This document discusses vulnerabilities in web servers and web applications. It describes the main web servers, Apache and IIS, and how they use HTTP and HTTPS to serve content to users' browsers. It also explains common technologies used to create dynamic web pages, such as CGI scripts, ASP, PHP, ColdFusion, JavaScript, and how they interface with databases through ODBC, OLE DB, and ADO. The document warns that bugs in web applications can create security vulnerabilities and enable attackers to deface websites, steal data, or use compromised servers to perform other attacks.
Ethical hacking Chapter 10 - Exploiting Web Servers - Eric VanderburgEric Vanderburg
This document discusses exploiting vulnerabilities in web servers. It describes common components of web applications like forms, CGI, ASP, and scripting languages. It also outlines vulnerabilities like SQL injection, cross-site scripting, and improper authentication. Tools for assessing these vulnerabilities are presented, including cgiscan, wfetch, and the OWASP WebGoat project for learning about attacking web applications. The importance of understanding the platform and technologies used to develop a web application is emphasized to determine the appropriate security tests.
The document discusses various web application security vulnerabilities such as hidden field manipulation, parameter tampering, cross-site scripting, and SQL injection. It provides examples of how attackers can exploit these vulnerabilities and recommendations for developers on how to prevent attacks, including sanitizing user input, encrypting cookies, and validating parameters.
Top security threats to Flash/Flex applications and how to avoid themElad Elrom
The document discusses security threats to Flash and Flex applications, such as decompiling SWF files to modify code, cross-scripting attacks by injecting malicious scripts into Flex applications, and ways developers can help prevent these attacks like using code obfuscation, restricting cross-domain policies, and sanitizing user input to remove dangerous HTML tags and scripts. It provides examples of how attackers can exploit applications and recommendations for setting security permissions and validating input to avoid vulnerabilities.
Mikhail Shcherbakov, a senior software developer at Positive Technologies, discusses the security model in the .NET Framework. He outlines how the .NET Framework uses application domains, code access security, and a transparency model to provide sandboxing of code through verification, permissions, and security attributes. The security architecture has evolved over time from .NET Framework 4 to address issues like partial trust applications and trusted chain attacks.
This document discusses server-side OpenSocial Java programming. It provides an overview of OpenSocial and OAuth, introduces the OpenSocial Java client libraries, and demonstrates 2-legged and 3-legged OAuth access and connecting to a Google Friend Connect site. Key topics covered include OpenSocial standards, who uses it, the roadmap, RESTful and RPC protocols, and examining the differences between 2-legged and 3-legged OAuth access. Useful links are also provided.
Don't Drop the SOAP: Real World Web Service Testing for Web Hackers Tom Eston
This document discusses challenges with testing web services and proposes improvements. It notes that current tools, methodologies, and testing environments for assessing web service security are inadequate. The document advocates aligning web service testing with the Penetration Testing Execution Standard methodology. It also highlights new attacks against web services and demos tools like Metasploit modules for assessing web services and the Damn Vulnerable Web Services testing environment.
Many notable and new web hacking techniques, discoveries and compromises were uncovered in 2008. During his session, the top 10 vulnerabilities present in 2008, as well as some of the prevalent security issues emerging in 2009. Attendees will virtually be able to walk through the vulnerabilities appearing on today’s corporate websites, learning real-world solutions to today’s web application security issues.
Moderator: Mike Stephenson, SC lab manager, SC Magazine
- Jeremiah Grossman, founder and chief technology officer, WhiteHat Security
Ethical hacking Chapter 10 - Exploiting Web Servers - Eric VanderburgEric Vanderburg
This document discusses exploiting vulnerabilities in web servers. It describes common components of web applications like forms, CGI, ASP, and scripting languages. It also outlines vulnerabilities like SQL injection, cross-site scripting, and improper authentication. Tools for assessing these vulnerabilities are presented, including cgiscan, wfetch, and the OWASP WebGoat project for learning about attacking web applications. The importance of understanding the platform and technologies used to develop a web application is emphasized to determine the appropriate security tests.
The document discusses various web application security vulnerabilities such as hidden field manipulation, parameter tampering, cross-site scripting, and SQL injection. It provides examples of how attackers can exploit these vulnerabilities and recommendations for developers on how to prevent attacks, including sanitizing user input, encrypting cookies, and validating parameters.
Top security threats to Flash/Flex applications and how to avoid themElad Elrom
The document discusses security threats to Flash and Flex applications, such as decompiling SWF files to modify code, cross-scripting attacks by injecting malicious scripts into Flex applications, and ways developers can help prevent these attacks like using code obfuscation, restricting cross-domain policies, and sanitizing user input to remove dangerous HTML tags and scripts. It provides examples of how attackers can exploit applications and recommendations for setting security permissions and validating input to avoid vulnerabilities.
Mikhail Shcherbakov, a senior software developer at Positive Technologies, discusses the security model in the .NET Framework. He outlines how the .NET Framework uses application domains, code access security, and a transparency model to provide sandboxing of code through verification, permissions, and security attributes. The security architecture has evolved over time from .NET Framework 4 to address issues like partial trust applications and trusted chain attacks.
This document discusses server-side OpenSocial Java programming. It provides an overview of OpenSocial and OAuth, introduces the OpenSocial Java client libraries, and demonstrates 2-legged and 3-legged OAuth access and connecting to a Google Friend Connect site. Key topics covered include OpenSocial standards, who uses it, the roadmap, RESTful and RPC protocols, and examining the differences between 2-legged and 3-legged OAuth access. Useful links are also provided.
