The document discusses SQL injection, which occurs when malicious SQL commands are injected into a backend database. It provides examples of how SQL injection can be used to bypass authentication or retrieve sensitive data from a database. The document then discusses various techniques for preventing SQL injection, including using stored procedures, parameterized queries, and object-relational mappers like Entity Framework and NHibernate which help protect against injection attacks.
SQL injection is a code injection technique, used to attack data-driven applications,
in which malicious SQL statements are inserted into an entry field for execution.
This is a method to attack web applications that have a data repository.The
attacker would send a specially crafted SQL statement that is designed to cause
some malicious action.SQL injection is an attack technique that exploits a security
vulnerability occurring in the database layer of an application and a service. This
is most often found within web pages with dynamic content.
SQL injection is a code injection technique, used to attack data-driven applications,
in which malicious SQL statements are inserted into an entry field for execution.
This is a method to attack web applications that have a data repository.The
attacker would send a specially crafted SQL statement that is designed to cause
some malicious action.SQL injection is an attack technique that exploits a security
vulnerability occurring in the database layer of an application and a service. This
is most often found within web pages with dynamic content.
The slide consists of:
An explanation for SQL injections.
First order and second order SQL injections.
Methods: Normal and Blind SQL injections with examples.
Examples: Injection using true/false, drop table and update table commands.
Prevention using dynamic embedded SQL queries.
Conclusion and References.
SQL Injection is a dangerous vulnerability. The transformation from a normal SQL to a malicious query. The successful SQL injection attack can lead to unauthorized access, change or delete data, and theft of information. Do not take SQL injection for granted.
SQL injection is a code injection technique, used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker).
SQL injection is a code injection technique that might destroy your database.
SQL injection is one of the most common web hacking techniques.
SQL injection is the placement of malicious code in SQL statements, via web page input.
• What is SQL injection ?
• Why is it harmful?
• Types of SQL injection attacks.
• How to identify SQL injection vulnerability.
• Exploiting SQL injection.
• How to protect Web Application from SQL injection.
SQL injection is a type of security exploit in which the attacker adds SQL statements through a web application's input fields or hidden parameters to gain access to resources or make changes to data.
Unethical access to website’s databases hacking using sql injectionSatyajit Mukherjee
This presentation is prepared by Mr. Satyajit Mukherjee, Senior Consultant of IBM. This will provide the user a brief understanding of unethical hacking and SQL Injection.
This presentation was given at the November 2012 chapter meeting of the Memphis ISSA. In the presentation, I discuss various methods of exploiting common SQL Injection vulnerabilities, as well as present a specialized technique known as Time-Based Blind SQL Injection. Related to the latter, I give a scenario in which other common forms of SQL Injection would fail to produce results for a penetration tester or attacker, and show how one may overcome this situation by using the specialized technique. The scenario given, along with the sample code, is NOT a contrived example, but instead is closely based on a real-world application that I encountered as part of an assessment.
A live demonstration of the common forms of SQL Injection was also given which utilized the OWASP Broken Web Apps VM, DVWA, Burp Proxy and SQL Power Injector. To demo a real-world time-based blind injection, I created and locally hosted a new application which closely mimicked the real-world application mentioned above.
In this presentation I covered almost all basic details about SQL Injection. So you can get best knowledge about SQL Injection (SQLI).
This presentation contains animation so try out it on PC's.
Show the reader the potential damage that a SQL injection vulnerability can make. Show evading techniques to some filters. Show some common mistakes that the programmers make when protecting their sites. Show the best practices to protect your code.
The slide consists of:
An explanation for SQL injections.
First order and second order SQL injections.
Methods: Normal and Blind SQL injections with examples.
Examples: Injection using true/false, drop table and update table commands.
Prevention using dynamic embedded SQL queries.
Conclusion and References.
SQL Injection is a dangerous vulnerability. The transformation from a normal SQL to a malicious query. The successful SQL injection attack can lead to unauthorized access, change or delete data, and theft of information. Do not take SQL injection for granted.
