How many times have we thrown a vulnerability over to the development team assuming they understand what the issue is? How many times have we sat with the development team to show them what we do? This isn't a point of showing how to attack to build up the next generation of security people. Instead, it is focused on showing the development team how at attacker looks at their application so they better understand the issue identified. Let's walk through a really simple scenario You have an … [Read more...] about Client vs. Server Validation
app testing
XSS in Script Tag
Cross-site scripting is a pretty common vulnerability, even with many of the new advances in UI frameworks. One of the first things we mention when discussing the vulnerability is to understand the context. Is it HTML, Attribute, JavaScript, etc.? This understanding helps us better understand the types of characters that can be used to expose the vulnerability. In this post, I want to take a quick look at placing data within a <script> tag. In particular, I want to look at how embedded … [Read more...] about XSS in Script Tag
JavaScript in an HREF or SRC Attribute
The anchor (<a>) HTML tag is commonly used to provide a clickable link for a user to navigate to another page. Did you know it is also possible to set the HREF attribute to execute JavaScript. A common technique is to use the onclick event of the anchor tab to execute a JavaScript method when the user clicks the link. However, to stop the browser from actually redirecting the HREF can be set to javascript:void(0);. This cancels the HREF functionality and allows the JavaScript from the … [Read more...] about JavaScript in an HREF or SRC Attribute