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Red Hat 7: RHSA-2014:1912-01 Moderate: Ruby DoS and Buffer Flaws

red hat
Calendar Grey November 26, 2014
Dist Redhat Esm H88
Important security patch for Ruby libraries in RHEL 7 addresses severe problems concerning overflow in buffers and denial-of-service vulnerabilities.
Updated ruby packages that fix three security issues are now available for Red Hat Enterprise Linux 7

Solution

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/articles/11258

Summary

Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks.
Multiple denial of service flaws were found in the way the Ruby REXML XML parser performed expansion of parameter entities. A specially crafted XML document could cause REXML to use an excessive amount of CPU and memory. (CVE-2014-8080, CVE-2014-8090)
A stack-based buffer overflow was found in the implementation of the Ruby Array pack() method. When performing base64 encoding, a single byte could be written past the end of the buffer, possibly causing Ruby to crash. (CVE-2014-4975)
The CVE-2014-8090 issue was discovered by Red Hat Product Security.
All ruby users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running instances of Ruby need to be restarted for this update to take effect.

Topics%20covered

Topics Covered

security advisory moderate Red Hat buffer overflow DoS ruby

References

https://access.redhat.com/security/cve/CVE-2014-4975 https://access.redhat.com/security/cve/CVE-2014-8080 https://access.redhat.com/security/cve/CVE-2014-8090 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: ruby-2.0.0.353-22.el7_0.src.rpm
noarch: ruby-irb-2.0.0.353-22.el7_0.noarch.rpm rubygem-rdoc-4.0.0-22.el7_0.noarch.rpm rubygems-2.0.14-22.el7_0.noarch.rpm
x86_64: ruby-2.0.0.353-22.el7_0.x86_64.rpm ruby-debuginfo-2.0.0.353-22.el7_0.i686.rpm ruby-debuginfo-2.0.0.353-22.el7_0.x86_64.rpm ruby-libs-2.0.0.353-22.el7_0.i686.rpm ruby-libs-2.0.0.353-22.el7_0.x86_64.rpm rubygem-bigdecimal-1.2.0-22.el7_0.x86_64.rpm rubygem-io-console-0.4.2-22.el7_0.x86_64.rpm rubygem-json-1.7.7-22.el7_0.x86_64.rpm rubygem-psych-2.0.0-22.el7_0.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: ruby-doc-2.0.0.353-22.el7_0.noarch.rpm rubygem-minitest-4.3.2-22.el7_0.noarch.rpm rubygem-rake-0.9.6-22.el7_0.noarch.rpm rubygems-devel-2.0.14-22.el7_0.noarch.rpm
x86_64: ruby-debuginfo-2.0.0.353-22.el7_0.x86_64.rpm ruby-devel-2.0.0.353-22.el7_0.x86_64.rpm ruby-tcltk-2.0.0.353-22.el7_0.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: ruby-2.0.0.353-22.el7_0.src.rpm
noarch: ruby-irb-2.0.0.353-22.el7_0.noarch.rpm rubygem-rdoc-4.0.0-22.el7_0.noarch.rpm rubygems-2.0.14-22.el7_0.noarch.rpm
x86_64: ruby-2.0.0.353-22.el7_0.x86_64.rpm ruby-debuginfo-2.0.0.353-22.el7_0.i686.rpm ruby-debuginfo-2.0.0.353-22.el7_0.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2014:1912-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2014:1912.html
Issue date: 2014-11-26

Topic

Updated ruby packages that fix three security issues are now available forRed Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having Moderate securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.

Topics%20covered

Topics Covered

security advisory moderate Red Hat buffer overflow DoS ruby

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64

Bugs Fixed

1118158 - CVE-2014-4975 ruby: off-by-one stack-based buffer overflow in the encodes() function

1157709 - CVE-2014-8080 ruby: REXML billion laughs attack via parameter entity expansion

1159927 - CVE-2014-8090 ruby: REXML incomplete fix for CVE-2014-8080

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