Don't Drop the SOAP: Real World Web Service Testing for Web Hackers Tom Eston
This document discusses challenges with testing web services and proposes improvements. It notes that current tools, methodologies, and testing environments for assessing web service security are inadequate. The document advocates aligning web service testing with the Penetration Testing Execution Standard methodology. It also highlights new attacks against web services and demos tools like Metasploit modules for assessing web services and the Damn Vulnerable Web Services testing environment.
Many notable and new web hacking techniques, discoveries and compromises were uncovered in 2008. During his session, the top 10 vulnerabilities present in 2008, as well as some of the prevalent security issues emerging in 2009. Attendees will virtually be able to walk through the vulnerabilities appearing on today’s corporate websites, learning real-world solutions to today’s web application security issues.
Moderator: Mike Stephenson, SC lab manager, SC Magazine
- Jeremiah Grossman, founder and chief technology officer, WhiteHat Security
Slides for a college course based on "The Web Application Hacker's Handbook", 2nd Ed.
Teacher: Sam Bowne
Twitter: @sambowne
Website: https://samsclass.info/129S/129S_F16.shtml
This document provides an agenda for a presentation on ASP.NET fundamentals including programming models, design goals, architecture, and CLR services. It discusses how ASP.NET unifies programming models and simplifies development. It describes the Common Language Runtime, including design goals to simplify development and deployment while providing a robust execution environment. It also summarizes CLR services like type safety, memory management, and metadata.
Slides for a college course based on "The Web Application Hacker's Handbook", 2nd Ed.
Teacher: Sam Bowne
Twitter: @sambowne
Website: https://samsclass.info/129S/129S_F16.shtml
This document discusses various web application security vulnerabilities including Cross Site Request Forgery (CSRF), clickjacking, and open redirects. CSRF involves forcing unauthorized requests to a web application to perform actions on the user's behalf. Clickjacking involves tricking a user into clicking something different than what they see. Open redirects can allow attackers to redirect users to malicious sites.
The .NET Framework provides a common platform and language runtime for multiple programming languages. It includes the Common Language Specification (CLS), which defines interoperability standards, and the Common Language Runtime (CLR), which handles memory management, security, and code execution. The .NET Framework also includes a large class library called the Framework Class Library (FCL) that contains types and methods for building applications. Developers can use Visual Studio to create .NET applications using languages like C# and VB.NET, which compile to Microsoft Intermediate Language (MSIL) code that is executed within the CLR.
This document discusses the history and concepts of Representational State Transfer (REST). It provides context on how REST began in the 1990s alongside the growth of the World Wide Web. It discusses three perspectives on the web - as an information space, computational space, and hypermedia system. It also discusses Roy Fielding's dissertation which defined REST and the constraints that make it applicable to large-scale distributed hypermedia systems like the Web.
ASP.NET is a Microsoft web technology used to create dynamic web applications and services. It allows for server-side scripting, state management, and easy updating of files while the server is running. An ASP.NET file contains HTML, XML, and scripts that are executed on the server before being returned as plain HTML. IIS (Internet Information Services) is the Microsoft web server that processes ASP.NET files. It passes ASP.NET file requests to the ASP.NET engine, which reads and executes the scripts before returning the file as HTML to the browser. Virtual directories in IIS are used to share project folders so that ASP.NET files and applications can be accessed online.
The document discusses various techniques for hacking web applications and web services, including:
1. Profiling infrastructure, attacking authentication and authorization, exploiting data connectivity, attacking client-side vulnerabilities, and denial of service attacks against web applications.
2. Using automated scanning tools to discover servers, services, and vulnerabilities. Common vulnerabilities in Apache, SQL injection, and insecure web service descriptions are described.
3. Attacking web application management interfaces through insecure protocols like Telnet and exploiting features like WebDAV that allow remote file manipulation.
HTML5 and mobile applications allow developers to create rich applications using web technologies like HTML, CSS and JavaScript instead of native platforms. This document discusses how HTML5 features like geolocation, media playback, web storage and databases enable powerful mobile apps, but also present security risks if not implemented carefully. It provides examples of how cross-site scripting and exploitation of APIs could allow extraction of sensitive data from local storage, databases or the DOM in HTML5 applications.
This document provides a tutorial with 15 exercises to teach how to create a basic ASP.Net web application with user authentication and authorization. The exercises guide the user to create web forms, configure authentication using web.config files, add a login page that authenticates against a SQL database, and customize the user experience including remembering user logins.
CNIT 129S: 13: Attacking Users: Other Techniques (Part 1 of 2)Sam Bowne
Request forgery techniques like on-site request forgery (OSRF) and cross-site request forgery (CSRF) allow attackers to trick a user's browser into making requests without the user's consent. OSRF uses stored XSS to inject links that trigger requests when clicked, while CSRF embeds requests directly on malicious sites. Defenses include anti-CSRF tokens and preventing sensitive actions via GET. The same-origin policy does not fully prevent cross-domain data theft using techniques like JavaScript hijacking, Flash, and relaxed HTML5 CORS policies.
AppSec 2007 - .NET Web Services HackingShreeraj Shah
This document discusses scanning and attacking .NET web services as well as defending them. It begins with an overview of assessing .NET web services through footprinting, discovery, enumeration and profiling. It then discusses various attack vectors such as XSS, injection flaws, and information leakage. The document concludes with recommendations for code scanning, implementing a web services firewall, and secure coding practices to harden .NET web services.
CNIT 129S: Ch 3: Web Application TechnologiesSam Bowne
Slides for a college course based on "The Web Application Hacker's Handbook", 2nd Ed.
Teacher: Sam Bowne
Website: https://samsclass.info/129S/129S_F16.shtml
The document provides an introduction to web and internet technologies. It discusses topics such as internet architecture, protocols, markup languages, programming languages and paradigms for developing web applications. The agenda outlines internet technologies, programming languages and paradigms, and programming the web using both client-side and server-side technologies.
