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[Bug 1390808] Re: VNC / XDMCP server cannot be configured to listen on specific interfaces

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1390808@xxxxxxxxxxxxxxxxxx>
Date: Wed, 16 Dec 2015 14:46:09 -0000
Reply-to: Bug 1390808 <1390808@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

This bug was fixed in the package lightdm - 1.14.4-0ubuntu1

---------------
lightdm (1.14.4-0ubuntu1) vivid; urgency=medium

  * New upstream release:
    - Handle XDMCP Request packet with no addresses. (LP: #1516831)
    - 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.
    - Add more tests.

 -- Robert Ancell <robert.ancell@xxxxxxxxxxxxx>  Fri, 20 Nov 2015
16:01:15 +1300

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

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https://bugs.launchpad.net/bugs/1390808

Title:
  VNC / XDMCP server cannot be configured to listen on specific
  interfaces

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:
  Triaged
Status in lightdm source package in Trusty:
  Fix Released
Status in lightdm source package in Vivid:
  Fix Released

Bug description:
  [Impact]
  The XDMCP and VNC servers in LightDM allow connections on any network interface. It is desirable for these to be limited to a particular interface to limit who can connect (i.e. only allow local connections on 127.0.0.1).

  [Test Case]
  1. Enable the VNC server in LightDM in lightdm.conf:
  [VNCServer]
  enabled=true
  listen-address=127.0.0.1
  2. Start LightDM
  With this setup you should only be able to make a local connection.

  [Regression potential]
  Low. If the option is not set LightDM has the old behaviour.

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