A rubygem-kramdown security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: rubygem-kramdown-2.3.1-1.fc34

--------------------------------------------------------------------------------
Fedora Update Notification
FEDORA-2021-139a6a2f9d
2021-03-26 00:15:07.081055
--------------------------------------------------------------------------------

Name : rubygem-kramdown
Product : Fedora 34
Version : 2.3.1
Release : 1.fc34
URL :   http://kramdown.rubyforge.org
Summary : Fast, pure-Ruby Markdown-superset converter
Description :
kramdown is yet-another-markdown-parser but fast, pure Ruby,
using a strict syntax definition and supporting several common extensions.

--------------------------------------------------------------------------------
Update Information:

New version 2.3.1 is released. Note that a possible security related issue is
found on the previous version of rubygem-kramdown where kramdown does not
restrict custom Rouge formatters within Rouge::Formatters namespace. This issue
is now assigned as CVE-2021-28834. This new rpm should fix this issue.
--------------------------------------------------------------------------------
ChangeLog:

* Sun Mar 21 2021 Mamoru TASAKA - 2.3.0-1
- 2.3.1
* Sun Mar 21 2021 Mamoru TASAKA - 2.3.0-3
- Apply upstream fix for CVE-2021-28834 (rouge formatter namespace restriction)
--------------------------------------------------------------------------------
References:

[ 1 ] Bug #1941045 - CVE-2021-28834 rubygem-kramdown: allows arbitrary classes to be instantiated [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1941045
--------------------------------------------------------------------------------

This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-139a6a2f9d' 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