Collaborate Disseminate
I have a bug where a Java SAXReader with validation set to false reads XML I partially control.
The reader gets supplied this:
<event>[DATA I CONTROL]</event>
I can put whatever I want in [DATA I CONTROL], t… Continue reading XXE inside an XML element?
I was testing the website example.com and found a form vulnerable to XML Injection. It send the details you insert into that form as xml attachment via email to my email address and also to administrators CMS as email. It wor… Continue reading How can i turn this xml injection into a valid XXE?
What i want to do is access the Content-type header which is placed under the Access-Control-Allow-Headers header as i want to attempt to change json to xml on a web application im working on to check if its vulnerable to XML… Continue reading Bypassing Access-Control-Allow-Headers header
If you Google for an example of XXE injection you get something like this:
<?xml version=”1.0″ encoding=”ISO-8859-1″?>
<!DOCTYPE foo [
<!ELEMENT foo ANY >
<!ENTITY xxe SYSTEM “file:///dev/random” … Continue reading XML External Entity injection within the body of a document
I’ve been studying XXE attacks through Portswigger’s Web Security Academy. I stumbled upon a lab Exploiting blind XXE to exfiltrate data using a malicious external DTD.
In this lab an attacker has to define an entity within XML request to … Continue reading What’s the use of an "extra" dynamic declaration in an external DTD blind XXE attack?
How would you read a large file by exploiting an XXE OOB vulnerability through HTTP? The file is very large and exceeds the limit of the URL (2048 characters). Any ideas?
Most of examples for extracting files through XXE OOB (Out of Band) sets up a listening HTTP server and listens to incoming request on the URL requested. However, since the URL length is limited to something like 2048, how would you extrac… Continue reading XXE OOB Large File Extraction
I’ve been reading up on XXE Injection, and so far every example I’ve seen has involved a webserver voluntarily loading xml external entities (as below).
<?php
libxml_disable_entity_loader (false);
$xmlfile = file_get_co… Continue reading Why Would A Web Server Allow Loading XML External Entities?
Multiple cross-site scripting (XSS) bugs and an XML external entity (XXE) problem opens the door to takeover of admin desktops. Continue reading Microsoft Management Console Bugs Allow Windows Takeover
Hi all Im trying to understand how the billion laughs attack works(https://en.wikipedia.org/wiki/Billion_laughs_attack)
So far I get its obviously sending this payload:
<?xml version=”1.0″?>
<!DOCTYPE lolz [
<… Continue reading Billion Laughs Attack (XXE) – how does it work