Sql Injection - Are Parameters Enough To Protect You.
Feb 8, 2008
Hi all,
I have been learning .net and creating a public facing site. I am therefore worried about SQL injection.
My question is...
Is enclosing customer input inside .net SQLParameters enough to protect you from SQL injection?
If not why not?
I have seen people saying that SQLParameters alone is not enough but not an explanation why?
Can anyone help?
If I use code to remove words like drop or characters like '%' I'm limiting what my users can enter, but if I have to I will.
ta
C
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Jun 25, 2007
Hi,
Just read about SQL injection, and tested it out with sample database, and it does hack my database, the article show to prevent SQL injection by using application code to remove those keywords and change single quote to double quote, is there any method to prevent SQL injection directly using the database system itself, maybe stored procedure or anything?
Thanks.
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Oct 3, 2006
How to Protect From SQL Injection in ASP.NET and SQL 2005 for custom query expression?In my project, I allow user to custom query expression through UI, such asstring queryCondition=' sale>20 and sale <100'string queryCondition=' createDate>"10/10/2005"'string queryCondition='Fullname like "%Paul%" '...I construct SQL based the queryCondition string, such as string mysql='select * from mytable where '+queryConditionI know it's very dangerous because of SQL Injection, but it's very convenient for user to custom query expressionCould you tell me how to do? many thanks!
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Oct 25, 2007
Hello.
I have a report with parameter called "parm1", that gets a value of "true" or "false" depanding on another parameter.
When the report is runnig the parm1 value is "false".
How can I protect this parameter from a change by the user?
I mean - the user can run the report and then add to the url "¶m1 = true".
Can I do anything against that?
I tried marking it as "internal" and I thought that now it can get his value only from inside the report but it didn't worked.
Any ideas?
Thanks.
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Oct 25, 2007
Hello.
I have a report with parameter called "parm1", that gets a value of "true" or "false" depanding on another parameter.
When the report is runnig the parm1 value is "false".
How can I protect this parameter from a change by the user?
I mean - the user can run the report and then add to the url "¶m1 = true".
Can I do anything against that?
I tried marking it as "internal" and I thought that now it can get his value only from inside the report but it didn't worked.
Any ideas?
Thanks.
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Aug 7, 1999
My client maintains its HR data in an application that uses Oracle as its backend. This highly-sensitive data is basically off limits to all but a select few. Presently, I use a program in Access 97 that allows one high level HR person to pass their login to linked Oracle tables and copy a large chunk of this data to Access tables. From there I can morph it as needed for the Personnel, Safety, EEOC and other areas. The client sees this PW-protected, encrypted Access DB as safe because, being "only an Access DB", it falls below the radar of IS. This basically means IS can't get to the data. However, accessibility and scalability are non-existent. I'd like to reduce the Access DB to a shell that simply links to Oracle and SQL Server 7 tables and performs a straight pipe of the raw data between DBs. However, now IS will be very interested (since it's SQL 7) and have Admininstrator rights, therefore causing the HR people to squash the deal. How can I lock SQL 7 up so tight that IS can't get to the data and yet be able to maintain the DB? If this is not feasible, are there any other options that might provide a solution?
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Jan 22, 2008
Hi all, We have sql server 2000 on Windows server 2003.Is there anyway in sql server 2000 to protect some crucial data, even from the DBA. Thanks in advance...
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Mar 14, 2008
Dear Colleagues,
I have designed a Microsoft SQL Server 2005 database application using Visual Basic 2005. I want to control access to the database programmatically, without the End-User opening the database in SQL Server.
I want to protect the database structure such as my tables, code, etc. This restriction should include all the Administrators of the Computers on which my application will be deployed. Any modification of my database or code should be implemented only by me.
What is the best way to do this using (a) Windows Authentication Login? (b) SQL Server Login? How do I configure the User-Login?
NEW: In addition to above question, how best do I achieve this protection if installing the DB with other databases in an already existing server, is it possible to remove the Builtin Admin from the server role?? As in my case, there is no need for anyone else to open the DB in Management Studio at all as my VB application does all that is required.
Thanks and best regards,
Peter
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Sep 6, 2007
I want only SQL Server Authentication not Windows Authentication Because If some one copy database and attach at some other place using Windows Authentication then they can see each and everything.
I want something like Access (I know its password can be broken very easily)
I want to protect Table & SP Schema, Data is not much important.