SQL injection is a code injection technique, used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker).
SQL injection is a code injection technique that might destroy your database.
SQL injection is one of the most common web hacking techniques.
SQL injection is the placement of malicious code in SQL statements, via web page input.
• What is SQL injection ?
• Why is it harmful?
• Types of SQL injection attacks.
• How to identify SQL injection vulnerability.
• Exploiting SQL injection.
• How to protect Web Application from SQL injection.
SQL injection is a type of security exploit in which the attacker adds SQL statements through a web application's input fields or hidden parameters to gain access to resources or make changes to data.
Unethical access to website’s databases hacking using sql injectionSatyajit Mukherjee
This presentation is prepared by Mr. Satyajit Mukherjee, Senior Consultant of IBM. This will provide the user a brief understanding of unethical hacking and SQL Injection.
This presentation was given at the November 2012 chapter meeting of the Memphis ISSA. In the presentation, I discuss various methods of exploiting common SQL Injection vulnerabilities, as well as present a specialized technique known as Time-Based Blind SQL Injection. Related to the latter, I give a scenario in which other common forms of SQL Injection would fail to produce results for a penetration tester or attacker, and show how one may overcome this situation by using the specialized technique. The scenario given, along with the sample code, is NOT a contrived example, but instead is closely based on a real-world application that I encountered as part of an assessment.
A live demonstration of the common forms of SQL Injection was also given which utilized the OWASP Broken Web Apps VM, DVWA, Burp Proxy and SQL Power Injector. To demo a real-world time-based blind injection, I created and locally hosted a new application which closely mimicked the real-world application mentioned above.
In this presentation I covered almost all basic details about SQL Injection. So you can get best knowledge about SQL Injection (SQLI).
This presentation contains animation so try out it on PC's.
Show the reader the potential damage that a SQL injection vulnerability can make. Show evading techniques to some filters. Show some common mistakes that the programmers make when protecting their sites. Show the best practices to protect your code.
Mike Creuzer's presentation from the December, 2009 Suburban Chicago PHP & Web Dev Meetup. The topic is SQL injection in PHP and common PHP content management systems.
Visit Mike's blog at http://mike.creuzer.com/
This presentation aims to teach the concept of SQL Injection and illustrate in practical examples how such an attack can damage a system.
Examples in Python
Esta apresentação objetiva ensinar o conceito de SQL Injection, bem como ilustrar em exemplos práticos como um ataque desse tipo pode danificar um sistema.
Exemplos em Python.
What they are, steps you can take to prevent them, a brief overview.
3/13/2013 winter term 2013 at Portland State University for the Introduction to Databases class.
Presented by Stacy Watts and Tyler Fetters
Using Rails to Create an Enterprise App: A Real-Life Case StudyDavid Keener
Rails is a great framework for quickly creating "green field" web applications. Find out how well it works when creating internal, corporate web applications that have to access multiple legacy databases.
This article describe entity framework code first migration steps in a simple way .Code first migrations commands and how to deployed to the Azure cloud .
The outline of the presentation (presented at NDC 2011, Oslo, Norway):
- Short summary of OData evolution and current state
- Quick presentation of tools used to build and test OData services and clients (Visual Studio, LinqPad, Fiddler)
- Definition of canonical REST service, conformance of DataService-based implementation
- Updateable OData services
- Sharing single conceptual data model between databases from different vendors
- OData services without Entity Framework (NHibernate, custom data provider)
- Practical tips (logging, WCF binding, deployment)
ADO.NET by ASP.NET Development Company in india
ADO.NET is a data access technology from the Microsoft .NET Framework that provides communication between relational and non-relational systems through a common set of components.
