Database securityinjection and other

attacks

Ahmed shamel

supervised by:Dr. shimaa hameed

Introduction

What Is Database Security?

Database

It is a collection of information stored in a computer.

Security

It is being free from danger.

Database Security

It is the mechanisms that protect the database

against intentional or accidental threats.

Three Main Aspects

What data base need?

Secrecy Integrity Availability

Secrecy It is protecting the database from

unauthorized users.

Ensures that users are allowed to do the things they are trying to do.

For examples,The employees should not see the salaries of their managers.

Only authorized users should be allowed to modify data.

Ensures that what users are trying to do is correct.

For examples,An employee should be able to modify his or her own information.

Integrity

Authorized users should be able to access data at any time they need for Legal purposes as necessary

For examples,Payment orders regarding taxes should be made on time by the tax law.

Availability

Threat

Threat is any intentional or accidental event that may adversely affect the system.

Examples of threats:

- Using another person’s log-in name to access data.

- Unauthorized copying data.

- Program/Data alteration.

- Illegal entry by hacker

- Viruses

Kinds of Threat1. Non-fraudulent Threat

Natural or accidental disasters. Errors or bugs in hardware or software. Human errors.

2. fraudulent Threat Exploitation of Vulnerable . Input Injection (Formerly SQL Injection) .

Input Injection (Formerly SQL Injection)

SQL injection is a technique where malicious users can inject SQL commands into an SQL statement, via web page input.

Injected SQL commands can alter SQL statement and compromise the security of a web application.

There are two major types of database injection attacks :

1) SQL Injection that targets traditional database systems .

2) NoSQL (stands for not only SQL( Injection that targets Big Data platforms.

SQL Injection attacks usually involve inserting (or “injecting”) unauthorized or malicious statements into the input fields of web applications. On the other hand, NoSQL injection attacks involve inserting malicious statements into Big Data components .

In both types, a successful Input Injection attack can give an attacker unrestricted access to an entire database.

Legal access by user name password

Big websites usually use a variety of databases, because different databases serve different purposes. 

How the Injection (Statements ) work? the web application is literally asking the database

server:((do we have a user with the username 'Ahmed' and the password 'AAAA' registered in the system? ))

the Sql Syntax is broken and an error occurs. This plays a key role in Sql injection

if an attacker is able to "smuggle " special character (which is not filtered by web application)It is possible to modify the Sql queries, their logic and hence the application's behavior.

checking the web design if it pass special character to database queries

What happen if we pass this command throw the web application

What in fact happen inside the Database

The statement which always true 1=1

The attacker is successfully authenticated as the first user from the top of the list (the first row) for ex:

Threat Countermeasures

Computer-Based Controls:

- Authorization

- Authenticating

- Backup and Recovery

- view

- Encryption

- RAID Technology

AuthorizationThe granting of a privilege that enable a user to have legitimate access to a system.

AuthenticatingA system administrator is responsible for allowing users to have access to the system by creating individual user accounts.

Backup & RecoveryIs the process of periodically taking a copy of the database and log file onto offline storage media.

Viewhiding parts of the database from certain users that provides a powerful and flexible security mechanism.

Redundant Array of Independent Disks (RAID)The hardware that the DBMS is running on must be fault-tolerant, meaning that the DBMS should continue to operate even if one of the hardware components fails.