touch-packages team mailing list archive

[Launchpad Bug Tracker <1481561@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package lightdm - 1.10.6-0ubuntu1

---------------
lightdm (1.10.6-0ubuntu1) trusty; urgency=medium

  * New upstream release:
    - Handle trailing whitespace on boolean values in configuration.
      (LP: #1507033)
    - Use libaudit to generate audit events.
    - Fix apparmor profiles for running Chromium in guest sessions.
      (LP: #1504049)
    - Add LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT and
      LC_IDENTIFICATION variables to the list of inherited locale variables.
      (LP: #1511259)
    - Add a backup-logs option that can be used to disable existing logging
      files having a .old suffix added to them.
    - Check the version of the X server we are running so we correctly pass
      -listen tcp when required. (LP: #1449282)
    - Use IP address of XDMCP requests to contact X server if available.
      (LP: #1481561)
    - Implement XDMCP ForwardQuery. (LP: #1511545)
    - Add an option for XDMCP and VNC servers to only listen on one address.
      (LP: #1390808)
    - Don't start LightDM if the XDMCP server is configured with a key that
      doesn't exist. (LP: #1517685)
    - Add IP addresses to XDMCP log messages.
    - Refactor XDMCP error handling.
    - Fix small memory leak in XDMCP logging code.
    - Fix typo in dm-tool man page. (LP: #1470587)
    - Use new Xmir binary when running X under Unity System Compositor.
    - Fix all the things that prevent clang (3.5) from building LightDM with
      -Werror.
    - Add more tests.

 -- Robert Ancell <robert.ancell@xxxxxxxxxxxxx>  Fri, 20 Nov 2015
16:07:50 +1300

** Changed in: lightdm (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to lightdm in Ubuntu.
https://bugs.launchpad.net/bugs/1481561

Title:
  Connect to XDMCP clients on address requests come from if available

Status in Light Display Manager:
  Fix Released
Status in Light Display Manager 1.10 series:
  Fix Committed
Status in Light Display Manager 1.14 series:
  Fix Released
Status in Light Display Manager 1.2 series:
  Fix Committed
Status in lightdm package in Ubuntu:
  Fix Released
Status in lightdm source package in Precise:
  New
Status in lightdm source package in Trusty:
  Fix Released
Status in lightdm source package in Vivid:
  Fix Committed
Status in lightdm source package in Wily:
  Fix Committed

Bug description:
  [Impact]
  Currently LightDM connects to an XDMCP enabled X server using the first suitable address in the XDMCP Request packet. However, some clients may put a number of addresses in this message and potentially they are not all routable. If the address the request message came from is in the list we should use that first as that is more likely to be a routable address. This also matches the behaviour of GDM which ignores the contents of the Request packet anyway.

  [Test Case]
  1. Start LightDM with XDMCP enabled
  2. Connect with a client that puts a number of addresses in the Request packet

  Expected result:
  LightDM prefers the address the Request came from over the other addresses.

  Observed result:
  LightDM always picks the first address.

  [Regression Potential]
  There is a possibility of a behaviour change in existing clients that had two valid addresses, though the particular address shouldn't matter (unless complex firewalling / routing rules are being used). There is a risk that XDMCP behaviour could have been broken by the change (tested with regression tests).

To manage notifications about this bug go to:
https://bugs.launchpad.net/lightdm/+bug/1481561/+subscriptions