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====================================================================                   
Red Hat Security Advisory

Synopsis:          Moderate: ruby security update
Advisory ID:       RHSA-2020:0591-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:0591
Issue date:        2020-02-25
CVE Names:         CVE-2018-8777 CVE-2018-8780 CVE-2018-1000073
                   CVE-2018-1000074 CVE-2018-1000075 CVE-2018-1000076
                   CVE-2018-1000077 CVE-2018-1000078 CVE-2018-1000079
====================================================================
1. Summary:

An update for ruby is now available for Red Hat Enterprise Linux 7.4
Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP
Solutions.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server AUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.4) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server TUS (v. 7.4) - noarch, x86_64

3. Description:

Ruby is an extensible, interpreted, object-oriented, scripting language. It
has features to process text files and to perform system management tasks.

Security Fix(es):

* ruby: DoS by large request in WEBrick (CVE-2018-8777)

* ruby: Unintentional directory traversal by poisoned NULL byte in Dir
(CVE-2018-8780)

* rubygems: Path traversal when writing to a symlinked basedir outside of
the root (CVE-2018-1000073)

* rubygems: Unsafe Object Deserialization Vulnerability in gem owner
allowing arbitrary code execution on specially crafted YAML
(CVE-2018-1000074)

* rubygems: Improper verification of signatures in tarball allows to
install mis-signed gem (CVE-2018-1000076)

* rubygems: Missing URL validation on spec home attribute allows malicious
gem to set an invalid homepage URL (CVE-2018-1000077)

* rubygems: XSS vulnerability in homepage attribute when displayed via gem
server (CVE-2018-1000078)

* rubygems: Path traversal issue during gem installation allows to write to
arbitrary filesystem locations (CVE-2018-1000079)

* rubygems: Infinite loop vulnerability due to negative size in tar header
causes Denial of Service (CVE-2018-1000075)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1547418 - CVE-2018-1000073 rubygems: Path traversal when writing to a symlinked basedir outside of the root
1547419 - CVE-2018-1000074 rubygems: Unsafe Object Deserialization Vulnerability in gem owner allowing arbitrary code execution on specially crafted YAML
1547420 - CVE-2018-1000075 rubygems: Infinite loop vulnerability due to negative size in tar header causes Denial of Service
1547421 - CVE-2018-1000076 rubygems: Improper verification of signatures in tarball allows to install mis-signed gem
1547422 - CVE-2018-1000077 rubygems: Missing URL validation on spec home attribute allows malicious gem to set an invalid homepage URL
1547425 - CVE-2018-1000078 rubygems: XSS vulnerability in homepage attribute when displayed via gem server
1547426 - CVE-2018-1000079 rubygems: Path traversal issue during gem installation allows to write to arbitrary filesystem locations
1561949 - CVE-2018-8780 ruby: Unintentional directory traversal by poisoned NULL byte in Dir
1561950 - CVE-2018-8777 ruby: DoS by large request in WEBrick

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.4):

Source:
ruby-2.0.0.648-35.el7_4.src.rpm

noarch:
ruby-irb-2.0.0.648-35.el7_4.noarch.rpm
rubygem-rdoc-4.0.0-35.el7_4.noarch.rpm
rubygems-2.0.14.1-35.el7_4.noarch.rpm

x86_64:
ruby-2.0.0.648-35.el7_4.x86_64.rpm
ruby-debuginfo-2.0.0.648-35.el7_4.i686.rpm
ruby-debuginfo-2.0.0.648-35.el7_4.x86_64.rpm
ruby-libs-2.0.0.648-35.el7_4.i686.rpm
ruby-libs-2.0.0.648-35.el7_4.x86_64.rpm
rubygem-bigdecimal-1.2.0-35.el7_4.x86_64.rpm
rubygem-io-console-0.4.2-35.el7_4.x86_64.rpm
rubygem-json-1.7.7-35.el7_4.x86_64.rpm
rubygem-psych-2.0.0-35.el7_4.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.4):