Video :
Courtesy:
http://www.ifourtechnolab.com
TechEd Africa 2011 - OFC308: SharePoint Security in an Insecure World: Unders...Michael Noel
One of the biggest advantage of using SharePoint as a Document Management and collaboration environment is that a robust security and permissions structure is built-in to the application itself. Authenticating and authorizing users is a fairly straightforward task, and administration of security permissions is simplified. Too often, however, security for SharePoint stops there, and organizations don’t pay enough attention to all of the other considerations that are part of a SharePoint Security stack, and more often than not don’t properly build them into a deployment. This includes such diverse categories including Edge, Transport, Infrastructure, Data, and Rights Management Security, all areas that are often neglected but are nonetheless extremely important. This session discusses the entire stack of Security within SharePoint, from best practices around managing permissions and ACLs to comply with Role Based Access Control, to techniques to secure inbound access to externally-facing SharePoint sites. The session is designed to be comprehensive, and includes all major security topics in SharePoint and a discussion of various real-world designs that are built to be secure. • Understand how to use native technologies to secure all layers of a SharePoint environment, including Data, Transport, Infrastructure, Edge, and Rights Management. • Examine tools and technologies that can help secure SharePoint, including AD Rights Management Services, Forefront Unified Access Gateway, SQL Transparent Data Encryption, and more. • Understand a Role-Based Access Control (RBAC) permissions model and how it can be used to gain better control over authorization and access control to SharePoint files and data
Similar to Sql Injection and Entity Frameworks (20)
2. Intro to SQL Injection…
Many web pages communicate directly to a backend database for
processing.
For example, a username and password is asked for on the Web
page and the web page will pass it to the database to validate the
information.
Some applications will not validate the field adequately before
passing it to the database, and the database will process whatever it
will receive.
Hackers will pass SQL commands directly to the database, and in
some cases tables like “passwords” are returned because the SQL
commands are not being filtered adequately.
SQL may return errors in the web page that even lists the correct
tables to query so that the hacker may make more accurate
attempts to get data.
3. SQL Injection
SQL Injection is the ability to inject malicious SQL commands
into the backend code.
For example:
SELECT * FROM users WHERE username = ‘USRTEXT ' AND
password = ‘PASSTEXT’
Passing ' OR 1=1-- in the USRTEXT field generates:
SELECT * FROM users WHERE username = ‘’ OR 1=1 -- ' AND
password = ‘PASSTEXT’
The OR 1=1 returns true and the rest is commented out
6. Types of SQL Injection…
There are really two types of SQL injection, “Blind” SQL Injection
and “Directed” SQL Injection.
Blind SQL Injection is performed when a hacker passes SQL
commands into the web form and generic errors are returned to
the user, for instance a “404” Error page or page not found. The
hacker has to make more extensive guesses on the database behind
the web server.
Directed SQL Injection is when the web server returns SQL errors
to the user that give information about the table that has issue
processing the SQL command. Some web pages may return
“users.password table incorrect SQL query”, which gives the hacker
the name of the database to launch the attack against.
7. Common attack strings
‘ or 27(hex) – delineates SQL string values.
“ or 22 (hex) – also delineates SQL string values.
; or 3B (hex) - terminates statements.
# or 23(hex) - also terminates a statement. (Access DB)
/* or 2F2A (hex) - comment delimiter.
-- or 2D2D (hex) – also comment delimiter.
( or 28 (hex) or ) or 29 (hex) – logical sub clauses.
{ or 7B (hex) or } or 7D (hex) – terminates a question.
exec – used to call MS-SQL stored procedures.
union – a SQL command very common to SQL injection.
9. HackmeBooks SQL Injection
(attacking)
HSQL DB, uses a SHUTDOWN to shut down the database, since
the SEARCH field uses straight SQL commands, typing in
‘;+SHUTDOWN;-- will add ‘%’; SHUTDOWN; --%’ in the SQL
statement, thus shutting down the database:
Session is now closed because we shutdown the database:
10. Real life example
Start by identifying the SQL Server version, table name and fields
in the error page:
We see that it is SQL Server, and an “id” field into the
“business.dbo.urltracking” table. An Attacker can now try
inserting into the table.
