Confirmed on trusty that LightDM does not start when XDMCP is configured with an unknown key.
** Tags removed: verification-needed-trusty ** Tags added: verification-done-trusty -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1517685 Title: XDMCP server starts without authentication if configured key does not exist Status in Light Display Manager: Fix Released Status in Light Display Manager 1.10 series: Fix Released Status in Light Display Manager 1.14 series: Fix Released Status in Light Display Manager 1.16 series: Fix Released Status in Light Display Manager 1.2 series: Fix Released Status in lightdm package in Ubuntu: New Status in lightdm source package in Precise: New Status in lightdm source package in Trusty: Fix Committed Status in lightdm source package in Vivid: Fix Committed Status in lightdm source package in Wily: Fix Committed Bug description: [Impact] An incorrectly configured XDMCP server will start without authentication instead of disabling XDMCP / stopping LightDM. [Test Case] 1. Set up LightDM to run an XDMCP server using an XDM authentication key, i.e. in lightdm.conf: [XDMCPServer] enabled=true key=key-name 2. Do not create /etc/lightdm/keys.conf or do not define 'key-name' in keys.conf. 3. Start LightDM 4. Connect XDMCP client. Expected result: Either LightDM doesn't start or the XDMCP server doesn't start. Observed result: XDMCP server starts without authentication, any XDMCP client is able to connect. Debug message printed to log warning about missing key, but not easy to spot. [Regression Potential] Low - change is to not start LightDM if this case occurs. This could affect someone who currently has a misconfigured LightDM. In this case a warning message is printed to the log. To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/1517685/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
