Service Vulnerability in Rack Content-Disposition parsing
🚨 Denial of service via multipart parsing in Rack
🚨 Denial of service via header parsing in Rack
🚨 Possible shell escape sequence injection vulnerability in Rack
🚨 Denial of Service Vulnerability in Rack Multipart Parsing
🚨 Denial of Service Vulnerability in Rack Multipart Parsing
🚨 Possible shell escape sequence injection vulnerability in Rack
🚨 Denial of Service Vulnerability in Rack Multipart Parsing
🚨 Possible shell escape sequence injection vulnerability in Rack
🚨 Percent-encoded cookies can be used to overwrite existing prefixed cookie names
🚨 Percent-encoded cookies can be used to overwrite existing prefixed cookie names
🚨 Directory traversal in Rack::Directory app bundled with Rack
🚨 Directory traversal in Rack::Directory app bundled with Rack
🚨 Possible information leak / session hijack vulnerability
🚨 Possible XSS vulnerability in Rack
🚨 Possible DoS vulnerability in Rack
Release Notes
2.2.2 (from changelog)
2.2.1 (from changelog)
2.2.0 (from changelog)
2.1.2 (from changelog)
2.1.1 (from changelog)
2.1.0 (from changelog)
2.0.8 (from changelog)
Does any of this look wrong? Please let us know.
Commits
See the full diff on Github. The new version differs by more commits than we can show here.
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