Securing Web Applications

Matthew Hughes is a pen tester, coder, blogger, and security consultant who gave a talk on web application security. The talk covered common attacks like XSS, SQL injection, and XSRF. It emphasized that most websites are insecure, secure coding is difficult, and security breaches can be very costly. The talk provided examples of vulnerabilities, encouraged responsible disclosure of issues found, and stressed the importance of defense in depth for security.

The document discusses cross-site scripting (XSS) vulnerabilities. It defines XSS as allowing malicious scripts to be served to users from a vulnerable website. There are different types of XSS vulnerabilities including those without storage and with storage of malicious scripts on the website. The document provides examples of XSS vulnerabilities and discusses how they can be used to steal user credentials and track users. It also outlines challenges in preventing XSS vulnerabilities.

The document discusses various web application security issues like SQL injection, input validation, cross-site scripting and provides recommendations to prevent these vulnerabilities when developing PHP applications. It emphasizes the importance of validating all user inputs, using prepared statements and output encoding to prevent code injection attacks and ensuring session security. The document also covers other attacks like cross-site request forgery and provides mitigation techniques.

The document discusses cross-site tracing (XST), a new web security attack technique that can bypass the HTTP-only security mechanism in Internet Explorer 6 SP1. XST uses the HTTP TRACE request method to echo back request headers, including authentication cookies, allowing an attacker to access credentials from any site. The document provides background on the TRACE method and how it is enabled by default on many web servers. It also explains the HTTP-only cookie option that aims to prevent access to cookies via JavaScript but is circumvented by XST.

Introduction Impact of XSS attacks Types of XSS attacks Detection of XSS attacks Prevention of XSS attacks At client side At Server-side Conclusion References

Cross-Site Scripting (XSS) is a security vulnerability that allows malicious code to be injected into web pages viewed by other users. There are three main types of XSS attacks: non-persistent reflects the user's input back without filtering; persistent stores the input and displays it later to other users; and DOM-based exploits vulnerabilities in client-side scripts. XSS attacks are used to hijack user accounts, steal cookies, and conduct phishing scams. Developers can prevent XSS by sanitizing all user input, using encoding on untrusted fields, and keeping software updated.

- Owasp AppSec Research 2010 - Over the past year, clickjacking received extensive media coverage. News portals and security forums have been overloaded by posts claiming clickjacking to be the upcoming security threat. In a clickjacking attack, a malicious page is constructed (or a benign page is hijacked) to trick the user into performing unintended clicks that are advantageous for the attacker, such as propagating a web worm, stealing confidential information or abusing of the user session. This presentation introduces a novel solution we designed and implemented for an automated detection of clickjacking attacks on web-pages. The presentation details the architecture of our detection and testing system and it presents the results we obtained from the analysis of over a million "possibly malicious" Internet pages.

This document discusses cross-site scripting (XSS) vulnerabilities. It covers the business risks of XSS, including account compromise and malware installation. It explains how XSS works by giving an example of a reflected XSS attack. It then discusses different XSS attack points and variations. The document outlines mitigation techniques like output encoding and content security policies. It provides examples of how these defenses work to prevent XSS exploits. Finally, it discusses tools like the OWASP XSS prevention cheat sheet and upcoming security training sessions.

This document discusses cross-site scripting (XSS) attacks. It defines XSS as an attack where malicious scripts are injected into otherwise trusted websites. The document outlines three types of XSS attacks and provides examples of real-world XSS worms. It explains how to exploit stored, reflected, and DOM-based XSS vulnerabilities. Finally, it recommends ways to prevent XSS, including input and output filtering, encoding output, and using mitigations like HttpOnly cookies and content security policies.

This presentation is from Null/OWASP/G4H November Bangalore MeetUp 2014. technology.inmobi.com/events/null-owasp-g4h-november-meetup Talk Outline:- A) Reflective-(Non-Persistent Cross-site Scripting) - What is Reflective Cross-site scripting. - Testing for Reflected Cross site scripting How to Test - Black Box testing - Bypass XSS filters - Gray Box testing Tools Defending Against Reflective Cross-site scripting. Examples of Reflective Cross-Site Scripting Attacks. B) Stored -(Persistent Cross-site Scripting) What is Stored Cross-site scripting. How to Test - Black Box testing - Gray Box testing Tools Defending Against Stored Cross-site scripting. Examples of Stored Cross-Site Scripting Attacks.

After my successful presentation "Testing iOS Apps without Jailbreak in 2018" it's time to change the side. This talk will cover the most important milestones in reaching secure iOS/macOS apps. I'm going to show you how to develop modern&secure iOS/macOS apps using new security features presented on WWDC2018. H4ckers will be satisfied as well since I'm going to talk about these steps from pentester's perspective. What's more - this presentation will include vulnerabilities that I found during my professional work and my vulnz found in real Apple's apps! (That I haven't disclosed yet!)

Cross-site scripting (XSS) allows malicious code injection into web applications. There are three types of XSS vulnerabilities: non-persistent, persistent, and DOM-based. To avoid XSS, developers should eliminate scripts, secure cookies, validate input, and filter/escape output. Proper coding practices can help prevent XSS attacks.

A talk about attacks against SSL that have been uncovered in the last 3-4 years. This talk delves into about what exactly was attacked and how it was attacked and how SSL is still a pretty useful piece of technology. This was given at null Bangalore April Meeting.

This document discusses cross-site scripting (XSS) attacks against mobile applications. It defines XSS as a type of injection where malicious scripts are injected into trusted websites. The document describes three types of XSS attacks - reflected XSS, stored XSS, and DOM-based XSS. It provides examples of each type of attack and how attackers are able to execute scripts on a victim's machine by injecting code. The document concludes with recommendations for preventing XSS attacks, including validating all input data, encoding all output data, and setting the proper character encoding.

A full course of what is Cross-Site Scripting, how it affects us, how we can protect against XSS, etc.

Cross Site Scripting (XSS) is a vulnerability that allows malicious users to insert client-side code into web pages that is then executed by a user's browser. This code can steal cookies, access private information, perform actions on the user's behalf, and redirect them to malicious websites. XSS works by having the server display input containing malicious JavaScript from a request. There are different types of XSS attacks, including non-persistent, persistent, and DOM-based attacks. Prevention methods include validating, sanitizing, and escaping all user input on the server-side and client-side. Web vulnerability scanners like Burp Suite can help test for XSS and other vulnerabilities.

Cross site scripting (XSS) is a type of computer security vulnerability typically found in web applications, but in proposing defensive measures for cross site scripting the websites validate the user input and determine if they are vulnerable to cross site scripting. The major considerations are input validation and output sanitization. There are lots of defense techniques introduced nowadays and even though the coding methods used by developers are evolving to counter attack cross site scripting techniques, still the security threat persist in many web applications for the following reasons: • The complexity of implementing the codes or methods. • Non-existence of input data validation and output sanitization in all input fields of the application. • Lack of knowledge in identifying hidden XSS issues etc. This proposed project report will briefly discuss what cross site scripting is and highlight the security features and defense techniques that can help against this widely versatile attack.

Media Center for Windows Vista gives you new ways of delivering compelling entertainment to the Digital Home. In this technical session, learn how to create rich, engaging content and services for the home, using DHTML, Windows Presentation Foundation, and the new Windows Media Center Presentation Layer

Come see a detailed tour of Microsoft's powerful new standards-based tool for Web designers. Get the inside scoop from an Expression Web Designer product team expert and join leading designer Lynda Wienman (founder of lynda.com and FlashForward) in a tour that shows how Expression Web Designer is the new champ of standards-based Web design.

The document discusses principles for designing rich interactions on Web 2.0 platforms. It outlines three key principles: 1) prefer direct, lightweight, in-page interactions, 2) provide invitations beforehand, transitions during and feedback after interactions, and 3) think in objects and tie information to interactivity. Various interaction patterns are provided as examples for each principle, such as inline editing, drag and drop, and multi-variate views.

