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Cause
User having tcsh login shell connects to CVS remote
server.
Consequence
CVS client uses rsh instead of SSH to reach server
becuase CVS_RSH environment is not set. If the server
has disabled rsh, then the connection cannot be
established. If the rsh is enabled, then sensitive
data can leak because rsh is not encrypted.
Fix
/etc/profile.d/cvs.csh has been adjusted to use valid csh
syntax to set CVS_RSH environment variable properly at
log-in.
Result
The CVS client will use SSH transport by default even if
user's login shell is tcsh.
+++ This bug was initially created as a clone of Bug #671003 +++
Here's the content of the csh profile /etc/profile.d/cvs.csh:
# change default from rsh to ssh for cvs command
setenv CVS_RSH "${CVS_RSH-ssh}"
This is not valid tcsh syntax. This kind of variable substitution
is only valid in POSIX shells.
Right now, this bug does not result in an error when starting tcsh, but
only because current tcsh versions ignore that line for the simple reason
that it's missing a newline. However, the upcoming tcsh 6.18.00 will NOT
ignore that last line anymore and a syntax error will occur.
The correct syntax for csh and tcsh is
if ( "$?CVS_RSH" == 0 ) setenv CVS_RSH ssh
I hope this can be fixed soon. And, please add a newline since otherwise
the line will never be executed with the current tcsh 6.17.00.
Created attachment 474480[details]
/etc/profile.d/cvs.csh
Please note the command must terminate with new line, otherwise the line is not
interpreted by tcsh (see bug #671003 for more details).
*** Bug 684785 has been marked as a duplicate of this bug. ***
Comment 3RHEL Program Management
2011-07-05 23:42:04 UTC
This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unfortunately unable to
address this request at this time. Red Hat invites you to
ask your support representative to propose this request, if
appropriate and relevant, in the next release of Red Hat
Enterprise Linux. If you would like it considered as an
exception in the current release, please ask your support
representative.
Technical note added. If any revisions are required, please edit the "Technical Notes" field
accordingly. All revisions will be proofread by the Engineering Content Services team.
New Contents:
Cause
User having tcsh login shell connects to CVS remote
server.
Consequence
CVS client uses rsh instead of SSH to reach server
becuase CVS_RSH environment is not set. If the server
has disabled rsh, then the connection cannot be
established. If the rsh is enabled, then sensitive
data can leak because rsh is not encrypted.
Fix
/etc/profile.d/cvs.csh has been adjusted to use valid csh
syntax to set CVS_RSH environment variable properly at
log-in.
Result
The CVS client will use SSH transport by default even if
user's login shell is tcsh.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
http://rhn.redhat.com/errata/RHBA-2012-1302.html