A xscreensaver security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: xscreensaver-5.45-2.fc33

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Fedora Update Notification
FEDORA-2021-5af4452ffd
2021-08-19 01:10:36.707704
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Name : xscreensaver
Product : Fedora 33
Version : 5.45
Release : 2.fc33
URL :   http://www.jwz.org/xscreensaver/
Summary : X screen saver and locker
Description :
A modular screen saver and locker for the X Window System.
More than 200 display modes are included in this package.

This is a metapackage for installing all default packages
related to XScreenSaver.

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Update Information:

A potential security flaw was found on xscreensaver 5.45 which may cause buffer
overflow or crash xscreensaver daemon. This vulnerability was assigned as
CVE-2021-34557. This new rpm should fix this issue. Note that this issue does
not affect xscreensaver 6.00 and above, so Fedora 34 xscreensaver is not
affected.
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ChangeLog:

* Tue Aug 10 2021 Mamoru TASAKA - 1:5.45-2
- update_screen_layout: fix CVE-2021-34557 (bug 1974194)
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References:

[ 1 ] Bug #1974194 - CVE-2021-34557 XScreenSaver: buffer overflow in update_screen_layout() allows an attacker to bypass the standard screen lock authentication
  https://bugzilla.redhat.com/show_bug.cgi?id=1974194
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-5af4452ffd' 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