#595311 openssh-client: untrusted X11 forwarding broken

Package:
openssh-client
Source:
openssh
Description:
secure shell (SSH) client, for secure access to remote machines
Submitter:
Andreas Ferber
Date:
2010-09-02 22:24:04 UTC
Severity:
important
#595311#5
Date:
2010-09-02 22:02:50 UTC
From:
To:
After upgrading my system to testing, X11 forwarding in ssh stopped
working. When trying to open a connection with untrusted X11 forwarding,
the following happens:
-----------
% ssh -X sirius6
Warning: untrusted X11 forwarding setup failed: xauth key data not generated
Warning: No xauth data; using fake authentication data for X11 forwarding.
% echo $DISPLAY
localhost:10.0
% xterm
Invalid MIT-MAGIC-COOKIE-1 keyxterm Xt error: Can't open display: localhost:10.0
-----------

However TRUSTED X11 forwarding (-Y) works as expected.

Debug output doesn't reveal anything, ssh is calling the correct xauth
binary, however somehow the remote side doesn't get a valid cookie.

Andreas