Basics overview of C#. you can refer this link of learning more about C# interview questions
http://skillgun.com/csharp/interview-questions-and-answers
SQL injection attacks occur when malicious SQL statements are injected into an application's existing SQL commands, potentially allowing attackers to alter or destroy database contents. Attackers can exploit vulnerabilities like unvalidated user input or direct use of dynamic SQL queries. To prevent this, developers should follow practices like input validation, parameterizing queries, and limiting database account privileges to only what is necessary.
This document provides an overview of ASP.NET Web API, a framework for building RESTful web services. It discusses key REST concepts like URIs, HTTP verbs, and HATEOAS. It also compares Web API to other technologies like WCF and SOAP, noting advantages of REST such as simpler CRUD operations and standardized development methodology. The document recommends resources like a book on building REST services from start to finish with ASP.NET MVC 4 and Web API.
The document discusses developing web applications using ASP.NET. It describes how ASP.NET allows creating dynamic web pages through the use of client-side and server-side scripts. ASP.NET provides advantages like accessing backend databases, robust tool support in Visual Studio, and separating application logic from presentation. The document outlines different types of web sites that can be created using ASP.NET, including file system, local IIS, and remote IIS sites. It also describes the single-file and code-behind page models in ASP.NET for organizing code and markup.
Slides for a college course at City College San Francisco. Based on "Hands-On Ethical Hacking and Network Defense, Third Edition" by Michael T. Simpson, Kent Backman, and James Corley -- ISBN: 9781285454610.
Instructor: Sam Bowne
Class website: https://samsclass.info/123/123_S17.shtml
For a college class in Ethical Hacking and Network Defense at CCSF, by Sam Bowne. More info at https://samsclass.info/123/123_F17.shtml
Based on this book
Hands-On Ethical Hacking and Network Defense, Third Edition by Michael T. Simpson, Kent Backman, and James Corley -- ISBN: 9781285454610
Slides for a college course based on "The Web Application Hacker's Handbook", 2nd Ed.
Teacher: Sam Bowne
Twitter: @sambowne
Website: https://samsclass.info/129S/129S_F16.shtml
This document provides an agenda for a presentation on ASP.NET fundamentals including programming models, design goals, architecture, and CLR services. It discusses how ASP.NET unifies programming models and simplifies development. It describes the Common Language Runtime, including design goals to simplify development and deployment while providing a robust execution environment. It also summarizes CLR services like type safety, memory management, and metadata.
Slides for a college course based on "The Web Application Hacker's Handbook", 2nd Ed.
Teacher: Sam Bowne
Twitter: @sambowne
Website: https://samsclass.info/129S/129S_F16.shtml
This document discusses various web application security vulnerabilities including Cross Site Request Forgery (CSRF), clickjacking, and open redirects. CSRF involves forcing unauthorized requests to a web application to perform actions on the user's behalf. Clickjacking involves tricking a user into clicking something different than what they see. Open redirects can allow attackers to redirect users to malicious sites.
The .NET Framework provides a common platform and language runtime for multiple programming languages. It includes the Common Language Specification (CLS), which defines interoperability standards, and the Common Language Runtime (CLR), which handles memory management, security, and code execution. The .NET Framework also includes a large class library called the Framework Class Library (FCL) that contains types and methods for building applications. Developers can use Visual Studio to create .NET applications using languages like C# and VB.NET, which compile to Microsoft Intermediate Language (MSIL) code that is executed within the CLR.
This document discusses the history and concepts of Representational State Transfer (REST). It provides context on how REST began in the 1990s alongside the growth of the World Wide Web. It discusses three perspectives on the web - as an information space, computational space, and hypermedia system. It also discusses Roy Fielding's dissertation which defined REST and the constraints that make it applicable to large-scale distributed hypermedia systems like the Web.
ASP.NET is a Microsoft web technology used to create dynamic web applications and services. It allows for server-side scripting, state management, and easy updating of files while the server is running. An ASP.NET file contains HTML, XML, and scripts that are executed on the server before being returned as plain HTML. IIS (Internet Information Services) is the Microsoft web server that processes ASP.NET files. It passes ASP.NET file requests to the ASP.NET engine, which reads and executes the scripts before returning the file as HTML to the browser. Virtual directories in IIS are used to share project folders so that ASP.NET files and applications can be accessed online.
The document discusses various techniques for hacking web applications and web services, including:
1. Profiling infrastructure, attacking authentication and authorization, exploiting data connectivity, attacking client-side vulnerabilities, and denial of service attacks against web applications.
2. Using automated scanning tools to discover servers, services, and vulnerabilities. Common vulnerabilities in Apache, SQL injection, and insecure web service descriptions are described.
3. Attacking web application management interfaces through insecure protocols like Telnet and exploiting features like WebDAV that allow remote file manipulation.
HTML5 and mobile applications allow developers to create rich applications using web technologies like HTML, CSS and JavaScript instead of native platforms. This document discusses how HTML5 features like geolocation, media playback, web storage and databases enable powerful mobile apps, but also present security risks if not implemented carefully. It provides examples of how cross-site scripting and exploitation of APIs could allow extraction of sensitive data from local storage, databases or the DOM in HTML5 applications.
This document provides a tutorial with 15 exercises to teach how to create a basic ASP.Net web application with user authentication and authorization. The exercises guide the user to create web forms, configure authentication using web.config files, add a login page that authenticates against a SQL database, and customize the user experience including remembering user logins.
CNIT 129S: 13: Attacking Users: Other Techniques (Part 1 of 2)Sam Bowne
Request forgery techniques like on-site request forgery (OSRF) and cross-site request forgery (CSRF) allow attackers to trick a user's browser into making requests without the user's consent. OSRF uses stored XSS to inject links that trigger requests when clicked, while CSRF embeds requests directly on malicious sites. Defenses include anti-CSRF tokens and preventing sensitive actions via GET. The same-origin policy does not fully prevent cross-domain data theft using techniques like JavaScript hijacking, Flash, and relaxed HTML5 CORS policies.
