A vulnerability has been found in the way developers have implemented the archive extraction of files. An arbitrary file write vulnerability, that can be achieved using a specially crafted zip archive (affects other archives as well, bzip2, tar,xz, war, cpio, 7z), that holds path traversal filenames. So when the filename gets concatenated to the target extraction directory, the final path ends up outside of the target folder. Of course if an executable or a configuration file is overwritten with a file containing malicious code, the problem can turn into an arbitrary code execution issue quite easily. This affects multiple libraries that lacks of a high level APIs that provide the archive extraction functionality.

References: https://snyk.io/research/zip-slip-vulnerability

CloudForms Management Engine (cfme) is vulnerable to an improper security setting in the dRuby component of CloudForms. An attacker with access to an unprivileged local shell could use this flaw to execute commands as a high privileged user.

Denial of Service Vulnerability in Action View

Impact ------ Specially crafted accept headers can cause the Action View template location code to consume 100% CPU, causing the server unable to process requests. This impacts all Rails applications that render views.

All users running an affected release should either upgrade or use one of the workarounds immediately.

Releases -------- The 6.0.0.beta3, 5.2.2.1, 5.1.6.2, 5.0.7.2, and 4.2.11.1 releases are available at the normal locations.

Workarounds ----------- This vulnerability can be mitigated by wrapping render calls with respondto blocks. For example, the following example is vulnerable:

ruby class UserController < ApplicationController def index render "index" end end

But the following code is not vulnerable:

ruby class UserController < ApplicationController def index respondto |format| format.html { render "index" } end end end

Implicit rendering is impacted, so this code is vulnerable:

ruby class UserController < ApplicationController def index end end

But can be changed this this:

ruby class UserController < ApplicationController def index respondto |format| format.html { render "index" } end end end

Alternatively to specifying the format, the following monkey patch can be applied in an initializer:

$ cat config/initializers/formatsfilter.rb frozenstringliteral: true

ActionDispatch::Request.prepend(Module.new do def formats super().select do |format| format.symbol || format.ref == "/" end end end)

Please note that only the 5.2.x, 5.1.x, 5.0.x, and 4.2.x series are supported at present. Users of earlier unsupported releases are advised to upgrade as soon as possible as we cannot guarantee the continued availability of security fixes for unsupported releases.

Also note that the patches for this vulnerability are the same as CVE-2019-5418.

Credits ------- Thanks to John Hawthorn <john@hawthorn.email> of GitHub

rubygem-sprockets before versions 2.12.5, 3.7.2 and 4.0.0beta8 are vulnerable to a path traversal flaw in the sprockets/server.rb:forbiddenrequest?() function. A remote attacker could exploit this to read arbitrary files from the Sprockets server.

External References:

http://www.openwall.com/lists/oss-security/2018/06/19/2 https://blog.heroku.com/rails-asset-pipeline-vulnerability

Upstream Patch:

https://github.com/rails/sprockets/commit/c09131cf5b2c479263939c8582e22b98ed616c5f

A Broken Access Control vulnerability in Active Job versions >= 4.2.0 allows an attacker to craft user input which can cause Active Job to deserialize it using GlobalId and give them access to information that they should not have.

References: https://groups.google.com/d/msg/rubyonrails-security/FL4dSdzr2zw/zjKVhF4qBAAJ https://weblog.rubyonrails.org/2018/11/27/Rails-4-2-5-0-5-1-5-2-have-been-released/

Ansible Tower before version 3.2.4 has a flaw in the management of system and organization administrators that allows for privilege escalation. System administrators that are members of organizations can have their passwords reset by organization administrators, allowing organization administrators access to the entire system.

CloudForms Management Engine (cfme) before 5.7.3 and 5.8.x before 5.8.1 lacks RBAC controls on certain methods in the rails application portion of CloudForms. An attacker with access could use a variety of methods within the rails application portion of CloudForms to escalate privileges.

It was found that Sinatra is vulnerable to an XSS via the 400 Bad Request page that occurs upon a params parser exception.

Upstream issue:

https://github.com/sinatra/sinatra/issues/1428

Introduced by:

https://github.com/sinatra/sinatra/commit/8f8df53ff29938ace79b31097c27d9cdac803b44

Upstream patch:

https://github.com/sinatra/sinatra/commit/12786867d6faaceaec62c7c2cb5b0e2dc074d71a