RE: CR II - winME? confirmation? (Slightly OT)

["Amer Karim" <amerk () telus net>]

<SNIP>
...Oh yeah,
and obviously a web server of some sort must be running, the worm propagates
by GET requests, which'll have no effect on a server that doesn't process
them...hard to see how anyone could be confused on this front...
<END SNIP>

My question was regarding only W2K systems.  However, you've raised the
point that's been bothering me throughout all this and the reason I raised
my second question - perhaps not clearly enough.  I've hesitated re-posting
my question, hoping that I'd be able to find the answer somewhere, or
someone here would have the answer.

Given the following configuration - W2K (any flavour) with default
installation of Index service (enabled or not) and ANY web server (not just
IIS) - are these possible hosts for the CR worm?  Or is it something in IIS
specifically that requires its presence?  From what I've gathered - both
from the discussion here and other sources such as MS, eEye, SARC etc. - it
was the original unchecked buffer in the idq.dll that was being used, and
IIS was necessary only as a conduit.  If this is the case, then ANY web
server should serve (pardon the pun) as that conduit.

Which brings me back to my question of why all the advisories are NOT
targeting ALL W2K users, instead of giving the impression that it's only
corporate servers that need worry.  And if ANY web server, not just IIS,
will suffice - then, I repeat my question with even more emphasis.

Regards,
Amer Karim
Nautilis Information Systems
e-mail: amerk () telus net, mamerk () hotmail com

-----Original Message-----
From: Jordan [mailto:jordanf () home com]
Sent: August 9, 2001 12:40
To: vuln-dev () securityfocus com
Subject: Re: CR II - winME? confirmation? (Slightly OT)

I've held off on posting about this for quite some time cause I thought it
would go away...but this topic seems to still be alive, so here goes.

Quoted from the wonderful analysis of the second version of Code Red by the
brilliant Eeye folks and Mr Levy.

"This worm, like the original Code Red worm, will only exploit Windows 2000
web servers because it overwrites EIP with a jmp that is only correct under
Windows 2000. Under NT4.0 etc... that offset is different so, the process
will simply crash instead of allowing the worm to infect the system and
spread."

Read this paragraph over and over and over again, and if you still have any
questions about whether it'll work on ME, NT4, OSX or any other operating
system, read it again. I'm amazed that no one's posted this yet...Oh yeah,
and obviously a web server of some sort must be running, the worm propagates
by GET requests, which'll have no effect on a server that doesn't process
them...hard to see how anyone could be confused on this front...

If we're talking strictly about exploiting an unchecked buffer in idq.dll,
that's one topic, and of course it's possible that it'll work on any system
with a vulnerable idq.dll, but if we're talking about a specific worm, say
CR2, then at least read the analysis before posting about it...

Jordan Frank
jordanf () home com