AppSec 2007 - .NET Web Services HackingShreeraj Shah
This document discusses scanning and attacking .NET web services as well as defending them. It begins with an overview of assessing .NET web services through footprinting, discovery, enumeration and profiling. It then discusses various attack vectors such as XSS, injection flaws, and information leakage. The document concludes with recommendations for code scanning, implementing a web services firewall, and secure coding practices to harden .NET web services.
CNIT 129S: Ch 3: Web Application TechnologiesSam Bowne
Slides for a college course based on "The Web Application Hacker's Handbook", 2nd Ed.
Teacher: Sam Bowne
Website: https://samsclass.info/129S/129S_F16.shtml
The document provides an introduction to web and internet technologies. It discusses topics such as internet architecture, protocols, markup languages, programming languages and paradigms for developing web applications. The agenda outlines internet technologies, programming languages and paradigms, and programming the web using both client-side and server-side technologies.
Basics overview of C#. you can refer this link of learning more about C# interview questions
http://skillgun.com/csharp/interview-questions-and-answers
SQL injection attacks occur when malicious SQL statements are injected into an application's existing SQL commands, potentially allowing attackers to alter or destroy database contents. Attackers can exploit vulnerabilities like unvalidated user input or direct use of dynamic SQL queries. To prevent this, developers should follow practices like input validation, parameterizing queries, and limiting database account privileges to only what is necessary.
This document provides an overview of ASP.NET Web API, a framework for building RESTful web services. It discusses key REST concepts like URIs, HTTP verbs, and HATEOAS. It also compares Web API to other technologies like WCF and SOAP, noting advantages of REST such as simpler CRUD operations and standardized development methodology. The document recommends resources like a book on building REST services from start to finish with ASP.NET MVC 4 and Web API.
The document discusses developing web applications using ASP.NET. It describes how ASP.NET allows creating dynamic web pages through the use of client-side and server-side scripts. ASP.NET provides advantages like accessing backend databases, robust tool support in Visual Studio, and separating application logic from presentation. The document outlines different types of web sites that can be created using ASP.NET, including file system, local IIS, and remote IIS sites. It also describes the single-file and code-behind page models in ASP.NET for organizing code and markup.
Slides for a college course at City College San Francisco. Based on "Hands-On Ethical Hacking and Network Defense, Third Edition" by Michael T. Simpson, Kent Backman, and James Corley -- ISBN: 9781285454610.
Instructor: Sam Bowne
Class website: https://samsclass.info/123/123_S17.shtml
For a college class in Ethical Hacking and Network Defense at CCSF, by Sam Bowne. More info at https://samsclass.info/123/123_F17.shtml
Based on this book
Hands-On Ethical Hacking and Network Defense, Third Edition by Michael T. Simpson, Kent Backman, and James Corley -- ISBN: 9781285454610
The document contains 29 questions and answers related to ASP.net and C# programming. It discusses topics like the differences between ASP and ASP.NET, how to identify a postback, accessing user locale information, signing out of forms authentication, and registering custom server controls. The document is an interview preparation guide that covers common ASP.net and C# concepts and techniques.
This document provides an introduction and overview of ASP.NET, including what ASP.NET is, how it differs from ASP, ASP.NET files and how ASP.NET works. It describes the ASP.NET lifecycle and architecture. It also discusses ASP.NET page structure, development models including web forms and MVC, and provides examples of ASP.NET code. Key features and potential drawbacks of ASP.NET are summarized.
The document provides an overview of web development. It discusses how the web was created in 1989 by Tim Berners-Lee and the initial technologies of HTTP, HTML, and URLs. It then explains how a basic web application works with a browser connecting to a web server to request and receive HTML files and other resources. The document also summarizes key concepts in web development including front-end versus back-end code, common programming languages and frameworks, database usage, and standards that allow interoperability across systems.
Active server pages .net role discusses shifting from classic ASP to ASP.NET, which provides a framework with namespaces and can be developed using an IDE. ASP.NET uses web forms and pages, separating HTML from application logic. It discusses state management techniques like cookies and hidden fields to maintain state across HTTP requests. The key objectives of ASP.NET are to create web forms with server controls, separate code and content, display dynamic data through binding, and debug ASP.NET pages.
DevNext - Web Programming Concepts Using Asp NetAdil Mughal
This document provides an overview of web programming concepts using ASP.NET. It discusses HTTP requests and the difference between static and dynamic web pages. It also covers ASP.NET page lifecycles, client-side vs server-side processing, and state management using view state. The document includes demonstrations of ASP.NET web applications and key concepts.
The document provides an overview of the key components that go into making a PHP and MySQL based web application. It discusses the use of HTML, CSS, JavaScript, jQuery, client-side and server-side scripting, AJAX, PHP, MySQL, code editors, tools for wireframing, image editing and more. It also covers aspects like hosting, version management, software deployment, traditional and agile development methodologies, and software documentation.
ASP.NET is a specification developed by Microsoft to create dynamic web applications. It is part of the .NET framework and allows creating web applications using languages like C# and VB.NET that compile to MSIL. The key difference between ASP and ASP.NET is that ASP uses scripting languages like VBScript that are interpreted, while ASP.NET uses compiled languages. ASP.NET web forms allow creating powerful forms-based web pages using server controls.
CyberLab Training Division :
ASP.NET is a web application framework developed and marketed by Microsoft to allow programmers to build dynamic web sites. It allows you to use a full featured programming language such as C# or VB.NET to build web applications easily.