Hear how ASP.NET AJAX 4.0 makes building pure client-side AJAX Web applications even easier, and watch us build an entire data-driven ASP.NET AJAX application from start to finish by taking advantage of only JavaScript, HTML pages, and Windows Communication Foundation (WCF) services. Also learn about new ASP.NET AJAX features including the DataView control, declarative templates, live client-side data binding, WCF, and REST integration.

Easter is a holiday celebrated with colored eggs, which children hunt for and find in baskets along with other treats while wearing new bonnets. It also involves decorating with lilies and attending church services while remembering the resurrection of Jesus Christ.

This session discusses the business aspects of Microsoft Silverlight, including how to ramp up an agency to be ready for Silverlight and how to pitch Silverlight to your clients. Learn how to optimize current workflow, ramp up a team, and achieve a return on Silverlight investments. Learn how the differences between Silverlight 1.0 and 2 affect business and staffing strategy.

Community Server is an open source ASP.NET platform for building interactive online communities. It provides a high performance and feature-rich system with modules for blogs, forums, files, photos, profiles and more. The multi-tier architecture separates the data, business logic and presentation tiers for flexibility and performance. Community Server offers different licensing options from an express edition to commercial editions to encourage adoption for both non-profit and commercial use cases.

Mary Magdalene was the first witness of the Resurrection according to the Gospel of John. She arrived at Jesus' tomb alone on Easter morning and found it empty. Upon seeing the risen Jesus, now in the form of a gardener, she recognized him and called him by name. As the first person to see the risen Christ, Mary Magdalene is given a unique role in the Gospel accounts as the primary witness of the Resurrection.

Beyond IFrames:Web Sandboxes discusses a new approach called Web Sandbox that isolates and secures boundaries between trusted and untrusted content via composite host-defined security policies. It builds on existing knowledge and embraces existing programming patterns to provide browser equalization while securing user data and personal information as applications get richer through aggregation. The Web Sandbox uses a virtual machine and transformation process to execute untrusted code securely according to specified policies without redefining the web's security model. It allows sites to properly model and enforce trust relationships to protect themselves and users.

A live hacking session demonstrating the different tools and techniques used by hackers and an in-depth understanding of the problems of insecure application and the solutions to solve the vulnerability.

This document discusses Internet Explorer security and deployment strategies for Internet Explorer 8. It provides a brief history of Internet Explorer versions and their new security features. It then covers specific IE8 security enhancements like XSS filtering, clickjacking defenses, and SmartScreen filtering. The document also discusses centralized management using Group Policy and customizing IE8 deployment with IEAK. It concludes with recommendations for upgrading users and sites from older IE versions to IE8.

The document summarizes a presentation about discovering a design issue in .NET's handling of view state fields without integrity protection. During a web application assessment in 2012, the presenter found that custom serialization of view state into an unprotected field could allow tampering by modifying the serialized object graph. This led to the realization that known .NET deserialization behaviors could be triggered remotely by manipulating the view state. A proof-of-concept exploited this by generating view state containing a FileInfo object that deleted a file on the server when deserialized. This uncovered a remote code execution vulnerability in some ASP.NET applications.

The document discusses various cybersecurity topics including vulnerabilities, threats, attacks, and countermeasures. It provides an overview of the Open Web Application Security Project (OWASP) which focuses on improving application security. It also summarizes common web vulnerabilities like cross-site scripting (XSS), SQL injection, buffer overflows, and cross-site request forgery (CSRF). Recommendations are given to prevent these vulnerabilities.

I'm take picture from here and there by goggling not mentioning all source please let me know if anyone has any objection. This presentation was presented in “securITy” Information Security Conference at BASIS SoftExpo 2012

The document provides an overview of Java web security coding and open source tools that can be used for testing web application security. It discusses topics like SQL injection, cross-site scripting, web application scanners like Skipfish and WebScarab, and the importance of logging and error handling. Code examples are provided for tasks like logging in Java, using Log4j, and handling SQL injection vulnerabilities. Live sites and vulnerable applications like Hackme Books and HacmeBank are also referenced to demonstrate security issues.

The document discusses various techniques for hacking client-side insecurities, including discovering clients on the internet and intranet, attacking client-side through JavaScript jacking and pluggable protocol handlers, exploiting cross-site request forgery vulnerabilities, and fingerprinting clients through analysis of HTTP headers and browser information leaks. The presentation aims to demonstrate these hacking techniques through examples and a question/answer session.

Caleb Sima is the founder and CTO of SPI Dynamics, a security company. He has over 11 years of experience in security and is a frequent speaker on topics like exploiting web security vulnerabilities and hacking web applications. The document discusses various web application vulnerabilities like SQL injection, cross-site scripting, and session hijacking, and provides examples of exploiting these vulnerabilities on real websites.

This document outlines an agenda and topics for a presentation on building Windows Phone 7 apps with Silverlight, including: - An overview of the Silverlight development experience and supported controls for Windows Phone - Demos of using common controls like the WebBrowser and AppBar, and tasks for launching other apps and picking data - Details on navigation between pages, app lifecycle handling, and data storage options - A section for questions and answers The presentation aims to provide guidance and code examples for core aspects of building Windows Phone apps with the Silverlight framework.

A free application security class delivered by world renowned experts: Eoin Keary and Jim Manico. This class has been delivered to over 1000 people in 2014 alone.

JavaScript is the most widely used language cross platforms. This talk will analyze the security concerns from past to present with a peek to the future of this important language. This talk was presented as Keynote at CyberCamp Espana 2014.

The document discusses detecting and defending against security vulnerabilities in Web 2.0 applications. It begins by outlining the top security issues in Web 1.0 vs Web 2.0 applications. Examples of vulnerabilities in Web 2.0 like cross-site scripting and JSON poisoning are provided. Strategies for detection include using security tools and custom security testing. Defense techniques include secure coding practices and security testing. The document emphasizes learning about security vulnerabilities and limitations of detection and defense.

The document discusses detecting and defending against security vulnerabilities in Web 2.0 applications. It begins by outlining the top security issues in Web 1.0 vs Web 2.0 applications. Examples of vulnerabilities in Web 2.0 like cross-site scripting and injection flaws are provided. The document then demonstrates how to use security tools to detect vulnerabilities in a sample Web 2.0 application. Lastly, it discusses strategies for developing securely and testing applications, along with lessons learned from security findings.

The document discusses four main problems with the traditional approach to application security: 1. Security testing creates an asymmetric arms race between testers and attackers. Traditional end-of-cycle penetration tests only provide minimal security. 2. Applications often incorporate outsourced, open source, or third party code that may contain vulnerabilities. Dependency issues are rarely tested. 3. It is difficult to manage vulnerabilities at scale across a large number of applications and reports from different testers. 4. Security issues overwhelm developers with too much information, creating "white noise" and prioritizing compliance over risk. Contextualizing risk is important.

Electron is a framework to create the desktop application on Windows,OS X, Linux easily, and it has been used to develop the popular applications such as Atom Editor, Visual Studio Code, and Slack. Although Electron includes Chromium and node.js and allow the web application developers to be able to develop the desktop application with accustomed methods, it contains a lot of security problems such as it allows arbitrary code execution if even one DOM-based XSS exist in the application. In fact, a lot of vulnerabilities which is able to load arbitrary code in applications made with Electron have been detected and reported. In this talk, I focus on organize and understand the security problems which tend to occur on development using Electron. --- Yosuke Hasegawa Secure Sky Technology Inc, Technical Adviser. Known for finding numerous vulnerablities in Internet Explorer、Mozilla Firefox and other web applications.He has also presented at Black Hat Japan 2008, South Korea POC 2008, 2010 and others. OWASP Kansai Chapter Leader, OWASP Japan Board member.

I'm take picture from here and there by goggling not mentioning all source please let me know if anyone has any objection.

XSS (cross-site scripting) is a client-side vulnerability that allows injection of malicious JavaScript which can then be run on a victim's browser. The document discusses different types of XSS (non-persistent, persistent, DOM-based), examples of how to perform basic and advanced XSS attacks, ways XSS has been used on major websites, and how attackers can exploit XSS vulnerabilities for activities like session hijacking, cookie stealing, clickjacking, and more.

XSS (cross-site scripting) is a client-side vulnerability that allows injection of malicious JavaScript which can then be run on a victim's browser. The document discusses different types of XSS (non-persistent, persistent, DOM-based), examples of how to perform basic and advanced XSS attacks, ways XSS has been used on major websites, and how attackers can exploit XSS vulnerabilities for activities like session hijacking, cookie stealing, clickjacking, and more.

This document provides an overview of web application penetration testing. It discusses the goals of testing to evaluate security by simulating attacks. The testing process involves gathering information, understanding normal application behavior, and then applying targeted techniques to find weaknesses. The document outlines the reconnaissance, mapping, and active testing phases. It also demonstrates various tools like Burp Suite, W3AF, and SQL injection and cross-site scripting attacks.

The document provides information about Easter traditions and symbols. It discusses that Easter is celebrated on the first Sunday after the first full moon after March 21st and commemorates Jesus' resurrection. Common Easter symbols mentioned include eggs, bunnies, lambs, and crosses which represent new life, spring, and Jesus. The document also includes Easter jokes, riddles, poems, and tongue twisters.

This newsletter from the Asian Indian Christian Church discusses the Lenten season and upcoming church services. The pastor's letter encourages readers to observe Lent by giving up negative habits and focusing on spiritual growth. It provides suggestions for how to improve oneself, such as giving up complaining and focusing on others' good qualities instead. The newsletter also announces the Saturday Bible study series on faith and upcoming Holy Week and Easter services.

This document provides information about church services and events taking place at Holy Trinity Church in Brussels for the week of March 22nd, 2009. It includes details about Sunday services, Bible readings and prayers for the week, notices about upcoming Easter services and events, and announcements regarding church life and the local community.

This document provides the mass and confession schedule for St. Mary's Cathedral Church in Newcastle upon Tyne for March and April 2009. It includes the regular daily and Sunday mass times. It also highlights special services and masses during Holy Week and Easter, including Palm Sunday, Maundy Thursday, Good Friday, Holy Saturday, and Easter Sunday masses. The ordination of Bishop Seamus Cunningham on March 20th is also noted.

The document contains the swimming pool schedule for two weeks. In the first week, the large pool and small pool have general swim times on weekdays from 7:30-9:30am, 10am-12pm, 2-4pm, and 5-7pm. Fun swim with inflatables or beach parties is from 2-3pm. The second week has similar swim times but is over the Easter holiday with some sessions closed or having different times.

This document provides information about the Holy Week and Easter services at a church. It describes the events that will take place each day, from Palm Sunday through Easter Sunday, including pancake breakfasts, morning prayers, Holy Eucharist services, Taizé services, Tenebrae services, foot washing on Maundy Thursday, Good Friday Stations of the Cross, and the Easter Vigil. The purpose is to walk with parishioners through the full Holy Week journey from Jesus' triumphant entry to Jerusalem to his resurrection.

The pastor describes an interesting experience during a Good Friday Stations of the Cross walk. As the group stopped to pray outside a known crack house, some of the residents came out. The pastor engaged one man and invited him to join, which he did. More people from the area started gathering as they saw the cross. At another station, the leader of the house approached concerned but calmed down when the pastor explained what they were doing. The pastor invited him to keep walking but he had a job interview and said he may come to Easter services instead.

This document provides information about Lenten programs and events at the Swarthmore Presbyterian Church. It lists the schedule for Ash Wednesday worship services, lectures and discussions with a visiting theologian Amy-Jill Levine from March 27-29. It also advertises Lenten devotional materials and notes office hours. Sundays in Lent and Holy Week services leading up to Easter Sunday on April 12 are detailed, including Palm Sunday, Maundy Thursday, Good Friday, and Easter Sunday worship opportunities.

Easter services for several churches in Melbourne are listed, including dates for Palm Sunday, Maundy Thursday, Good Friday and Easter Day in 2009. The Baptist, Catholic, Methodist and United Reformed churches provide details of their Easter services and events, including times for masses, family services and musical performances. The document encourages people to attend any of the warmly welcoming services held by churches celebrating Easter together in Melbourne.