Its urgent
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May 13, 2007
hello,
We wrote an erp,and provide a platform to participator to extend my erp system,so I will give my participator database dictionary,but I only want to give partial database dictionary,I will hide some table and some field, I want they cann't open the database thouth sql server management studio or other tools,only can using our interface to access database,how can I do?
-- I use sql server 2005
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Dec 13, 2006
I have a DB on my SQL Server Express 2005. In this db I have one table and I DON'T want any user can modify data on this table but I want only show this data (only select statements allowed). If I install this db on one of my customers' machine, I can see that he can modify data into this table If he log in into the database with windows authentication and not with the "USERLOGIN" that I have created with sql server authentication. What can I to to remove dbo access in Windows authentication in my db and "transfer" the dbo in another user access (like MYUSER with Sql Server authentication)?
Thank You
Mirko
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Jul 25, 2006
Dear All,
How is it possible to protect the Intellectual property for a integration / analysis project?
For instance if I build a complex solution €“ how do I avoid others to view and copy the solution.
Best Regards, T
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Jul 31, 2003
I have some tables in the employee database, this database created from sql sever 2000. I build a employee management application by C# and sqlserver 2000.
My goal is after design complete the empployee database by sqlserver 2000, any users can not modify my tables and unkonw table's structure.
help me please
thanks and reagards
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Jul 2, 2001
Hi Everybody:
We have a table which needs to be updated 2 million times per day. It hosts all real time transaction. There are 200K records in this table. Would you please to share your experience with me about how to protect/save such table in SQL 2000 from any possible damage?
We plan to use point-in-time backup (every 5 minutes). It still takes at half an hour to recover the whole database. Any new technology from Microsoft or SQL 2000 you can recommend?
Thank you very much.
Joan
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Apr 5, 2002
Hey!
This post contains the code for this thread: http://www.sqlteam.com/Forums/topic.asp?TOPIC_ID=14475
It deals with the problem how to prevent log actions in long running batch jobs from being rolled back. It was heavily inspired by Andy Pope´s approach to error handling (http://www.sqlteam.com/item.asp?ItemID=2290) and in fact you will see much of his code here.
The code:
This procedure dynamically opens a second connection in parallel to the existing connection of the calling procedure using SQL-DMO. So the second connection runs without the scope of transaction of the calling procedure. So no action you take here is rolled back in case the calling proc fails. So be careful! Keeping data integrity is your job here and you could do many weird things to your database.
The procedure dynamically adds a user function that if called just would return the object token of the new DMO connection. So any piece of code in the same batch could reuse the exisiting connection.
LogConstructor
CREATE PROCEDURE LogConstructor AS
if exists (select * from sysobjects where id = object_id (N'dbo.MFF_GetLogObject')
and OBJECTPROPERTY(id, N'IsScalarFunction') = 1)
drop function dbo.MFF_GetLogObject
DECLARE @Error INT
DECLARE @ErrorMsg VARCHAR(255)
DECLARE @oSQLServer INTEGER
DECLARE @Source VARCHAR(255)
DECLARE @Return INTEGER
declare @dynsql nvarchar(3000)
-- Create the SQLServer object
EXEC @Error = sp_OACreate 'SQLDMO.SQLServer', @oSQLServer OUT
IF @Error <> 0
GOTO OA_Error
-- Set the login process to use NT Authentication
EXEC @Error = sp_OASetProperty @oSQLServer, 'LoginSecure', -1
IF @Error <> 0
GOTO OA_Error
-- Connect to server using NT Authentication
EXEC @Error = sp_OAMethod @oSQLServer, 'Connect', NULL, @@SERVERNAME
IF @Error <> 0
GOTO OA_Error
-- Verify the connection
EXEC @Error = sp_OAMethod @oSQLServer, 'VerifyConnection', @Return OUTPUT
IF @Error <> 0
GOTO OA_Error
IF @Return = 0
GOTO OA_Error
-- Create Function with server object
select @dynsql = N'CREATE Function MFF_GetLogObject () RETURNS INT AS BEGIN RETURN ' + cast(@oSQLServer as varchar) + N' END'
EXEC sp_executesql @dynsql
return
OA_Error:
-- Get the error text
EXEC sp_OAGetErrorInfo @oSQLServer, @Source OUT, @ErrorMsg OUT
SELECT
@ErrorMsg = CONVERT(CHAR(16), @Error) + ': ' + @ErrorMsg + ' (Source: ' + @Source + ')'
print @ErrorMsg
return
GO
The next procedure just drops the DMO connection and also drops the user function as the token is invalid by now. This proc should be called within the same batch as the constructor to clean things up properly.
