[SECURITY] Fedora 25 Update: lightdm-1.18.3-5.fc25

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Fedora Update Notification
FEDORA-2017-66adafeb3b
2017-09-14 18:52:21.895851
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Name        : lightdm
Product     : Fedora 25
Version     : 1.18.3
Release     : 5.fc25
URL         : https://launchpad.net/lightdm/1.18
Summary     : A cross-desktop Display Manager
Description :
Lightdm is a display manager that:
* Is cross-desktop - supports different desktops
* Supports different display technologies
* Is lightweight - low memory usage and fast performance

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Update Information:

- Disable guest login as system default preset (CVE-2017-8900)
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade lightdm' 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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