(RHSA-2016:0455) Important: ruby193 security update

The ruby193 collection provides Ruby version 1.9.3 and Ruby on Rails
version 3.2. Ruby on Rails is a model-view-controller (MVC) framework for
web application development.

The following issues were corrected in rubygem-actionpack:

Multiple directory traversal flaws were found in the way the Action View
component searched for templates for rendering. If an application passed
untrusted input to the ‘render’ method, a remote, unauthenticated attacker
could use these flaws to render unexpected files and, possibly, execute
arbitrary code. (CVE-2016-0752, CVE-2016-2097)

A code injection flaw was found in the way the Action View component
searched for templates for rendering. If an application passed untrusted
input to the ‘render’ method, a remote, unauthenticated attacker could use
this flaw to execute arbitrary code. (CVE-2016-2098)

A flaw was found in the way the Action Pack component performed MIME type
lookups. Since queries were cached in a global cache of MIME types, an
attacker could use this flaw to grow the cache indefinitely, potentially
resulting in a denial of service. (CVE-2016-0751)

A flaw was found in the way the Action Controller component compared user
names and passwords when performing HTTP basic authentication. Time taken
to compare strings could differ depending on input, possibly allowing a
remote attacker to determine valid user names and passwords using a timing
attack. (CVE-2015-7576)

The following issue was corrected in rubygem-activerecord:

A flaw was found in the Active Record component’s handling of nested
attributes in combination with the destroy flag. An attacker could possibly
use this flaw to set attributes to invalid values or clear all attributes.
(CVE-2015-7577)

Red Hat would like to thank the Ruby on Rails project for reporting these
issues. Upstream acknowledges John Poulin as the original reporter of
CVE-2016-0752, Jyoti Singh and Tobias Kraze (makandra) as original
reporters of CVE-2016-2097, Tobias Kraze (makandra) and joernchen
(Phenoelit) as original reporters of CVE-2016-2098, Aaron Patterson (Red
Hat) as the original reporter of CVE-2016-0751, Daniel Waterworth as the
original reporter of CVE-2015-7576, and Justin Coyne as the original
reporter of CVE-2015-7577.

All ruby193 collection rubygem-actionpack and rubygem-activerecord packages
users are advised to upgrade to these updated packages, which contain
backported patches to correct these issues. All running applications using
the ruby193 collection must be restarted for this update to take effect.