This tutorial covers all the basic elements of ASP.NET that a beginner would require to get started.
Audience
This tutorial has been prepared for the beginners to help them understand basic ASP.NET programming. After completing this tutorial you will find yourself at a moderate level of expertise in ASP.NET programming from where you can take yourself to next levels.
Prerequisites
Before proceeding with this tutorial, you should have a basic understanding of .NET programming language. As we are going to develop web-based applications using ASP.NET web application framework, it will be good if you have an understanding of other web technologies such as HTML, CSS, AJAX. etc
ASP.NET supports three different development models:
Web Pages, MVC (Model View Controller), and Web Forms.
For More Details.
Visit: http://www.cyberlabzone.com
The .NET Framework is a development platform that provides a managed computing environment and common language runtime. It includes common .NET languages like C# and VB compiled to intermediate language. The common language runtime translates this to native code and provides services like memory management. The class library includes prebuilt functionality. ASP.NET is built on .NET and hosts web applications, supporting authentication and data storage. Visual Studio is an IDE that facilitates application development in this platform.
This document provides information about Dominant Infotech, a company that offers web and software development outsourcing services. It lists their core service areas such as web development, mobile app development, and graphic design. The document also discusses technologies used like PHP, Java, and frameworks like CodeIgniter. It provides an overview of how to install and use CodeIgniter, including MVC architecture and basic CRUD operations. Contact details are provided at the end.
asp.net is a web development platform, which provides a programming model and various services required to build up robust web application for PC, as well as mobile device.
Web development concepts using microsoft technologiesHosam Kamel
This document summarizes a presentation about web development concepts using Microsoft technologies. It introduces ASP.NET as a framework for building web applications in C# or VB.NET using Visual Studio. It describes ASP.NET features like controls, page lifecycle, and different coding styles. It also discusses recent additions like AJAX, jQuery, LINQ, MVC, and the Microsoft web platform. The presentation aims to provide an overview of Microsoft web technologies and how they can help developers build web applications.
This document discusses a visit made to the website of ACME Car Rental, a leading travel services company in Malaysia. It provides details about ACME's history and services. The document also answers questions about how the website is developed and maintained. Key tools used include WebMatrix, ASP.NET, CSS, JavaScript, and Microsoft SQL Server. Security features implemented on the server include regular patching and password protection for changes. The website content is kept up-to-date through regular updates, response to feedback, and checking email regularly.
This document provides an overview of key web development technologies including HTML, CSS, JavaScript, PHP, MySQL, and ReactJS. It describes what each technology is used for and basic syntax or implementation. HTML is used to define the structure and content of web pages. CSS is used to style and lay out elements on web pages. JavaScript can enhance interactivity, AJAX, and is used widely with front-end frameworks. PHP is a server-side scripting language often used for dynamic content and forms. MySQL is a relational database used to store and retrieve user and application data. ReactJS is a popular JavaScript library that uses reusable components to build user interfaces.
The document discusses various vulnerabilities in web servers and web applications. It covers popular web servers like IIS, Apache, and others. It then discusses attacking vulnerabilities in web servers like sample files, source code disclosure, canonicalization, and buffer overflows. It also discusses vulnerabilities in web applications like cross-site scripting, SQL injection, cross-site request forgery, and HTTP response splitting. It provides examples of exploits and recommendations for countermeasures to secure web servers and applications.
The document summarizes an Active Server Pages workshop that teaches ASP scripting using VBScript. The 5-part, day-long workshop covers:
1) Introduction to ASP and setting up development environments
2) ASP scripting basics using VBScript, including variables, forms, and string/array manipulation
3) Additional ASP scripting concepts using VBScript
4) Integrating ASP components
5) Using ASP Data Objects (ADO) components
The instructor has 6 years of web development experience and will use demonstrations and hands-on exercises for attendees to practice the concepts.
This document provides an introduction and overview of CodeIgniter, an open source PHP web application framework. It outlines the prerequisites of OOP, PHP and MySQL. It then covers the installation of CodeIgniter including Apache, PHP and MySQL. The core components of CodeIgniter are explained - the MVC architecture with Controllers, Views and Models. CodeIgniter libraries, helpers and the application flow are also summarized. Lastly, some example lab work topics are listed such as database selection, CRUD operations and file uploads.
This document provides an overview of various web technologies including HTML, CSS, JavaScript, PHP, and databases. It defines each technology, provides examples of code, and lists some common uses. It also includes links to additional resources for further information on each topic. The document is intended as an introductory guide to foundational web development languages and tools.
Similar to Ch10 Hacking Web Servers http://ouo.io/2Bt7X (20)
Learning spark ch01 - Introduction to Data Analysis with Sparkphanleson
Learning spark ch01 - Introduction to Data Analysis with Spark
References to Spark Course
Course : Introduction to Big Data with Apache Spark : http://ouo.io/Mqc8L5
Course : Spark Fundamentals I : http://ouo.io/eiuoV
Course : Functional Programming Principles in Scala : http://ouo.io/rh4vv
Firewall - Network Defense in Depth Firewallsphanleson
This document discusses key concepts related to network defense in depth. It defines common terms like firewalls, DMZs, IDS, and VPNs. It also covers techniques for packet filtering, application inspection, network address translation, and virtual private networks. The goal of defense in depth is to implement multiple layers of security and not rely on any single mechanism.
This document discusses wireless security and protocols such as WEP, WPA, and 802.11i. It describes weaknesses in WEP such as vulnerabilities in the RC4 encryption algorithm that allow attacks like dictionary attacks. It introduces WPA as an improvement over WEP that uses stronger encryption keys, protocols like TKIP that change keys dynamically, and AES encryption in 802.11i as stronger alternatives. It also discusses authentication methods like 802.1X that distribute unique keys to each user to address issues with shared keys in WEP.
Authentication in wireless - Security in Wireless Protocolsphanleson
The document discusses authentication protocols for wireless devices. It begins by describing the authentication problem and some basic client-server protocols. It then introduces the challenge-response protocol which aims to prevent replay attacks by including a random number in the response. However, this protocol is still vulnerable to man-in-the-middle and reflection attacks. The document proposes improvements like including an identifier in the hashed response to prevent message manipulation attacks. Overall, the document provides an overview of authentication challenges for wireless devices and the development of challenge-response protocols to address these issues.
HBase In Action - Chapter 04: HBase table designphanleson
HBase In Action - Chapter 04: HBase table design
Learning HBase, Real-time Access to Your Big Data, Data Manipulation at Scale, Big Data, Text Mining, HBase, Deploying HBase
HBase In Action - Chapter 10 - Operationsphanleson
HBase In Action - Chapter 10: Operations
Learning HBase, Real-time Access to Your Big Data, Data Manipulation at Scale, Big Data, Text Mining, HBase, Deploying HBase
Hbase in action - Chapter 09: Deploying HBasephanleson
Hbase in action - Chapter 09: Deploying HBase
Learning HBase, Real-time Access to Your Big Data, Data Manipulation at Scale, Big Data, Text Mining, HBase, Deploying HBase
This chapter discusses Spark Streaming and provides an overview of its key concepts. It describes the architecture and abstractions in Spark Streaming including transformations on data streams. It also covers input sources, output operations, fault tolerance mechanisms, and performance considerations for Spark Streaming applications. The chapter concludes by noting how knowledge from Spark can be applied to streaming and real-time applications.
This chapter discusses Spark SQL, which allows querying Spark data with SQL. It covers initializing Spark SQL, loading data from sources like Hive, Parquet, JSON and RDDs, caching data, writing UDFs, and performance tuning. The JDBC server allows sharing cached tables and queries between programs. SchemaRDDs returned by queries or loaded from data represent the data structure that SQL queries operate on.
Learning spark ch07 - Running on a Clusterphanleson
This chapter discusses running Spark applications on a cluster. It describes Spark's runtime architecture with a driver program and executor processes. It also covers options for deploying Spark, including the standalone cluster manager, Hadoop YARN, Apache Mesos, and Amazon EC2. The chapter provides guidance on configuring resources, packaging code, and choosing a cluster manager based on needs.
This chapter introduces advanced Spark programming features such as accumulators, broadcast variables, working on a per-partition basis, piping to external programs, and numeric RDD operations. It discusses how accumulators aggregate information across partitions, broadcast variables efficiently distribute large read-only values, and how to optimize these processes. It also covers running custom code on each partition, interfacing with other programs, and built-in numeric RDD functionality. The chapter aims to expand on core Spark concepts and functionality.
Learning spark ch05 - Loading and Saving Your Dataphanleson
The document discusses various file formats and methods for loading and saving data in Spark, including text files, JSON, CSV, SequenceFiles, object files, and Hadoop input/output formats. It provides examples of loading and saving each of these file types in Python, Scala, and Java code. The examples demonstrate how to read data from files into RDDs and DataFrames and how to write RDD data out to files in the various formats.
Learning spark ch04 - Working with Key/Value Pairsphanleson
Learning spark ch04 - Working with Key/Value Pairs
Course : Introduction to Big Data with Apache Spark : http://ouo.io/Mqc8L5
Course : Spark Fundamentals I : http://ouo.io/eiuoV
Course : Functional Programming Principles in Scala : http://ouo.io/rh4vv
Learning spark ch01 - Introduction to Data Analysis with Sparkphanleson
Learning spark ch01 - Introduction to Data Analysis with Spark
References to Spark Course
Course : Introduction to Big Data with Apache Spark : http://ouo.io/Mqc8L5
Course : Spark Fundamentals I : http://ouo.io/eiuoV
Course : Functional Programming Principles in Scala : http://ouo.io/rh4vv
XML FOR DUMMIES
The document is a chapter from the book "XML for Dummies" that introduces XML. It discusses what XML is, including that it is a markup language and is flexible for exchanging data. It also examines common uses of XML such as classifying information, enforcing rules on data, and outputting information in different ways. Additionally, it clarifies what XML is not, namely that it is not just for web pages, not a database, and not a programming language. The chapter concludes by discussing how to build an XML document using editors that facilitate markup and enforce document rules.
This document discusses the differences between HTML, XML, and XHTML. It covers how XHTML combines the structure of XML with the familiar tags of HTML. Key points include:
- HTML was designed for displaying web pages, XML for data exchange, and XHTML uses HTML tags with XML syntax.
- XML allows custom tags, separates content from presentation, and is self-describing, while HTML focuses on display.
- Converting to XHTML requires following XML syntax rules like closing all tags, using empty element syntax, proper nesting, and lowercase tags and attribute quotes.
বাংলাদেশের অর্থনৈতিক সমীক্ষা ২০২৪ [Bangladesh Economic Review 2024 Bangla.pdf] কম্পিউটার , ট্যাব ও স্মার্ট ফোন ভার্সন সহ সম্পূর্ণ বাংলা ই-বুক বা pdf বই " সুচিপত্র ...বুকমার্ক মেনু 🔖 ও হাইপার লিংক মেনু 📝👆 যুক্ত ..
আমাদের সবার জন্য খুব খুব গুরুত্বপূর্ণ একটি বই ..বিসিএস, ব্যাংক, ইউনিভার্সিটি ভর্তি ও যে কোন প্রতিযোগিতা মূলক পরীক্ষার জন্য এর খুব ইম্পরট্যান্ট একটি বিষয় ...তাছাড়া বাংলাদেশের সাম্প্রতিক যে কোন ডাটা বা তথ্য এই বইতে পাবেন ...
তাই একজন নাগরিক হিসাবে এই তথ্য গুলো আপনার জানা প্রয়োজন ...।
বিসিএস ও ব্যাংক এর লিখিত পরীক্ষা ...+এছাড়া মাধ্যমিক ও উচ্চমাধ্যমিকের স্টুডেন্টদের জন্য অনেক কাজে আসবে ...
How to Make a Field Mandatory in Odoo 17Celine George
In Odoo, making a field required can be done through both Python code and XML views. When you set the required attribute to True in Python code, it makes the field required across all views where it's used. Conversely, when you set the required attribute in XML views, it makes the field required only in the context of that particular view.
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In this webinar, participants learned how to utilize Generative AI to streamline operations and elevate member engagement. Amazon Web Service experts provided a customer specific use cases and dived into low/no-code tools that are quick and easy to deploy through Amazon Web Service (AWS.)
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Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
3. Web Server
IIS or Apache
HTTPS
HTTP
Client’s
Browser
Internet
Explorer
or Firefox
3
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4. Web Servers
The two main Web servers are Apache
(Open source) and IIS (Microsoft)
Image from netcraft.com (link Ch 10c) 4
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5. Understanding Web
Applications
It is nearly impossible to write a program
without bugs
Some bugs create security vulnerabilities
Web applications also have bugs
Web applications have a larger user base
than standalone applications
Bugs are a bigger problem for Web
applications
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6. Web Application Components
Static Web pages
Created using HTML
Dynamic Web pages
Need special components
<form> tags
Common Gateway Interface (CGI) scripts
Active Server Pages (ASP)
PHP
ColdFusion
Scripting languages like JavaScript
ODBC (Open Database connector) 6
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7. Web Forms
Use the <form> element or tag in an HTML
document
Allows customer to submit information to the
Web server
Web servers process information from a
Web form by using a Web application
Easy way for attackers to intercept data
that users submit to a Web server
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8. Web Forms (continued)
Web form example
<html><body>
<form>
Enter your username:
<input type="text" name="username">
<br>
Enter your password:
<input type="text" name="password">
</form></body></html>
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10. Web Server
CGI Scripts
HTTPS
HTTP
Client’s
Browser
HTML Forms
JavaScript
10
11. Common Gateway Interface
(CGI)
Handles moving data from a Web server
to a Web browser
The majority of dynamic Web pages are
created with CGI and scripting languages
Describes how a Web server passes
data to a Web browser
Relies on Perl or another scripting language
to create dynamic Web pages
11
12. CGI Languages
CGI programs can be written in different
programming and scripting languages
C or C++
Perl
Unix shell scripting
Visual Basic
FORTRAN
12
13. Common Gateway Interface
(CGI) (continued)
CGI example
Written in Perl
Hello.pl
Should be placed in the cgi-bin directory on
the Web server
#!/usr/bin/perl
print "Content-type: text/htmlnn";
print "Hello Security Testers!";
13
14. Another CGI Example
Link Ch 10a: Sam’s Feedback Form
Link Ch 10b: CGI Script in Perl that
processes the data from the form
14
15. Active Server Pages (ASP)
Microsoft’s server-side script engine
HTML pages are static—always the same
ASP creates HTML pages as needed. They
are not static
ASP uses scripting languages such as
JScript or VBScript
Not all Web servers support ASP
IIS supports ASP
Apache doesn’t support ASP as well
15
16. Active Server Pages (ASP)
You can’t see
the source of
an ASP page
from a
browser
This makes it
harder to hack
into, although
not impossible
ASP examples
at links
Ch 10d, e, f 16
17. Apache Web Server
Apache is the most popular Web Server
program
Advantages
Stable and reliable
Works on just about any *NIX and Windows
platform
It is free and open source
See links Ch 10g, 10h
17
19. PHP: Hypertext Processor (PHP)
Enables Web developers to create
dynamic Web pages
Similar to ASP
Open-source server-side scripting
language
Can be embedded in an HTML Web page
using PHP tags <?php and ?>
Users cannot see PHP code in their Web browser
Used primarily on UNIX systems
Also supported on Macintosh and Microsoft
platforms 19
21. ColdFusion
Server-side scripting language used to
develop dynamic Web pages
Created by the Allaire Corporation
Purchased by Macromedia, now owned by
Adobe -- Expensive
Uses its own proprietary tags written in
ColdFusion Markup Language (CFML)
CFML Web applications can contain other
technologies, such as HTML or JavaScript
21
24. VBScript
Visual Basic Script is a scripting language
developed by Microsoft
You can insert VBScript commands into a
static HTML page to make it dynamic
Provides the power of a full programming
language
Executed by the client’s browser
24
28. JavaScript Example
<html><head>
<script type="text/javascript">
function chastise_user(){
alert("So, you like breaking rules?")
document.getElementByld("cmdButton").focus(
)}
</script></head>
<body><h3>Don't click the button!</h3>
<form>
<input type="button" value="Don't Click!"
