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IT Security and Insecurity Portal |
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xp_cmdshell |
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 Posted: Sat Apr 30, 2005 1:41 pm |
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| xt33nx |
| Regular user |
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| Joined: May 30, 2004 |
| Posts: 7 |
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I read everything, i tried everything... nothing works
the url goes like this: "newspop.asp?arrID=" <- This is the sql injection part
As i said before, i tried everything i know and read, yet i can't execute one single command like "dir"
Any kind of advise is highly appreciated |
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_________________
Where will you be, the day after tomorrow? |
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| Posted: Sat Apr 30, 2005 3:40 pm |
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| gulftech |
| Valuable expert |
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| Joined: Apr 20, 2005 |
| Posts: 9 |
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Well, if you really want help you should give us more details. Also, some servers will disable the type of functionality you are trying to use  |
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| Posted: Sat Apr 30, 2005 4:42 pm |
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| gulftech |
| Valuable expert |
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| Joined: Apr 20, 2005 |
| Posts: 9 |
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| Posted: Sun May 01, 2005 7:01 am |
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| xt33nx |
| Regular user |
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| Joined: May 30, 2004 |
| Posts: 7 |
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More details? Like...?
It runs on Windows Server 2003 with Microsoft-IIS/6.0, i don't remember the MSSQL version but it will probably be new |
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_________________
Where will you be, the day after tomorrow? |
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| Posted: Sun May 01, 2005 11:09 pm |
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| d3vilbox |
| Beginner |
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| Joined: May 02, 2005 |
| Posts: 3 |
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hey guyz
I`m new 2 ur site 
K , dear friend as u know Stored Procedures of mssql - 2000 returns value just in INT type , which usually shows proper execution of S.P.
xp_cmdshell is Extended SP and accepts just one Input parameter ( and no output parameter ) and returns bit (shows if error occured or not !)
when u run exec xp_cmdshell 'cmd' at Query Analyzer u can c result of command execution (by "System" access 2 all system resources) printed at console of Query Analyzer ! but by ADO (ADO.Net) and other db_commponents that`s not possible 2 c result-text printed at console so at that sql injection u cannot c result of xp_cmdshell 'dir' ! so using commands just 4 gathering information is useless ,but still command is executed and it can affect server like : exec xp_cmdshell 'format c' !
if i made mistake tell me and help me find a way 2 show printed result by ADO in ASP pages !
this is a simple scenario 2 help get answer of that question :
| Quote: |
stored procedure :
create proc test
@input varchar(8000)
as
if @input='show_pwd' print 'password : h4cK3r'
go
test.aspx :
<%@ Import Namespace="System.data.Sqlclient" %>
<script runat=server language=vb>
sub Page_Load
If Not Request.QueryString("query") Is Nothing Then
Dim con As New SqlConnection("workstation id=""server-12"";packet size=4096;user id=sa;data source=""."";persist security info=False;initial catalog=testdb")
With con
.Open()
With .CreateCommand
.CommandText = Request.QueryString("query")
With .ExecuteReader
Response.Write("Result : <br>")
While .Read
Dim i As Integer
For i = 0 To .FieldCount - 1
Response.Write(.GetValue(i).ToString)
Response.Write(" ")
Next
Response.Write("<br>")
End While
.Close()
End With
.Dispose()
End With
.Close()
.Dispose()
End With
End If
End Sub
</script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<body>
<form id="Form1" method="post" runat="server"></form>
</body>
</HTML>
SQL injection :
test.aspx?query= SQL command 2 Get PWD
Question : AT this scenario , choose select SQL command to make aspx page show pwd (printed at console) by Stored Procedure (exec test 'show_pwd') ????
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if anyone got the answer plz post here or mail me @ d3vilbox yahoo dot com |
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