Source:
ruby-2.0.0.648-35.el7_4.src.rpm

noarch:
ruby-irb-2.0.0.648-35.el7_4.noarch.rpm
rubygem-rdoc-4.0.0-35.el7_4.noarch.rpm
rubygems-2.0.14.1-35.el7_4.noarch.rpm

ppc64le:
ruby-2.0.0.648-35.el7_4.ppc64le.rpm
ruby-debuginfo-2.0.0.648-35.el7_4.ppc64le.rpm
ruby-libs-2.0.0.648-35.el7_4.ppc64le.rpm
rubygem-bigdecimal-1.2.0-35.el7_4.ppc64le.rpm
rubygem-io-console-0.4.2-35.el7_4.ppc64le.rpm
rubygem-json-1.7.7-35.el7_4.ppc64le.rpm
rubygem-psych-2.0.0-35.el7_4.ppc64le.rpm

x86_64:
ruby-2.0.0.648-35.el7_4.x86_64.rpm
ruby-debuginfo-2.0.0.648-35.el7_4.i686.rpm
ruby-debuginfo-2.0.0.648-35.el7_4.x86_64.rpm
ruby-libs-2.0.0.648-35.el7_4.i686.rpm
ruby-libs-2.0.0.648-35.el7_4.x86_64.rpm
rubygem-bigdecimal-1.2.0-35.el7_4.x86_64.rpm
rubygem-io-console-0.4.2-35.el7_4.x86_64.rpm
rubygem-json-1.7.7-35.el7_4.x86_64.rpm
rubygem-psych-2.0.0-35.el7_4.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.4):

Source:
ruby-2.0.0.648-35.el7_4.src.rpm

noarch:
ruby-irb-2.0.0.648-35.el7_4.noarch.rpm
rubygem-rdoc-4.0.0-35.el7_4.noarch.rpm
rubygems-2.0.14.1-35.el7_4.noarch.rpm

x86_64:
ruby-2.0.0.648-35.el7_4.x86_64.rpm
ruby-debuginfo-2.0.0.648-35.el7_4.i686.rpm
ruby-debuginfo-2.0.0.648-35.el7_4.x86_64.rpm
ruby-libs-2.0.0.648-35.el7_4.i686.rpm
ruby-libs-2.0.0.648-35.el7_4.x86_64.rpm
rubygem-bigdecimal-1.2.0-35.el7_4.x86_64.rpm
rubygem-io-console-0.4.2-35.el7_4.x86_64.rpm
rubygem-json-1.7.7-35.el7_4.x86_64.rpm
rubygem-psych-2.0.0-35.el7_4.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.4):

noarch:
ruby-doc-2.0.0.648-35.el7_4.noarch.rpm
rubygem-minitest-4.3.2-35.el7_4.noarch.rpm
rubygem-rake-0.9.6-35.el7_4.noarch.rpm
rubygems-devel-2.0.14.1-35.el7_4.noarch.rpm

x86_64:
ruby-debuginfo-2.0.0.648-35.el7_4.x86_64.rpm
ruby-devel-2.0.0.648-35.el7_4.x86_64.rpm
ruby-tcltk-2.0.0.648-35.el7_4.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.4):

noarch:
ruby-doc-2.0.0.648-35.el7_4.noarch.rpm
rubygem-minitest-4.3.2-35.el7_4.noarch.rpm
rubygem-rake-0.9.6-35.el7_4.noarch.rpm
rubygems-devel-2.0.14.1-35.el7_4.noarch.rpm

ppc64le:
ruby-debuginfo-2.0.0.648-35.el7_4.ppc64le.rpm
ruby-devel-2.0.0.648-35.el7_4.ppc64le.rpm
ruby-tcltk-2.0.0.648-35.el7_4.ppc64le.rpm

x86_64:
ruby-debuginfo-2.0.0.648-35.el7_4.x86_64.rpm
ruby-devel-2.0.0.648-35.el7_4.x86_64.rpm
ruby-tcltk-2.0.0.648-35.el7_4.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.4):

noarch:
ruby-doc-2.0.0.648-35.el7_4.noarch.rpm
rubygem-minitest-4.3.2-35.el7_4.noarch.rpm
rubygem-rake-0.9.6-35.el7_4.noarch.rpm
rubygems-devel-2.0.14.1-35.el7_4.noarch.rpm

x86_64:
ruby-debuginfo-2.0.0.648-35.el7_4.x86_64.rpm
ruby-devel-2.0.0.648-35.el7_4.x86_64.rpm
ruby-tcltk-2.0.0.648-35.el7_4.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2018-8777
https://access.redhat.com/security/cve/CVE-2018-8780
https://access.redhat.com/security/cve/CVE-2018-1000073
https://access.redhat.com/security/cve/CVE-2018-1000074
https://access.redhat.com/security/cve/CVE-2018-1000075
https://access.redhat.com/security/cve/CVE-2018-1000076
https://access.redhat.com/security/cve/CVE-2018-1000077
https://access.redhat.com/security/cve/CVE-2018-1000078
https://access.redhat.com/security/cve/CVE-2018-1000079
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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