11. Common fixes to SQL Injection…
SQL Injection is caused by “Dynamic SQL” with unconstrained
validation.
Constrain the validation to not pass SQL commands to Dynamic
SQL.
Use Stored Procedures.
Use Parameterized, or Prepared statements.
Use newer technology frameworks that are built using
Parameterized statements like NHibernate and Spring.NET.
Use the ADO.NET Entity framework.
12. Stored Procedures
A stored procedure is a precompiled subroutine that is stored in
the data dictionary for use of applications accessing the SQL
Server.
A sample stored procedure for exec sp_GetInventory ‘FL’ :
13. Hacking Stored Procedures
Stored procedures can be just as dangerous as SQL Injection, if not
properly configured.
One the most dangerous Stored Procs in SQL Server is the default
xp_cmd_shell.
If you have admin permissions with SQL server, you can try this
simple example: exec master..xp_cmdshell ‘dir c:’
Extending this feature, dynamic SQL may allow, in the username
form : MyUsername; exec xp_cmdshell '"echo open 192.168.10.12"
>> c:hack.txt’;
See
http://www.informit.com/articles/article.aspx?p=30124&seqNum
=3 for an example attack.
15. Entity Framework
With the ADO.NET Entity Framework, Visual Studio can be used
to create Entity Relationship Models (ERM) in order to create a
database.
Entity Framework is part of .NET 4 and is often referred to as EF4.
21. Customize the code generated by the Entity Designer with
T4 (.tt) templates
T4 is the Text Template Transformation Toolkit.
T4 is a means for creating code generated artifacts.
T4 will generate a .tt file which looks like ASP classic syntax with
the brackets.
The .tt file is the Text Template file that will generate the
background C# code from the Entity Model.
Click on the model .edmx file and select “Add Code Generation
File…”
22. Use a T4 Editor to highlight code
VS 2010 does not come with a T4 Visual Editor, so a plugin needs to
be installed to offer IntelliSense.
For VS 2010, I use the plugin at http://t4-editor.tangible-
engineering.com
To
23. T4 Editor
The .tt is just the template to generate the underlying .cs (C#) file:
24. PEM
Microsoft’s Portable Extension Metadata, a subset of shema
metadata, can be installed to add validation to the Entity Module and
its entities, http://visualstudiogallery.msdn.microsoft.com/en-
us/e6467914-d48d-4075-8885-ce5a0dcb744d
25. PEM
After installing PEM, validation not only shows up in properties,
but generation code can be generated through T4.
27. Object-Relational Mapping (ORM)
NHibernate, the .NET version of Hibernate, can be used as a object-
relational mapping (ORM) and persistence framework that allows you
to map .NET objects to relational database tables using (XML)
configuration files.
Its purpose is to relieve the developer from a significant amount of
relational data persistence-related programming tasks.
The main advantages of Hibernate is that maps database entities to
objects and hides the details of the data access from the business logic.
Hibernate uses prepared statements, so it is protected
from direct SQL injection, but it could still be vulnerable to
injecting HQL statements which are more complex to
execute.
29. NHibernate Validator
NHibernate has it’s own Validator plugin
http://nhforge.org/wikis/validator/nhibernate-validator-1-0-0-
documentation.aspx .
This validator (or constraint) will not only validate the values but
can also validate the size of the data before being persisted.
Sample constraint annotations:
public class Address {
[NotNull]
private string name; // Cannot be null
[NotNull]
[Length(Max = 5, Message = "{long}")]
[Pattern(Regex = "[0-9]+")] // Regex for Digits
private string zip; // 5 digits
30. Recommendations
It is recommended to validate the data at the entity level, just in
case the Front End is compromised.
ORM’s not only make the coding of data easier to the Database, by
not using SQL in multiple places, but also alleviates many of the
Dynamic SQL issues.