bugtraq - Re: Solaris telnet vulnberability

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Date: Tue, 13 Feb 2007 19:16:43 -0500
From: Joe Shamblin <wjs@...duke.edu>
To: Casper.Dik@....COM
Cc: Gadi Evron <ge@...uxbox.org>,
	Oliver Friedrichs <oliver_friedrichs@...antec.com>,
	bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk
Subject: Re: Solaris telnet vulnberability - how many on your network?

Casper.Dik@....COM wrote:
>> On Tue, 13 Feb 2007 Casper.Dik@....COM wrote:
>>>> On Tue, 13 Feb 2007 Casper.Dik@....COM wrote:
>>>>>> Am I missing something?  This vulnerability is close to 10 years old.
>>>>>> It was in one of the first versions of Solaris after Sun moved off of
>>>>>> the SunOS BSD platform and over to SysV.  It has specifically to do w=
>>>>>> ith
>>>>>> how arguments are processed via getopt() if I recall correctly.
>>>>> You're confused with AIX/Linux
>>>>>
>>>>> Solaris did not have the -f option in login until much later.
>>>> Hi Casper. While we have you here, any idea on when Sun will be patching
>>>> this issue?
>>> Now, follow the links from http://sunsolve.sun.com/tpatches
>>>
>>> Casper
>>>
>> Many thanks Casper! Can you give some more information on exactly what is
>> patched. Any Sun released advisory?
> 
> 
> The simplest possible fix on such short notice:
> 
> http://cvs.opensolaris.org/source/diff/onnv/onnv-gate/usr/src/cmd/cmd-inet/usr.sbin/in.telnetd.c?r2=3629&r1=2923
> 
> Casper


How about just uncommenting the following from /etc/default/login

# If CONSOLE is set, root can only login on that device.
# Comment this line out to allow remote login by root.
#
CONSOLE=/dev/console

Not a fix to be sure, but at least prevents a remote login.

Joe
-- 
Joe Shamblin                                    wjs@...duke.edu
Senior Systems Administrator             Department of Computer Science
(919) 660-6582                                  Duke University