LogDestructor
CREATE PROCEDURE MFP_LogDestructor AS
declare @lo int
select @lo = dbo.MFF_GetLogObject()
exec sp_OADestroy @lo
if exists (select * from sysobjects where id = object_id(N'dbo.MFF_GetLogObject')
and OBJECTPROPERTY(id, N'IsScalarFunction') = 1)
drop function dbo.MFF_GetLogObject
GO
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Jul 23, 2005
Hello,How to protect structures(Tables,SP,Views and Functions) of a SQLServer Database?(Password protect a database file)I have a SQL database that will distribute with my application, I wantto protects it's structure from my appliction users. Only myapplication can access the database.Thanks
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Apr 16, 2007
I have developed a small desktop application using c# and Ms Access 2002. Database is password protected and contains sensitive data. As many password retrieval tools are available, What should I do to protect Ms-Access (.MDB ) file? Is there any way through which I can hide database file
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Jun 22, 2006
Hi, i want to know if its posible to create credentials or certificates in order to protect a SQL 2005 data base.
Because if someone Buckups one of my DBs from my server, and try to restore it in orther server i dont want they to see my DB information because he dont have the correct credentials or certificates for it.
This is posible?. if is, How i do it ?
Best Regards.
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Jun 25, 2007
I got a problem concerning encryption. The thing is I have decided to use symmetric key protected by certificate to encrypt certain information. Certificates are protected by database masterkey and by service key.
But I also want to be sure that if someone steals my database with all its data he wont be able to decrypt it with his own SQL Server Management Studio where he has all the permissions.
Also after some time I will need to take my database and set it up on another PC.
Has anyone ideas how to solve this??
P.S. As far as I know if symmetric key is protected by certificate which is protected by DB master key and service master key then you cant decrypt data if database is moved to another workstation and opened with another Management Studio. Please can anyone explain how this works( if its true). And if this is true then how can i move my DB without loosing access to encrypted data???
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May 31, 2006
Panos writes "I am working with SQL Server 2005 Express Edition. How can I protect mdf files from being transfered (attached) and be used to another SQL server in another machine?
Thanks
Panos"
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Nov 1, 2015
I am exporting the data from database to an excel template that will have 100+ columns and approx 4000 rows of data. Then the business user will make changes to some columns without modifying primary key columns and will send back to us where we will update the same to database.
In order to this am using an excel template by protecting the primary key columns with a password protection.
At template level am fine and whenever am trying to modify any primary key column it's not allowing and am totally good there. But when I use that excel template as a destination to load data from SSIS, all the protected columns are no longer protected and i could able to make changes.
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May 18, 2008
I have a problem protecting a SQL 2005 SP2 server on Windows Server 2008 (64bit), running DPM 2007 on Windows Server 2003 (32 bit).
The following SQLVDI event ID 1 is logged in the event viewer:
SQLVDI: Loc=SVDS:pen. Desc=BADMEM. ErrorCode=(-1). Process=2972. Thread=6504. Server. Instance=MSSQLSERVER. VD=Global{CC60D260-C5DD-406A-9E63-64A9503A9763}1_SQLVDIMemoryName_0.
The UUID changes each time the event is logged, but the first event is followed by:
SQLVDI: Loc=SVDS::Cleanup. Desc=Close(channel). ErrorCode=(6)The handle is invalid.
. Process=2972. Thread=6504. Server. Instance=MSSQLSERVER. VD=Global{CC60D260-C5DD-406A-9E63-64A9503A9763}1_SQLVDIMemoryName_0.
Then this is repeated twice:
SQLVDI: Loc=SVDS::Cleanup. Desc=Close(channel). ErrorCode=(6)The handle is invalid.
. Process=2972. Thread=6504. Server. Instance=MSSQLSERVER. VD=.
Event ID 3201 is then logged by MSSQLSERVER:
Cannot open backup device '{CC60D260-C5DD-406A-9E63-64A9503A9763}1'. Operating system error 0x80770006(error not found).
