Bug#563406: [gdm] XDMCP remote login dos not work

[Andrzej Zięba]

Package: gdm
Version: 2.20.10-1
Severity: normal

--- Please enter the report below this line. ---


I have turned debug logging on and this is what I get in the syslog:

(...)
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Attempting to parse key string: 
xdmcp/Enable=false
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Accepting XDMCP connections...
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Attempting to parse key string: 
xdmcp/Port=177
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Attempting to parse key string: 
chooser/Multicast=false
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Attempting to parse key string: 
chooser/MulticastAddr=ff02::1
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Attempting to parse key string: 
xdmcp/HonorIndirect=true
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Attempting to parse key string: 
xdmcp/DisplaysPerHost=2
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Attempting to parse key string: 
xdmcp/MaxSessions=16
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Attempting to parse key string: 
xdmcp/MaxPending=4
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Attempting to parse key string: 
xdmcp/MaxWait=15
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: Attempting to parse key string: 
xdmcp/Willing=/etc/gdm/Xwilling
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: XDMCP: Start up on host azieba, 
port 177
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: XDMCP: addrinfo family=inet6 
type=datagram proto=UDP flags=passive
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: XDMCP: Attempting to bind to 
host :: port 177
Jan  2 16:11:48 azieba gdm[2002]: DEBUG: XDMCP: Starting to listen on 
XDMCP port
(...)

so I thought it should listen, but I have also done network sniff with 
wireshark on the server and I get:

4	0.004196	192.168.178.22	192.168.178.23	XDMCP	Query
5	0.004251	192.168.178.23	192.168.178.22	ICMP	Destination unreachable 
(Port unreachable)

There is no firewall on 192.168.178.23.


--- System information. ---
Architecture: i386
Kernel:       Linux 2.6.30-2-686

Debian Release: squeeze/sid
   990 testing         security.debian.org
   990 testing         ftp.task.gda.pl

--- Package information. ---
Depends                      (Version) | Installed
======================================-+-===============
libart-2.0-2               (>= 2.3.18) | 2.3.20-2
libatk1.0-0                (>= 1.20.0) | 1.28.0-1
libattr1                 (>= 2.4.41-1) | 1:2.4.44-1
libc6                    (>= 2.3.6-6~) | 2.10.2-2
libcairo2                   (>= 1.2.4) | 1.8.8-2
libdbus-1-3                 (>= 1.0.2) | 1.2.16-2
libdbus-glib-1-2             (>= 0.78) | 0.82-2
libdmx1                                | 1:1.0.2-3
libfontconfig1              (>= 2.4.0) | 2.6.0-4.2
libfreetype6                (>= 2.2.1) | 2.3.11-1
libglade2-0               (>= 1:2.6.1) | 1:2.6.4-1
libglib2.0-0               (>= 2.16.0) | 2.22.3-1
libgnomecanvas2-0          (>= 2.11.1) | 2.26.0-1
libgtk2.0-0                (>= 2.18.0) | 2.18.3-1
libpam0g                 (>= 0.99.7.1) | 1.1.0-4
libpango1.0-0              (>= 1.14.0) | 1.26.2-1
librsvg2-2                 (>= 2.26.0) | 2.26.0-1
libselinux1                  (>= 1.32) | 2.0.89-4
libwrap0                   (>= 7.6-4~) | 7.6.q-18
libx11-6                               | 2:1.3.2-1
libxau6                                | 1:1.0.5-1
libxdmcp6                              | 1:1.0.3-1
libxext6                               | 2:1.0.4-1
libxi6                                 | 2:1.2.1-2
libxinerama1                           | 2:1.0.3-2
libxml2                     (>= 2.7.4) | 2.7.6.dfsg-1
debconf                      (>= 0.5)  | 1.5.28
  OR debconf-2.0                        |
adduser                                | 3.112
libpam-modules             (>= 0.72-1) | 1.1.0-4
libpam-runtime          (>= 0.76-13.1) | 1.1.0-4
gnome-session                          |
  OR x-session-manager                  |
  OR x-window-manager                   |
  OR x-terminal-emulator                |
gksu                        (>= 1.0.7) | 2.0.2-2+b1
lsb-base                   (>= 3.2-14) | 3.2-23
librsvg2-common                        | 2.26.0-1


Recommends          (Version) | Installed
=============================-+-===========
whiptail                      | 0.52.10-5
  OR dialog                    | 1.1-20080819-1
zenity                        | 2.28.0-1
gdm-themes                    | 0.6.2
xserver-xephyr                |
  OR xnest                     |
xserver-xorg                  | 1:7.4+4


Suggests                  (Version) | Installed
===================================-+-===========
locales                             | 2.10.2-2
pm-utils                            | 1.2.6.1-3
libpam-gnome-keyring                | 2.28.2-1



Regards,

-- 
Andrzej Zięba
Pruszcz Gdański
Poland