A ruby security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: ruby-3.0.2-149.fc34

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Fedora Update Notification
FEDORA-2021-36cdab1f8d
2021-07-29 01:06:35.173516
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Name : ruby
Product : Fedora 34
Version : 3.0.2
Release : 149.fc34
URL :   https://www.ruby-lang.org/
Summary : An interpreter of object-oriented scripting language
Description :
Ruby is the interpreted scripting language for quick and easy
object-oriented programming. It has many features to process text
files and to do system management tasks (as in Perl). It is simple,
straight-forward, and extensible.

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Update Information:

Security fix for CVE-2020-36327 CVE-2021-31799 CVE-2021-31810 CVE-2021-32066
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ChangeLog:

* Tue Jul 13 2021 Jarek Prokop - 3.0.2-149
- Upgrade to Ruby 3.0.2.
- Fix command injection vulnerability in RDoc.
Resolves: CVE-2021-31799
- Fix FTP PASV command response can cause Net::FTP to connect to arbitrary host.
Resolves: CVE-2021-31810
- Fix StartTLS stripping vulnerability in Net::IMAP.
Resolves: CVE-2021-32066
- Fix dependencies of gems with explicit source installed from a different
source.
Resolves: CVE-2020-36327
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References:

[ 1 ] Bug #1958999 - CVE-2020-36327 rubygem-bundler: Dependencies of gems with explicit source may be installed from a different source
  https://bugzilla.redhat.com/show_bug.cgi?id=1958999
[ 2 ] Bug #1980126 - CVE-2021-31810 ruby: FTP PASV command response can cause Net::FTP to connect to arbitrary host
  https://bugzilla.redhat.com/show_bug.cgi?id=1980126
[ 3 ] Bug #1980128 - CVE-2021-32066 ruby: StartTLS stripping vulnerability in Net::IMAP
  https://bugzilla.redhat.com/show_bug.cgi?id=1980128
[ 4 ] Bug #1980132 - CVE-2021-31799 rubygem-rdoc: Command injection vulnerability in RDoc
  https://bugzilla.redhat.com/show_bug.cgi?id=1980132
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-36cdab1f8d' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys