This document discusses SQL injection, which is a security vulnerability that allows attackers to interfere with how a database operates. SQL injection occurs when user input is not sanitized and is used directly in SQL queries, allowing attackers to alter the structure and meaning of queries. The document provides an example of how an attacker could log in without a password by adding SQL code to the username field. It also lists some common SQL injection techniques like using comments, concatenation, and wildcards. Finally, it points to additional online resources for learning more about SQL injection and database security.
The document discusses SQL injection, including its types, methodology, attack queries, and prevention. SQL injection is a code injection technique where a hacker manipulates SQL commands to access a database and sensitive information. It can result in identity spoofing, modifying data, gaining administrative privileges, denial of service attacks, and more. The document outlines the steps of a SQL injection attack and types of queries used. Prevention methods include minimizing privileges, coding standards, and firewalls.
This document discusses SQL injection (SQLI), which is a code injection technique used to attack data-driven applications. SQLI works by inserting malicious SQL statements into entry fields for execution on the backend database. This allows attackers to read sensitive data, modify database contents, and perform administration tasks. The document outlines common SQLI attack methods like error-based and union-based techniques. It also categorizes SQLI attacks as in-band, inferential/blind, or out-of-band based on how results are returned. Examples are provided to illustrate how SQLI exploits vulnerabilities in dynamic SQL queries.
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.
This document discusses SQL injection attacks and how to mitigate them. It begins by explaining how injection attacks work by tricking applications into executing unintended commands. It then provides examples of how SQL injection can be used to conduct unauthorized access and data modification attacks. The document discusses techniques for finding and exploiting SQL injection vulnerabilities, including through the SELECT, INSERT, UPDATE and UNION commands. It also covers ways to mitigate injection attacks, such as using prepared statements with bound parameters instead of concatenating strings.
This document discusses SQL injection, including what it is, how it works, and how to perform SQL injection attacks to extract information from a database and alter data. It provides examples of SQL queries that can be used to find the number of columns in a table, determine table and column names, and extract or alter data. The document notes that proper input validation and use of prepared statements are needed to prevent SQL injection attacks, and that no single solution can fully prevent SQL injection.
This document discusses SQL injection and techniques to prevent it. SQL injection occurs when malicious SQL statements are inserted into an entry field to exploit vulnerabilities in the underlying database. Attackers can use SQL injection to bypass login screens or retrieve sensitive data. To prevent SQL injection, developers should escape special characters in user input before submitting queries, use prepared statements with bound parameters, and validate and sanitize all input. Input escaping involves using database-specific escape functions like mysql_real_escape_string() to avoid unintended SQL commands. Proper input validation and escaping helps prevent SQL 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 (e.g. to dump the database contents to the attacker).
• 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.
The document discusses SQL injection, including its types, methodology, attack queries, and prevention. SQL injection is a code injection technique where a hacker manipulates SQL commands to access a database and sensitive information. It can result in identity spoofing, modifying data, gaining administrative privileges, denial of service attacks, and more. The document outlines the steps of a SQL injection attack and types of queries used. Prevention methods include minimizing privileges, coding standards, and firewalls.
This document discusses SQL injection (SQLI), which is a code injection technique used to attack data-driven applications. SQLI works by inserting malicious SQL statements into entry fields for execution on the backend database. This allows attackers to read sensitive data, modify database contents, and perform administration tasks. The document outlines common SQLI attack methods like error-based and union-based techniques. It also categorizes SQLI attacks as in-band, inferential/blind, or out-of-band based on how results are returned. Examples are provided to illustrate how SQLI exploits vulnerabilities in dynamic SQL queries.
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.
This document discusses SQL injection attacks and how to mitigate them. It begins by explaining how injection attacks work by tricking applications into executing unintended commands. It then provides examples of how SQL injection can be used to conduct unauthorized access and data modification attacks. The document discusses techniques for finding and exploiting SQL injection vulnerabilities, including through the SELECT, INSERT, UPDATE and UNION commands. It also covers ways to mitigate injection attacks, such as using prepared statements with bound parameters instead of concatenating strings.
This document discusses SQL injection, including what it is, how it works, and how to perform SQL injection attacks to extract information from a database and alter data. It provides examples of SQL queries that can be used to find the number of columns in a table, determine table and column names, and extract or alter data. The document notes that proper input validation and use of prepared statements are needed to prevent SQL injection attacks, and that no single solution can fully prevent SQL injection.
This document discusses SQL injection and techniques to prevent it. SQL injection occurs when malicious SQL statements are inserted into an entry field to exploit vulnerabilities in the underlying database. Attackers can use SQL injection to bypass login screens or retrieve sensitive data. To prevent SQL injection, developers should escape special characters in user input before submitting queries, use prepared statements with bound parameters, and validate and sanitize all input. Input escaping involves using database-specific escape functions like mysql_real_escape_string() to avoid unintended SQL commands. Proper input validation and escaping helps prevent SQL 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 (e.g. to dump the database contents to the attacker).
• 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.
The document discusses SQL injection attacks, including what SQL injection is, types of SQL injection attacks such as first and second order attacks, mechanisms for injection through user input or cookies, and techniques for preventing SQL injection like defensive coding practices and input validation. SQL injection is a code injection technique where malicious SQL statements are inserted into an entry field for execution by the backend database, allowing attackers to view or manipulate restricted data in the database. The document provides examples of SQL injection and explores ways attackers can infer information and encode attacks despite prevention methods.
SQL is a language used to access and manipulate databases. It allows users to execute queries, retrieve, insert, update and delete data from databases. SQL injection occurs when malicious code is injected into an SQL query, which can compromise the security of a database. To prevent SQL injection, developers should validate all user input, escape special characters, limit database permissions, and configure databases to not display error information to users.
The document discusses SQL injection attacks and how they work. SQL injection occurs when user input is inserted directly into an SQL query string without proper validation or escaping. This allows attackers to alter the structure of the intended SQL query and potentially gain unauthorized access to sensitive data or make unauthorized changes to the database. The document provides examples of vulnerable queries and how attackers can exploit them to inject malicious SQL code. It also lists some common techniques used in SQL injection attacks and provides recommendations for preventing SQL injection vulnerabilities.
SQL injection is a technique where malicious users can inject SQL commands into a web page input to alter SQL statements and compromise security. Attackers can exploit SQL injection flaws using techniques like the union operator to combine queries, boolean logic to verify conditions, error-based attacks to retrieve information, and time delays to conditionally delay responses. Proper sanitization of user input is needed to prevent stored procedure injection and protect websites from SQL injection attacks.
SQL injection is a type of attack where malicious SQL code is injected into an application's database query, potentially exposing or modifying private data. Attackers can bypass logins, access secret data, modify website contents, or shut down databases. SQL injection occurs when user input is not sanitized before being used in SQL queries. Attackers first find vulnerable websites, then check for errors to determine the number of columns. They use "union select" statements to discover which columns are responsive to queries, allowing them to extract data like user credentials or database contents. Developers should sanitize all user inputs to prevent SQL injection attacks.
The document discusses SQL injection attacks. It explains that SQL injection works by tricking web applications into treating malicious user input as SQL code rather than data. This allows attackers to view sensitive data from the database or make changes by having the application execute unintended SQL commands. The key to preventing SQL injection is using prepared statements with bound parameters rather than concatenating user input into SQL queries. Other types of injection attacks on different interpreters are also discussed.
This document discusses SQL injection, including what it is, how it works, and its impacts. It defines SQL injection as a dangerous web attack that leverages vulnerabilities in web applications to bypass authentication and modify or delete database data. The summary explains that SQL injection works by manipulating SQL queries passed to a backend database, such as by appending additional SQL statements or modifying the structure of the original query. Some impacts of successful SQL injection attacks mentioned are leakage of sensitive information, reputation decline, data loss, and denial of service. Tools for finding SQL injection vulnerabilities like sqlmap and uniscan are also briefly described.
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.
This Slide contain information about the SQL injection.
Types of SQL injection and some case study about the SQL injection and some technique so we prevent our system
This document provides an introduction to SQL injection basics. It defines SQL injection as executing a SQL query or statement by injecting it into a user input field. The document outlines why SQL injection is studied, provides a sample database structure, and describes generic SQL queries and operators like UNION and ORDER BY. It also categorizes different types of SQL injection and attacks. The remainder of the document previews upcoming topics on blind SQL injection, data extraction techniques, and prevention.
This document discusses SQL injection attacks and how to prevent them. It describes different types of SQL injection like blind SQL injection and union-based injection. It provides examples of vulnerable code and how attackers can exploit it. Finally, it recommends best practices for prevention, including using parameterized queries, stored procedures, input validation, and secure configuration.
SQL injection is a code injection technique that exploits vulnerabilities in database-driven web applications. It occurs when user input is not validated or sanitized for string literal escape characters that are part of SQL statements. This allows attackers to interfere with the queries and obtain unauthorized access to sensitive data or make changes to the database. The document then provides step-by-step instructions on how to scan for vulnerabilities, determine database details like name and tables, extract data like user credentials, bypass protections like magic quotes, and use tools to automate the process.
According to a 2015 study, 86% of over 30,000 websites tested had at least one serious vulnerability. Of the vulnerabilities found, 61% were resolved within 193 days. SQL injection is a type of attack where an attacker tries to alter SQL statements by inserting new SQL keywords or operators. Examples provided demonstrate how an attacker can use SQL injection to drop all databases or return all records. Prevention techniques like escaping characters and using prepared statements can help protect against SQL injection attacks.
This document discusses SQL injection and the sqlmap tool. It provides an overview of SQL injection, describes how sqlmap can be used to find and exploit SQL injection vulnerabilities, and demonstrates how it can be used to enumerate databases and files systems, and in some cases obtain remote access. It also discusses mitigation techniques like input sanitization and using prepared statements.
SQL injection is a code injection technique that attacks data-driven applications. It involves inserting malicious SQL statements into entry fields that are then executed by the database. There are different types of SQL injection attacks, including directly injecting code to immediately execute or injecting into persistent storage to be triggered later. Injection can occur through user input, cookies, or server variables. Prevention techniques aim to stop these types of attacks from harming databases.
SQL injections are a type of attack on databases that use SQL code to access unauthorized data. Attackers can use SQL injections to steal login credentials, manipulate user data, or delete accounts by inserting malicious SQL code through vulnerable website login forms. While SQL injections have been a known threat for over 15 years, they remain one of the biggest risks to websites and databases today. Developers can prevent SQL injections through input validation, using prepared statements, patching vulnerabilities, and employing web application firewalls.
SQL injection is a common web application security vulnerability that allows attackers to control an application's database by tricking the application into sending unexpected SQL commands to the database. It works by submitting malicious SQL code as input, which gets executed by the database since the application concatenates user input directly into SQL queries. The key to preventing SQL injection is using prepared statements with bound parameters instead of building SQL queries through string concatenation. This separates the SQL statement from any user-supplied input that could contain malicious code.
The document discusses SQL injection and GreenSQL. SQL injection is a code injection technique that allows attackers to gain unauthorized access to databases. GreenSQL is a database firewall that works as a proxy for SQL commands, calculates query risks, and supports different protection modes like IDS, IPS, and learning modes. It fingerprints databases and detects risky queries like stack-based and tautological queries. GreenSQL provides a dashboard to monitor queries and configure whitelist rules and alerts.
The document discusses SQL injection and GreenSQL. SQL injection is a code injection technique that allows attackers to gain unauthorized access to databases. GreenSQL is a database firewall that works as a proxy for SQL commands, calculates query risks, and supports different protection modes like IDS, IPS, and learning modes. It fingerprints databases and detects risky queries like stack-based and tautological queries. GreenSQL provides a dashboard to monitor queries and configure whitelist rules and alerts.
The document discusses SQL injection attacks, including what SQL injection is, types of SQL injection attacks such as first and second order attacks, mechanisms for injection through user input or cookies, and techniques for preventing SQL injection like defensive coding practices and input validation. SQL injection is a code injection technique where malicious SQL statements are inserted into an entry field for execution by the backend database, allowing attackers to view or manipulate restricted data in the database. The document provides examples of SQL injection and explores ways attackers can infer information and encode attacks despite prevention methods.
SQL is a language used to access and manipulate databases. It allows users to execute queries, retrieve, insert, update and delete data from databases. SQL injection occurs when malicious code is injected into an SQL query, which can compromise the security of a database. To prevent SQL injection, developers should validate all user input, escape special characters, limit database permissions, and configure databases to not display error information to users.
The document discusses SQL injection attacks and how they work. SQL injection occurs when user input is inserted directly into an SQL query string without proper validation or escaping. This allows attackers to alter the structure of the intended SQL query and potentially gain unauthorized access to sensitive data or make unauthorized changes to the database. The document provides examples of vulnerable queries and how attackers can exploit them to inject malicious SQL code. It also lists some common techniques used in SQL injection attacks and provides recommendations for preventing SQL injection vulnerabilities.
SQL injection is a technique where malicious users can inject SQL commands into a web page input to alter SQL statements and compromise security. Attackers can exploit SQL injection flaws using techniques like the union operator to combine queries, boolean logic to verify conditions, error-based attacks to retrieve information, and time delays to conditionally delay responses. Proper sanitization of user input is needed to prevent stored procedure injection and protect websites from SQL injection attacks.
SQL injection is a type of attack where malicious SQL code is injected into an application's database query, potentially exposing or modifying private data. Attackers can bypass logins, access secret data, modify website contents, or shut down databases. SQL injection occurs when user input is not sanitized before being used in SQL queries. Attackers first find vulnerable websites, then check for errors to determine the number of columns. They use "union select" statements to discover which columns are responsive to queries, allowing them to extract data like user credentials or database contents. Developers should sanitize all user inputs to prevent SQL injection attacks.
The document discusses SQL injection attacks. It explains that SQL injection works by tricking web applications into treating malicious user input as SQL code rather than data. This allows attackers to view sensitive data from the database or make changes by having the application execute unintended SQL commands. The key to preventing SQL injection is using prepared statements with bound parameters rather than concatenating user input into SQL queries. Other types of injection attacks on different interpreters are also discussed.
This document discusses SQL injection, including what it is, how it works, and its impacts. It defines SQL injection as a dangerous web attack that leverages vulnerabilities in web applications to bypass authentication and modify or delete database data. The summary explains that SQL injection works by manipulating SQL queries passed to a backend database, such as by appending additional SQL statements or modifying the structure of the original query. Some impacts of successful SQL injection attacks mentioned are leakage of sensitive information, reputation decline, data loss, and denial of service. Tools for finding SQL injection vulnerabilities like sqlmap and uniscan are also briefly described.
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.
This Slide contain information about the SQL injection.
Types of SQL injection and some case study about the SQL injection and some technique so we prevent our system
This document provides an introduction to SQL injection basics. It defines SQL injection as executing a SQL query or statement by injecting it into a user input field. The document outlines why SQL injection is studied, provides a sample database structure, and describes generic SQL queries and operators like UNION and ORDER BY. It also categorizes different types of SQL injection and attacks. The remainder of the document previews upcoming topics on blind SQL injection, data extraction techniques, and prevention.
This document discusses SQL injection attacks and how to prevent them. It describes different types of SQL injection like blind SQL injection and union-based injection. It provides examples of vulnerable code and how attackers can exploit it. Finally, it recommends best practices for prevention, including using parameterized queries, stored procedures, input validation, and secure configuration.
SQL injection is a code injection technique that exploits vulnerabilities in database-driven web applications. It occurs when user input is not validated or sanitized for string literal escape characters that are part of SQL statements. This allows attackers to interfere with the queries and obtain unauthorized access to sensitive data or make changes to the database. The document then provides step-by-step instructions on how to scan for vulnerabilities, determine database details like name and tables, extract data like user credentials, bypass protections like magic quotes, and use tools to automate the process.
According to a 2015 study, 86% of over 30,000 websites tested had at least one serious vulnerability. Of the vulnerabilities found, 61% were resolved within 193 days. SQL injection is a type of attack where an attacker tries to alter SQL statements by inserting new SQL keywords or operators. Examples provided demonstrate how an attacker can use SQL injection to drop all databases or return all records. Prevention techniques like escaping characters and using prepared statements can help protect against SQL injection attacks.
This document discusses SQL injection and the sqlmap tool. It provides an overview of SQL injection, describes how sqlmap can be used to find and exploit SQL injection vulnerabilities, and demonstrates how it can be used to enumerate databases and files systems, and in some cases obtain remote access. It also discusses mitigation techniques like input sanitization and using prepared statements.
SQL injection is a code injection technique that attacks data-driven applications. It involves inserting malicious SQL statements into entry fields that are then executed by the database. There are different types of SQL injection attacks, including directly injecting code to immediately execute or injecting into persistent storage to be triggered later. Injection can occur through user input, cookies, or server variables. Prevention techniques aim to stop these types of attacks from harming databases.
SQL injections are a type of attack on databases that use SQL code to access unauthorized data. Attackers can use SQL injections to steal login credentials, manipulate user data, or delete accounts by inserting malicious SQL code through vulnerable website login forms. While SQL injections have been a known threat for over 15 years, they remain one of the biggest risks to websites and databases today. Developers can prevent SQL injections through input validation, using prepared statements, patching vulnerabilities, and employing web application firewalls.
SQL injection is a common web application security vulnerability that allows attackers to control an application's database by tricking the application into sending unexpected SQL commands to the database. It works by submitting malicious SQL code as input, which gets executed by the database since the application concatenates user input directly into SQL queries. The key to preventing SQL injection is using prepared statements with bound parameters instead of building SQL queries through string concatenation. This separates the SQL statement from any user-supplied input that could contain malicious code.
The document discusses SQL injection and GreenSQL. SQL injection is a code injection technique that allows attackers to gain unauthorized access to databases. GreenSQL is a database firewall that works as a proxy for SQL commands, calculates query risks, and supports different protection modes like IDS, IPS, and learning modes. It fingerprints databases and detects risky queries like stack-based and tautological queries. GreenSQL provides a dashboard to monitor queries and configure whitelist rules and alerts.
The document discusses SQL injection and GreenSQL. SQL injection is a code injection technique that allows attackers to gain unauthorized access to databases. GreenSQL is a database firewall that works as a proxy for SQL commands, calculates query risks, and supports different protection modes like IDS, IPS, and learning modes. It fingerprints databases and detects risky queries like stack-based and tautological queries. GreenSQL provides a dashboard to monitor queries and configure whitelist rules and alerts.
This document discusses SQL injection attacks and how to mitigate them. It begins by defining injection attacks as tricks that cause an application to unintentionally include commands in user-submitted data. It then explains how SQL injection works by having the attacker submit malicious SQL code in a web form. The document outlines several examples of SQL injection attacks, such as unauthorized access, database modification, and denial of service. It discusses techniques for finding and exploiting SQL injection vulnerabilities. Finally, it recommends effective mitigation strategies like prepared statements and input whitelisting to protect against SQL injection attacks.
The document discusses web application security and SQL injections. It defines a web application as any application served via HTTP/HTTPS from a remote server. Web applications often collect sensitive personal data, so security is important to protect privacy and limit legal liability. Hackers can exploit vulnerabilities like SQL injections to access unauthorized data. The document outlines common SQL injection techniques, like modifying queries with additional commands or UNION operators, and recommends best practices like parameterized queries and input validation to prevent SQL injections.
SQL injection is a type of security exploit in which the attacker adds Structured Query Language (SQL) code to a Web form input box to gain access to resources or make changes to data. An SQL query is a request for some action to be performed on a database. Typically, on a Web form for user authentication, when a user enters their name and password into the text boxes provided for them, those values are inserted into a SELECT query. If the values entered are found as expected, the user is allowed access; if they aren't found, access is denied. However, most Web forms have no mechanisms in place to block input other than names and passwords. Unless such precautions are taken, an attacker can use the input boxes to send their own request to the database, which could allow them to download the entire database or interact with it in other illicit ways.
This document provides examples of different techniques for performing SQL injection, including error-based, union-based, and blind SQL injection. It demonstrates how to use each technique to extract information like the database user from Microsoft SQL Server. Error-based SQL injection involves causing errors and analyzing the error messages. Union-based SQL injection uses the SQL UNION operator to combine result sets. Blind SQL injection uses time delays or other inferences to determine information without direct errors or results.
Understanding and preventing sql injection attacksKevin Kline
SQL Injection attacks are one of the most common hacker tricks used on the web. Learn what a SQL injection attack is and why you should be concerned about them.
This all new session is loaded with demos. You’ll get to witness first-hand several different types of SQL injection attacks, how to find them, and how to block them.
This document discusses SQL injection techniques, including basics, advanced methods, and blind SQL injection. It begins with an overview of SQL injection and how websites interact with databases. It then demonstrates basic SQL injection to bypass authentication. Advanced techniques covered include finding database/table/column details and extracting data. Blind SQL injection is discussed for when errors are not displayed, requiring binary searching of ASCII character codes to extract information character by character.
This document discusses various cybersecurity topics related to PHP, including hacking, attacks, and recovering from attacks. It provides an overview of general security aspects and the OSI model layers. It then covers specific types of attacks like denial-of-service, spoofing, and man-in-the-middle attacks. It also discusses vulnerabilities, exploits, and the OWASP top 10 security risks. A large portion of the document focuses on SQL injection attacks, how they work, and ways to protect against them. It also briefly discusses other injection attacks and cross-site scripting attacks.
The document discusses various web security topics such as SQL injection, cross-site scripting (XSS), cross-site request forgery (CSRF), and parameter tampering. It provides examples of these vulnerabilities and methods to prevent them, including input validation, output encoding, anti-forgery tokens, and limiting exposed functionality. The document is intended as an educational guide on common web security issues and best practices.
SQL injection is a common web application vulnerability that allows attackers to inject malicious SQL statements into an application's database. It can allow data leakage, modification, denial of access, and complete host takeover. SQL injection occurs when user-supplied input is not properly sanitized before being used in SQL queries. Developers can prevent SQL injection by using prepared statements with parameterized queries, stored procedures, and properly escaping all user input. Web application firewalls and additional defenses like whitelist input validation can also help mitigate SQL injection risks.
SQL injection is a code injection technique used to attack data-driven applications that use SQL queries to access a backend database. An attacker can insert malicious SQL statements into the login form of a web application to gain unauthorized access to the database. The document discusses what SQL injection is, types of SQL injection like in-band and out-of-band, and provides examples. It also notes that SQL injection is a serious problem that can allow attackers to delete, modify or steal data. Suggested solutions include input validation, prepared statements, and minimizing database privileges.
This document discusses SQL injection and ways to prevent it. SQL injection occurs when malicious SQL statements are inserted into an insufficiently validated string that is later executed as a database command. It can allow attackers to read or modify data in the database. The document outlines different types of SQL injection attacks and provides examples of how input validation and prepared statements can prevent injection. It also discusses command injection and file path traversal attacks.
SQL injection attacks occur when user-supplied input is inserted into SQL statements without proper validation or escaping. This can allow attackers to view sensitive data or even modify databases by altering the structure of SQL queries. The document discusses how SQL injection works, provides examples, and recommends defenses like input validation, query parameterization, and limiting database permissions.
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.
Paweł Cygal, a senior system administrator at Grand Parade, gives a presentation covering SQL injection and cross-site scripting (XSS) basics with examples using the Damn Vulnerable Web Application. The presentation defines SQL injection as a code injection technique used to attack data-driven applications by inserting malicious SQL statements. XSS enables attackers to inject client-side scripts by exploiting vulnerabilities in how a web application processes user input. Examples are provided of SQL injection and XSS vulnerabilities, along with solutions like prepared statements, input validation, and output encoding.
Prevention of SQL Injection Attack in Web Application with Host LanguageIRJET Journal
This document discusses SQL injection attacks and methods to prevent them when building web applications. It begins by defining SQL injection attacks and describing common types like tautology, union queries, and blind injection. It then presents approaches to prevent SQL injection using host languages like PHP and Java. These include prepared statements, escaping strings, and stripping tags when handling user inputs in PHP. For Java, it recommends prepared statements to protect against attackers modifying queries. The key message is that input validation and using features like prepared statements in PHP and Java can help secure databases and prevent unauthorized access during SQL queries.
SQL Injection in action with PHP and MySQLPradeep Kumar
A hands-on example for SQL injection using PHP and MySQL
It also offers an overview how it gets into in our applications and how we can overcome SQL Injection.
This document discusses SQL injections and how to prevent them. It begins by defining SQL injection as the ability to inject SQL commands into a database through an application. It then explains how SQL injections work by exploiting vulnerabilities in user input validation. The document outlines common techniques used in SQL injections and discusses how widespread this issue is. It provides recommendations for input validation, securing databases, and detecting and discouraging SQL injection attacks. The key takeaway is that proper input validation and server hardening are needed to prevent SQL injections.
Online train ticket booking system project.pdfKamal Acharya
Rail transport is one of the important modes of transport in India. Now a days we
see that there are railways that are present for the long as well as short distance
travelling which makes the life of the people easier. When compared to other
means of transport, a railway is the cheapest means of transport. The maintenance
of the railway database also plays a major role in the smooth running of this
system. The Online Train Ticket Management System will help in reserving the
tickets of the railways to travel from a particular source to the destination.
An In-Depth Exploration of Natural Language Processing: Evolution, Applicatio...DharmaBanothu
Natural language processing (NLP) has
recently garnered significant interest for the
computational representation and analysis of human
language. Its applications span multiple domains such
as machine translation, email spam detection,
information extraction, summarization, healthcare,
and question answering. This paper first delineates
four phases by examining various levels of NLP and
components of Natural Language Generation,
followed by a review of the history and progression of
NLP. Subsequently, we delve into the current state of
the art by presenting diverse NLP applications,
contemporary trends, and challenges. Finally, we
discuss some available datasets, models, and
evaluation metrics in NLP.
Learn more about Sch 40 and Sch 80 PVC conduits!
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Sachpazis_Consolidation Settlement Calculation Program-The Python Code and th...Dr.Costas Sachpazis
Consolidation Settlement Calculation Program-The Python Code
By Professor Dr. Costas Sachpazis, Civil Engineer & Geologist
This program calculates the consolidation settlement for a foundation based on soil layer properties and foundation data. It allows users to input multiple soil layers and foundation characteristics to determine the total settlement.
Data Communication and Computer Networks Management System Project Report.pdfKamal Acharya
Networking is a telecommunications network that allows computers to exchange data. In
computer networks, networked computing devices pass data to each other along data
connections. Data is transferred in the form of packets. The connections between nodes are
established using either cable media or wireless media.
2. INDEX
Ethical Hacking.
What is SQL.
How does SQL Injection work.
Example of SQL Injection.
Diagram of SQL Injection.
3. ETHICAL HACKING
Independent computer security Professionals breaking
into the computer systems.
Neither damage the target systems nor steal information.
Evaluate target systems security and report back to
owners about the Bugs found.
4. ETHICAL HACKERS BUT NOT CRIMINAL
HACKERS
Completely trustworthy.
Strong programming and computer networking skills.
Learn about the system and trying to find its weaknesses.
Techniques of Criminal hackers-Detection-Prevention.
Tester only reports findings, does not solve problems.
5. WHAT IS SQL?
SQL stands for Structured Query Language
Allows us to access a database
ANSI and ISO standard computer language
The most current standard is SQL99
SQL can:
execute queries against a database
retrieve data from a database
insert new records in a database
delete records from a database
update records in a database
6. WHAT IS A SQL INJECTION ATTACK?
Many web applications take user input from a form
Often this user input is used literally in the construction
of a SQL query submitted to a database. For example:
SELECT productdata FROM table WHERE productname =
‘user input product name’;
A SQL injection attack involves placing SQL statements
in the user input
7. HOW DOES SQL INJECTION WORK?
Common vulnerable login query
SELECT * FROM users
WHERE login = 'victor'
AND password = '123'
(If it returns something then login)
ASP/MS SQL Server login syntax
var sql = "SELECT * FROM users
WHERE login = '" + formusr +
"' AND password = '" + formpwd + "'";
8. INJECTING THROUGH STRINGS
formusr = ' or 1=1 – –
formpwd = anything
Final query would look like this:
SELECT * FROM users
WHERE username = ' ' or 1=1
– – AND password = 'anything'
9.
10. SQL INJECTION CHARACTERS
' or "character String Indicators
-- or # single-line commen
/*…*/ multiple-line comment
+ addition, concatenate (or space in url)
|| (double pipe) concatenate
% wildcard attribute indicator
11. ALL TABLES AND COLUMNS IN ONE QUERY
union select 0, sysobjects.name + ': ' + syscolumns.name
+ ': ' + systypes.name, 1, 1, '1', 1, 1, 1, 1, 1 from
sysobjects, syscolumns, systypes where sysobjects.xtype
= 'U' AND sysobjects.id = syscolumns.id AND
syscolumns.xtype = systypes.xtype --
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