A log4j security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: log4j-2.16.0-1.fc34

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Fedora Update Notification
FEDORA-2021-66d6c484f3
2021-12-22 01:12:27.897393
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Name : log4j
Product : Fedora 34
Version : 2.16.0
Release : 1.fc34
URL :   http://logging.apache.org/log4j
Summary : Java logging package
Description :
Log4j is a tool to help the programmer output log statements to a
variety of output targets.

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Update Information:

This update provides log4j 2.16.0, to address the critical vulnerability
CVE-2021-44228 ("Log4Shell"). Note with 2.16.0, JNDI is entirely disabled by
default; to use it, you must set `log4j2.enableJndi` (please carefully consider
potential security issues before doing so). The updated jansi adds (back) a
feature, `AnsiRenderer`, which the newer log4j requires; this is the only change
to jansi. For other changes in log4j 2.16.0, see the [upstream
changelog](  https://logging.apache.org/log4j/2.x/changes-report.html#a2.16.0).
Most changes are compatible enhancements or bug fixes, but there may be some
behaviour changes.
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ChangeLog:

* Mon Dec 13 2021 Adam Williamson - 2.16.0-1
- Update to 2.16.0 (fixes critical CVE-2021-44228)
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References:

[ 1 ] Bug #2030945 - CVE-2021-44228 log4j: log4j-core: Remote code execution in Log4j 2.x when logs contain an attacker-controlled string value [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=2030945
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-66d6c484f3' 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
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