7.5 - RHSA-2020:0591

Problem Description:

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