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Conference powdml::pc_security

Title:	PERSONAL COMPUTER SECURITY
Notice:	SWEEP servers Note 5; more info on www-is-security.mso.dec.com
Moderator:	BSS::BOREN

Created:	Wed Jan 02 1991
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	504
Total number of notes:	2905

492.0. "New Exchange project seems to download a trojan horse.." by FIEVEL::FILGATE (Bruce Filgate SHR3-2/W4 237-6452) Fri Mar 21 1997 15:46

 Late one night as I finished upgrading my office pc to Office 97, I
 decided to go for broke and bring up my OutLook mail box.  Well, I
 logged onto the DIGITAL1 domain ok, but our mailbox/server was off to
 one side so I logged into that domain when requested, where I received
 a surprise download.

 As I understand the explaination of what loaded next, it is required
 of all users that have exchange mailboxes.  This appears to be a 
 MS product with a name like SMS (system management software or such?).
 It appears that when the domain login is in progress from a PC with
 exchange installed, the PC is queried for its hardware/software/license
 inventory which is uploaded, if the upload fails, then the domain 
 server loads the SMS package.  The MS documentation suggests that
 the software is used by remote administrators to enter console commands
 as if the remote individual were sitting in front of the PC.

 Given that DEC used to hold the owner/operator responsible for security on
 their computers, and given that this software at first blush bypasses
 system security, was there a modification in the corporate security
 rules for PCs that I missed?

 How are other users dealing with this new wrinkle and protential 
 security hole?

 And mostly, where can we get more documentation on this software that
 we now have installed on our machines? (I usually read at least the
 release notes!)

 Bruce

T.R	Title	User	Personal Name	Date	Lines
492.1	I'd also like to turn off Big Brother	KYOSS1::POLAKOWSKI	One of Us is Over 40	`Mon Mar 24 1997 07:53`	11
	I too would like to find oout how to disable this "feature". I don't like watching the logon process executing Xcopys and time synching and such without knowing what the hell is going on. I'd just as soon have them leave their hands off my PC. If I want to set the time or copy something i'd prefer to do it on my own terms apart from some Big Brother entity. Ken
492.2		TARKIN::LIN	Bill Lin	`Mon Mar 24 1997 08:39`	4
	You have to negotiate this with your IS department. CCS does not want to play "Big Brother." Talk to CCS if you have concerns. /Bill
492.3	I was told no	WHYNOW::NEWMAN	Protector of the Cause	`Mon Mar 24 1997 11:24`	2
	I have tried to get this "turned off" and was told that it was a "corporate policy" and could not be eliminated...
492.4	SMS is not the problem, it does exercise a Microsoft security liability though	FIEVEL::FILGATE	Bruce Filgate SHR3-2/W4 237-6452	`Mon Mar 24 1997 12:57`	24
	Consider, if you will, that SMS gets installed by utilizing a very large security hole that Microsoft created. Some folks probably remember that DEC did a similar thing in the earlier days of VMS, networks `task' object; once this vulnerability became known to the hackers, no VMS system was safe until we fully locked down the `task' object on each and every machine. If a corporate entity can push a copy of software onto a PC and make it run, any other entity can do the same thing. A case in point is those of us who read mail at home: these home machines could be spoon fed trojan horse class programs from any ISP. The trap door that opens this vulnerability needs a way to be locked, presumably there is some software to lock it down? Perhaps in SMS? SMS's only security crime in this is that it makes the DEC PC network monolithic down, a break-in on one layer of the SMS management lays to immediate risk every PC located below the break-in...not good for bet-your-business computing. Probably time for a good vaccination! Bruce
492.5		WOOK::ogodhcp-123-40-215.ogo.dec.com::read	Bob Read @OGO, DTN 276-9715	`Tue Mar 25 1997 12:09`	10
	SMS utilises the NT logon batch file to do its thing. This is hardly something that anyone other than your authentication domain administrator can access. As long as your tier 1 authentication domain (for those of us using CCS, that's Digital1, Digital2, or Digital3) is not compromised, then you're probably safe. As for SMS' ability to "control" your PC, that requires loading and enabling the remote access bits to allow access. It's not loaded or enabled by default, so your machine is safe from remote control unless you go in and turn it on. That requires explicit action on your part.
492.6	Some paranoia is healthy.	FIEVEL::FILGATE	Bruce Filgate SHR3-2/W4 237-6452	`Tue Mar 25 1997 17:48`	26
	>>As for SMS' ability to "control" your PC, that requires loading and >>enabling the remote access bits to allow access. That is what I was told as well, but when I ran SMS and looked at the settings, all the boxes appeared to checked to enable them by default. I will not pretend to understand SMS even a little bit, but it appears from the MS web page and the set up pages on my PC to be fully enabled. As to "tier 1 authentication domain...is not compromised", this is not my area of expertise which is why I do not run with domain login on my engineering PC. Maybe this is a topic that should be very well addressed in either the exchange class or a recommended follow on? Perhaps if there were more information available there would be less (or more?) concern about SMS. Also a security advisory about the future up loads of SMS would have gone a long way to asuage anxiety about getting something `squirted' into my machine when logging on to read mail...pulling the power plug was tough on the write-back disk cache. Perhaps we should not be concerned, but I'm an engineer and as an engineer I will always want to have/see the data. Bruce