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Re: IIS : access to cmd.exe and multiple commands on one line
From: Thor () HammerofGod com
Date: Wed, 24 Oct 2001 10:28:08 -0700

Have you just tried the "+" sign instead of the "&"?  That works too.
AD


----- Original Message -----
From: "Daniel Polombo" <polombo () cartel-info fr>
To: <pen-test () securityfocus com>
Sent: Wednesday, October 24, 2001 6:37 AM
Subject: Re: IIS : access to cmd.exe and multiple commands on one line


Rainer Duffner wrote:


That may well be the case.
It gets changed during service-packs and hotfix updates.
Also, the perl-manual mentions something in the direction of "some
functionality crept in...".

Anyway, as another poster mentioned, the whole commandline-tools are not
consistent - and thus not usable beyond simple "batch-files".

Actually, I believe Ivy Lane hit the nail on the head. The '&' is
interpreted
by IIS as a CGI parameter separator, and something in the syntax irks the
server, which returns an invalid parameter error. This is a CGI error, and
not
a cmd.exe error. I didn't see that immediately because I'm parsing the
errors
to extract only certain parts of the returned HTML page.

Therefore I am now trying to find a way to pass a '&' to the cmd.exe
without
it being interpreted first by the webserver. Hex- or unicode-encoding it
is
useless, since IIS will always expand those characters before actually
treating the request.

Is there some kind of escaping sequence for an URL? RFC 1738 (URL) only
states
that '&' is a reserved character, and that %-encoding them should modify
the
behaviour of the webserver (ie, that the URL would be actually interpreted
differently with and without %-encoding for a reserved character like
'&'),
but it doesn't appear to modify IIS' behaviour.

Perhaps there are some IIS-specific niceties here as well?


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