This is followed by Event ID 3041:
BACKUP failed to complete the command BACKUP DATABASE CommunityServer. Check the backup application log for detailed messages.
It looks to me like the virtual device creation fails in the first step, the next three event messages are the cleanup of the failed virtual device, and the final two messages are the failed SQL backup as the expected device doesn't exist.
My question is why? The message seems to indicate bad memory, but I'm sure the physical memory is good - The 16GB in this server has been tested extensively, and I have no other issues. Perhaps its some sort of memory allocation error?
I'm going to apply cumulative update 7 to this SQL server to see if it makes a change. What's the latestest version of sqlvdi.dll available?
TIA,
Karl.
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Aug 17, 2006
We have a commercial VB.NET winforms client/server application that utilizes SQL Server 2005 express edition. The schema and data that the application utilizes is proprietary and could be very damaging if it got into a competitors hands.
Is there any way to protect the data and schema of a sql server 2005 express edition database?
Will this functionality ever be added?
Thanks
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Jul 4, 2006
This is my code:
CommandText = "SELECT * FROM Products"
If textboxStockID.Text.Length > 0 Then
CommandText = CommandText & " where [StockID] like '%" & textboxStockID.Text & "%'"
End If
Is this subject to the sql injection bug... if so, what changes do I need to make?
Canning
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Nov 25, 2007
What is the best way to avoid SQL injection?I know not to do stuff in Visual Basic such as...
Dim objCmd As New SqlCommand("SELECT * FROM mytable where id ='" & Request.QueryString("id") & '" , objConn)As it's best to use stored proceduresIs there any other problems you guys might have had happen to you or other possibilites for attackers that I should know about? Cheers
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Jun 5, 2008
I manage a VBSript/ASP/IIS/SQL website for a nonprofit, and our website has been hacked by SQL injections. I have changed the code on the website so it can't access the database, cleaned the database, backed up the database, but now need to find a way to tighten up the security so it won't happen again.
We're a non-profit- so the server is Windows 2000 Terminal SP4 (yeah, I know, it's old, bear with me).
I was using the following code to access the database from the website:
dbconn.open "DSN=cptigers;UID=sqlwebaccess;Password=password" (where cptigers is the name of the DSN connection with SQL server authentication).
So far, I've removed read permission in IIS on the include file that I use to open the database. I've changed the data source to use Windows NT authentication, and set the SQL login MDBCA/cptigers (this is the IIS login) to have public and db_denydatawriter roles.
But I'm not sure how to call this database connection in the code (how do you define the IIS user and password?), and not sure if this is sufficient to protect from future SQL injections.
Am I heading the right direction? Thanks, Amanda
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Jun 16, 2005
Hi All:I can't seem to get this thing work... When I type this in a textbox : '; exec master.dbo.sp_addsrvrolemember 'redice','sysadmin' -- , there's no respond, I mean, I check redice's role, but the System Administrators is not checked.Any idea about this?Thanks in advance.
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Jul 21, 2005
Hi All,
First explain the SQL Injection and how it working and second what is the Solution of SQL Injection..... ?
Thanx,
Shally
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Aug 14, 2004
Hi there !
Can anyone put some more lights on SQL Injection ? Is there anyway to get rid of it ? If yes then please let me know ?
With Thanks !
sqlboy
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Jan 30, 2006
Does anyone have any insight regarding SQL injection involving a table name t_jiaozhu? Is this a new hack script or old? I am having a hard time finding any clear details other than ways to stop injection from happening. This I know, what I am trying to figure out is what damaged may have been caused (worse case) and what would be a good plan of attack to figure out what steps suceeded/failed.
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Mar 25, 2008
I have a windows 2003 server with SQL Express 2005. The server has about 15 websites and uses ASP
Hackers somehow are creating NT Administrator Users on the server and then logging in with Terminal Services.
I ran thru SQL injection and tried to stop these attacks by stopping keywords in the SQL, but they still happen
Can anyone help, I really cant afford to pay for a security analyst so any advice would be nice.
How are these guys creating users?
thanks
Nick
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Mar 13, 2008
Hi there. I use MS Enterprise library to get access to my MSSQL database. All actions are performed by stored procedures. Should I check the input parameters for "bad" symbols such as ' or union words or the library do all this for me? Thanks.
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Nov 21, 2006
What is SQL Injection? Can any body explain it briefly?
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