Red Hat Security Advisory: ruby security and bug fix update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2013:0129 Final 1 1 2013-01-08T04:29:00Z Current version 2013-01-08T04:29:00Z 2013-01-08T04:29:00Z Red Hat rhsa-to-cvrf 1.0.1484 2013-01-08T05:07:01Z Updated ruby packages that fix two security issues and one bug are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks. It was found that certain methods did not sanitize file names before passing them to lower layer routines in Ruby. If a Ruby application created files with names based on untrusted input, it could result in the creation of files with different names than expected. (CVE-2012-4522) It was found that the RHSA-2011:0909 update did not correctly fix the CVE-2011-1005 issue, a flaw in the method for translating an exception message into a string in the Exception class. A remote attacker could use this flaw to bypass safe level 4 restrictions, allowing untrusted (tainted) code to modify arbitrary, trusted (untainted) strings, which safe level 4 restrictions would otherwise prevent. (CVE-2012-4481) The CVE-2012-4481 issue was discovered by Vit Ondruch of Red Hat. This update also fixes the following bug: * Prior to this update, the "rb_syck_mktime" option could, under certain circumstances, terminate with a segmentation fault when installing libraries with certain gems. This update modifies the underlying code so that Ruby gems can be installed as expected. (BZ#834381) All users of Ruby are advised to upgrade to these updated packages, which contain backported patches to resolve these issues. Please see https://www.redhat.com/footer/terms-of-use.html Copyright © 2013 Red Hat, Inc. All rights reserved. Moderate https://rhn.redhat.com/errata/RHSA-2013-0129.html https://rhn.redhat.com/errata/RHSA-2013-0129.html https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/updates/classification/#moderate https://rhn.redhat.com/errata/RHSA-2011-0909.html https://rhn.redhat.com/errata/RHSA-2011-0909.html Red Hat Enterprise Linux Desktop (v. 5 client) RHEL Desktop Workstation (v. 5 client) Red Hat Enterprise Linux (v. 5 server) ruby-1.8.5-27.el5.src.rpm ruby-1.8.5-27.el5 as a component of Red Hat Enterprise Linux Desktop (v. 5 client) ruby-1.8.5-27.el5 as a component of RHEL Desktop Workstation (v. 5 client) ruby-1.8.5-27.el5 as a component of Red Hat Enterprise Linux (v. 5 server) It was found that the RHSA-2011:0909 update did not correctly fix the CVE-2011-1005 issue, a flaw in the method for translating an exception message into a string in the Exception class. A remote attacker could use this flaw to bypass safe level 4 restrictions, allowing untrusted (tainted) code to modify arbitrary, trusted (untainted) strings, which safe level 4 restrictions would otherwise prevent. The CVE-2012-4481 issue was discovered by Vit Ondruch of Red Hat. 2012-10-05T00:00:00Z 2012-10-05T00:00:00Z CVE-2012-4481 5Client-Workstation:ruby-1.8.5-27.el5 5Client:ruby-1.8.5-27.el5 5Server:ruby-1.8.5-27.el5 Low 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258 https://rhn.redhat.com/errata/RHSA-2013-0129.html https://www.redhat.com/security/data/cve/CVE-2012-4481.html CVE-2012-4481 https://bugzilla.redhat.com/show_bug.cgi?id=863484 bz#863484: CVE-2012-4481 ruby: Incomplete fix for CVE-2011-1005 for NameError#to_s method when used on objects This issue was discovered by Vit Ondruch of Red Hat. It was found that certain methods did not sanitize file names before passing them to lower layer routines in Ruby. If a Ruby application created files with names based on untrusted input, it could result in the creation of files with different names than expected. 2012-10-12T00:00:00Z 2012-10-12T00:00:00Z CVE-2012-4522 5Client-Workstation:ruby-1.8.5-27.el5 5Client:ruby-1.8.5-27.el5 5Server:ruby-1.8.5-27.el5 Moderate 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258 https://rhn.redhat.com/errata/RHSA-2013-0129.html https://www.redhat.com/security/data/cve/CVE-2012-4522.html CVE-2012-4522 https://bugzilla.redhat.com/show_bug.cgi?id=865940 bz#865940: CVE-2012-4522 ruby: unintentional file creation caused by inserting an illegal NUL character