Blog

Watch Out for UUIDs in Request Parameters

The Plugin: https://github.com/GeoffWalton/UUID-Watcher Some time ago on the TrustedSec Security Podcast, I shared a Burp Suite plugin I developed to hunt Insecure Direct Object Reference (IDOR) issues where applications might be using UUIDs or GUIDs (unique identifiers) as keys, assuming discovery attacks will not be possible. The plugin produces a report that helps identify which...

More Options for Response Modification -With ResponseTinker

As the web application footprint migrates client-side, tools to thoroughly analyze and test client behavior are becoming increasingly important. Burp Suite has made some great strides in this direction with their browser-based enhancements to crawling and scanning, but when it comes time to really dig into the particulars for research, we are still very much...

Fuzzing the Front End!

So, who is testing the client-side components of Single Page Applications (SPAs)? What are you doing exactly, dropping a few cross-site scripting (XSS) polyglots into boxes like you used to do with “<ScRiPt>alert(123)</sCrIpT>” for traditional apps back in 2001?  Are you mostly holding out hope that all big problems will be in the back-end APIs?...

Prepare to Write A Scanner Plugin Before Your Next Platform Test!

BurpSuite is a remarkably extensible platform. While I have written a number of extensions for testing specific applications, as well as more general extensions, one type of extension I had never attempted before was creating my own BurpSuite Scanner plugin. Because modern applications are increasingly difficult to exhaustively test for certain types of issues, I...

Building a “Quick” Lab Environment with Linux Containers

As a penetration tester, I often need to stand up small environments (and sometimes not so small) for a few different reasons—to try things out before making a mess of a client’s production system, to avoid being detected, or to use it simply for our own practice. A lot of us at TrustedSec are remote,...

Ruby ERB Template Injection

Written by Scott White & Geoff Walton Templates are commonly used both client and server-side for many of today’s web applications.  Many template engines are available in several different programming languages.  Some examples are Smarty, Mako, Jinja2, Jade, Velocity, Freemaker, and Twig.  Template injection is a type of injection attack that can have some particularly...