A vsftpd security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: vsftpd-3.0.3-43.fc34

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Fedora Update Notification
FEDORA-2021-67164401ae
2021-10-21 16:52:35.111058
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Name : vsftpd
Product : Fedora 34
Version : 3.0.3
Release : 43.fc34
URL :   https://security.appspot.com/vsftpd.html
Summary : Very Secure Ftp Daemon
Description :
vsftpd is a Very Secure FTP daemon. It was written completely from
scratch.

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Update Information:

Security fix for CVE-2021-3618
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ChangeLog:

* Wed Oct 13 2021 Artem Egorenkov - 3.0.3-43
- ALPACA fix backported from upstram 3.0.5 version
- Resolves: rhbz#1975648
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References:

[ 1 ] Bug #1975623 - CVE-2021-3618 ALPACA: Application Layer Protocol Confusion - Analyzing and Mitigating Cracks in TLS Authentication
  https://bugzilla.redhat.com/show_bug.cgi?id=1975623
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-67164401ae' 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