Fedora 33 XScreensaver Update: Critical Buffer Overflow Mitigated

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.

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.

* Tue Aug 10 2021 Mamoru TASAKA - 1:5.45-2

- update_screen_layout: fix CVE-2021-34557 (bug 1974194)

[ 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

su -c 'dnf upgrade --advisory FEDORA-2021-5af4452ffd' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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/security/

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