Important: ruby:2.6 security update

Topic

An update for the ruby:2.6 module is now available for Red Hat Enterprise Linux 8.2 Extended Update Support.

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)
• ruby: NUL injection vulnerability of File.fnmatch and File.fnmatch? (CVE-2019-15845)
• ruby: Regular expression denial of service vulnerability of WEBrick's Digest authentication (CVE-2019-16201)
• ruby: Code injection via command argument of Shell#test / Shell#[] (CVE-2019-16255)
• rubygem-json: Unsafe object creation vulnerability in JSON (CVE-2020-10663)
• ruby: BasicSocket#read_nonblock method leads to information disclosure (CVE-2020-10933)
• ruby: Potential HTTP request smuggling in WEBrick (CVE-2020-25613)
• ruby: XML round-trip vulnerability in REXML (CVE-2021-28965)
• 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)
• ruby: HTTP response splitting in WEBrick (CVE-2019-16254)

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 - Extended Update Support 8.2 x86_64
• Red Hat Enterprise Linux Server - AUS 8.2 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.2 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.2 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.2 aarch64
• Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.2 ppc64le
• Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.2 x86_64

Fixes

• BZ - 1773728 - CVE-2019-16201 ruby: Regular expression denial of service vulnerability of WEBrick's Digest authentication
• BZ - 1789407 - CVE-2019-15845 ruby: NUL injection vulnerability of File.fnmatch and File.fnmatch?
• BZ - 1789556 - CVE-2019-16254 ruby: HTTP response splitting in WEBrick
• BZ - 1793683 - CVE-2019-16255 ruby: Code injection via command argument of Shell#test / Shell#[]
• BZ - 1827500 - CVE-2020-10663 rubygem-json: Unsafe object creation vulnerability in JSON
• BZ - 1833291 - CVE-2020-10933 ruby: BasicSocket#read_nonblock method leads to information disclosure
• BZ - 1883623 - CVE-2020-25613 ruby: Potential HTTP request smuggling in WEBrick
• BZ - 1947526 - CVE-2021-28965 ruby: XML round-trip vulnerability in REXML
• 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-2019-15845
• CVE-2019-16201
• CVE-2019-16254
• CVE-2019-16255
• CVE-2020-10663
• CVE-2020-10933
• CVE-2020-25613
• CVE-2020-36327
• CVE-2021-28965
• 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