XML Entity Cheatsheet - Updated

An XML Entity testing cheatsheet. This is an updated version with nokogiri tests removed, just XXE notes. XML Declarations: 1 2 | ---|--- Vanilla entity test: 1 | &post ---|--- SYSTEM entity test xxe: 1 | ---|--- Parameter Entity. One of the benefits is a paremeter entity is automatically expande...

ruby: REXML billion laughs attack via parameter entity expansion

The REXML parser in Ruby 1.9.x before 1.9.3-p550, 2.0.x before 2.0.0-p594, and 2.1.x before 2.1.4 allows remote attackers to cause a denial of service memory consumption via a crafted XML document, aka an XML Entity Expansion XEE attack...

XML Entity Cheatsheet

An XML Entity testing cheatsheet. Testing was done using an older vulnerable version of nokogiri. In IRB you can require previous versions of gems. Certain techniques e.g. XInclude may require additional settings in Nokogiri. XML Headers: 1 2 | ---|--- Vanilla entity test: 1 | ---|--- SYSTEM enti...

XML Entity Cheatsheet

An XML Entity testing cheatsheet. Testing was done using an older vulnerable version of nokogiri. In IRB you can require previous versions of gems. Certain techniques e.g. XInclude may require additional settings in Nokogiri. XML Headers: 1 2 | ---|--- Vanilla entity test: 1 | &post ---|--- SYSTE...