Important: ruby:2.6 security update

Topic

An update for the ruby:2.6 module is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Important. 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.

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):

• rubygem-bundler: Dependencies of gems with explicit source may be installed from a different source (CVE-2020-36327)
• rubygem-rdoc: Command injection vulnerability in RDoc (CVE-2021-31799)
• ruby: FTP PASV command response can cause Net::FTP to connect to arbitrary host (CVE-2021-31810)
• ruby: StartTLS stripping vulnerability in Net::IMAP (CVE-2021-32066)
• ruby: Regular expression denial of service vulnerability of Date parsing methods (CVE-2021-41817)
• ruby: Cookie prefix spoofing in CGI::Cookie.parse (CVE-2021-41819)

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.

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

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64

Fixes

• BZ - 1958999 - CVE-2020-36327 rubygem-bundler: Dependencies of gems with explicit source may be installed from a different source
• BZ - 1980126 - CVE-2021-31810 ruby: FTP PASV command response can cause Net::FTP to connect to arbitrary host
• BZ - 1980128 - CVE-2021-32066 ruby: StartTLS stripping vulnerability in Net::IMAP
• BZ - 1980132 - CVE-2021-31799 rubygem-rdoc: Command injection vulnerability in RDoc
• BZ - 2025104 - CVE-2021-41817 ruby: Regular expression denial of service vulnerability of Date parsing methods
• BZ - 2026757 - CVE-2021-41819 ruby: Cookie prefix spoofing in CGI::Cookie.parse

CVEs

• CVE-2020-36327
• CVE-2021-31799
• CVE-2021-31810
• CVE-2021-32066
• CVE-2021-41817
• CVE-2021-41819

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/articles/6206172