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Re: ISS Internet Scanner Brute Force Bug

daemon@ATHENA.MIT.EDU (David LeBlanc)
Fri Feb 19 20:25:32 1999

Date: 	Fri, 19 Feb 1999 09:52:20 -0500
Reply-To: David LeBlanc <dleblanc@MINDSPRING.COM>
From: David LeBlanc <dleblanc@MINDSPRING.COM>
X-To:         Stephen Bishop <sbishop@idsec.co.uk>
To: BUGTRAQ@NETSPACE.ORG
In-Reply-To:  <000501be5bf1$2f65cfc0$1101a8c0@slate.idsec.co.uk>

At 10:18 AM 2/19/99 -0000, Stephen Bishop wrote:
>David,

>> I'd suggest that you use vi, notepad, or some reasonable
>> text editor in the meantime.  Just what text editor are you using?

>At the risk of getting off the subject, I've come across many situations
where
>having the last line in a file without a line terminator has caused problems,
>so I think software should always be written to handle this situation. And
>even Emacs (which, otherwise, solves all life's problems) allows me to create
>a file with no line terminator at the end.

I agree.  I thought the same thing when I fixed this a long time ago.  I
looked at the code last night, and it looks like it is handling this
situation just fine.  Since the bug does appear to be in recent builds
(somehow), the work-around would be to place either a blank line or a
comment (start the line with #) as the last line.  Or simply hit the enter
key at the end of each line.

My version of vi does not allow this, hmmm - checking a few others...

Here's what I've found:
Terminates all lines:
vi (Congruent GNU port from ftp.cc.utexas - actually elvis)
Word
Wordpad
edit
edlin (and adds a ^Z)

Does NOT terminate:
notepad
copy con [file]
VC++ text editor

<joke> Moral of story - always use vi, and life is good 8-)

BTW, as a pre-emptive strike against this one, there _is_ a bug in the NT
scanner where we're not handling LF-delimited files properly.  If you
happen to have created your user-password pairs under UNIX, run tr on the
file before using it in the scanner.  Alternately, open it in Word and save
it back out. Notepad will NOT help - it doesn't deal with LF-delimited
files correctly either.  NT's version of perl also makes this easy -
running the following script does it:

while(<>){print;}


David LeBlanc
dleblanc@mindspring.com

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