name="cmdButton"
onClick="chastise_user()" />
</form></body></html>
See link Ch 10v – works in IE and Firefox
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30. ODBC or
Web Server OLE DB
Database
Apache or IIS Or ADO
SQL Server or
HTML Forms
Oracle or
CGI Scripts
MySQL
HTTP or HTTPS
Client’s Browser
30
31. Connecting to Databases
Web pages can display information stored
on databases
There are several technologies used to
connect databases with Web applications
Technology depends on the OS used
ODBC
OLE DB
ADO
Theory is the same
31
32. Open Database Connectivity
(ODBC)
Standard database access method
developed by the SQL Access Group
ODBC interface allows an application to
access
Data stored in a database management
system (DBMS)
Can use Oracle, SQL, or any DBMS that
understands and can issue ODBC commands
Interoperability among back-end DBMS is
a key feature of the ODBC interface 32
33. Open Database Connectivity
(ODBC) (continued)
ODBC defines
Standardized representation of data types
A library of ODBC functions
Standard methods of connecting to and
logging on to a DBMS
33
34. OLE DB and ADO
Object Linking and Embedding Database
(OLE DB) and
ActiveX Data Objects (ADO)
These two more modern, complex
technologies replace ODBC and make
up"Microsoft’s Universal Data Access“
See link Ch 10x
34
35. Understanding Web Application
Vulnerabilities
Many platforms and programming
languages can be used to design a Web
site
Application security is as important as
network security
35
36. Attackers controlling a Web server
can
Deface the Web site
Destroy or steal company’s data
Gain control of user accounts
Perform secondary attacks from the Web site
Gain root access to other applications or
servers
36
37. Open Web Application Security
Project (OWASP)
Open, not-for-profit organization dedicated to
finding and fighting vulnerabilities in Web
applications
Publishes the Ten Most Critical Web
Application Security Vulnerabilities
37
38. Top-10 Web application
vulnerabilities
Unvalidated parameters
HTTP requests from browsers that are not
validated by the Web server
Inserted form fields, cookies, headers, etc.
(See link Ch 10y)
Broken access control
Developers implement access controls but fail
to test them properly
For example, letting an authenticated user read
another user’s files
38
39. Top-10 Web application
vulnerabilities (continued)
Broken account and session management
Enables attackers to compromise passwords or
session cookies to gain access to accounts
Cross-site scripting (XSS) flaws
Attackers inject code into a web page, such as a
forum or guestbook
When others user view the page, confidential
information is stolen
See link Ch 10za
Buffer overflows
It is possible for an attacker to use C or C++ code that
includes a buffer overflow
39
40. Top-10 Web application
vulnerabilities (continued)
Command injection flaws
An attacker can embed malicious code and run a
program on the database server
Example: SQL Injection
Error-handling problems
Error messages may reveal information that an
attacker can use
Insecure use of cryptography
Storing keys, certificates, and passwords on a Web
server can be dangerous
40
41. Top-10 Web application
vulnerabilities (continued)
Remote administration flaws
Attacker can gain access to the Web server
through the remote administration interface
Web and application server
misconfiguration
Any Web server software out of the box is
usually vulnerable to attack
Default accounts and passwords
Overly informative error messages
41
42. Application Vulnerabilities
Countermeasures (continued)
WebGoat project
Helps security testers learn how to perform
vulnerabilities testing on Web applications
Developed by OWASP
It’s like HackThisSite without the helpful
forum
Tutorials for WebGoat are being made, but
they aren’t yet ready
42
43. Assessing Web Applications
Issues to consider
Dynamic Web pages
Connection to a backend database server
User authentication
What platform was used?
43
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44. Does the Web Application Use
Dynamic Web Pages?
Static Web pages do not create a secure
environment
IIS attack example: Directory Traversal
Adding .. to a URL refers to a directory above
the Web page directory
Early versions of IIS filtered out , but not
%c1%9c, which is a Unicode version of the
same character
See link Ch 10 zh
44
45. Connection to a Backend
Database Server
Security testers should check for the
possibility of SQL injection being used to
attack the system
SQL injection involves the attacker
supplying SQL commands on a Web
application field
45
46. SQL Injection Example
HTML form collects name and pw
SQL then uses those fields:
SELECT * FROM customer
WHERE username = ‘name' AND password = ‘pw'
If a hacker enters a name of
’ OR 1=1 --
The SQL becomes:
SELECT * FROM customer
WHERE username = ‘’ OR 1=1 --' AND password
= ‘pw‘
Which is always true, and returns all the records
46
48. Connection to a Backend
Database Server
Basic testing should look for
Whether you can enter text with punctuation
marks
Whether you can enter a single quotation
mark followed by any SQL keywords
Whether you can get any sort of database
error when attempting to inject SQL
48
49. User Authentication
Many Web applications require another
server to authenticate users
Examine how information is passed
between the two servers
Encrypted channels
Verify that logon and password
information is stored on secure places
Authentication servers introduce a second
target
49
50. What Platform Was Used?
Popular platforms include:
IIS with ASP and SQL Server (Microsoft)
Linux, Apache, MySQL, and PHP (LAMP)
Footprinting is used to find out the
platform
The more you know about a system the
easier it is to gather information about its
vulnerabilities
50
51. Tools of Web Attackers and
Security Testers
Choose the right tools for the job
Attackers look for tools that enable them
to attack the system
They choose their tools based on the
vulnerabilities found on a target system or
application
51
52. Web Tools
Cgiscan.c: CGI scanning tool
Written in C in 1999 by Bronc Buster
Tool for searching Web sites for CGI scripts
that can be exploited
One of the best tools for scanning the Web for
systems with CGI vulnerabilities
See link Ch 10zi
52
54. Web Tools (continued)
Phfscan.c
Written to scan Web sites looking for hosts
that could be exploited by the PHF bug
The PHF bug enables an attacker to
download the victim’s /etc/passwd file
It also allows attackers to run programs on the
victim’s Web server by using a particular URL
See links Ch 10zj, 10 zk
54
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55. Web Tools (continued)
Wfetch: GUI tool from Microsoft
Displays information that is not normally
shown in a browser, such as HTTP headers
It also attempts authentication using
Multiple HTTP methods
Configuration of host name and TCP port
HTTP 1.0 and HTTP 1.1 support
Anonymous, Basic, NTLM, Kerberos, Digest, and
Negotiation authentication types
Multiple connection types
Proxy support
Client-certificate support
See link Ch 10zl 55
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