RE: .asp giving 404

["Calderon, Juan Carlos (GE, Corporate, consultant)" <juan.calderon () ge com>]

3 things on top of my mind

1. Your page is doing a "unaware" redirection to a non existing page, so
it is loaded, but then it redirects you (or transfer you, they are
different in ASP) and you get the 404 error massage
2. Antivirus is detecting and removing the shell or putting it on
quarantine (not likely if it is a web page)
3. IIS server is hardened and classic asp pages are "served" by 404.dll
a dll created by MS to prevent access to pages of certain type.

Hope it helps,
Juan C Calderon

-----Original Message-----
From: listbounce () securityfocus com [mailto:listbounce () securityfocus com]
On Behalf Of Robin Wood
Sent: Tuesday, April 12, 2011 12:00 PM
To: webappsec () securityfocus com
Subject: .asp giving 404

On a recent test I got FTP write access to a web server which had an ASP
based site on it. I uploaded an ASP shell and tried to browse to it but
got a 404. I uploaded it to a directory that had directory listing
enabled and confirmed the file was there but again browsing to it gave a
404.

I uploaded a text file and image and could browse to both of those fine.

I also tried downloading an existing page and modifying that then
re-uploading it but didn't have permission to overwrite the file.

I vaguely remember something to do with file permissions having to be
set correctly for ASP to run from years ago when I did some dev work in
it but can't remember. Can someone tell me what was likely to have been
going on and if there is any way around it given the access I had?

Robin



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