04.03.2016 Views

Serial Killer Silently Pwning Your Java Endpoints

asd-f03-serial-killer-silently-pwning-your-java-endpoints

asd-f03-serial-killer-silently-pwning-your-java-endpoints

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

High-Level Gadget Categories<br />

Gadget is a class (within target’s ClassPath) useable upon deserializa@on to facilitate an aEack,<br />

which ojen consists of mul@ple gadgets chained together as a "Gadget Chain".<br />

Trigger Gadget is a class with a "Magic Method" triggered during deserializa@on ac@ng upon<br />

proxy-able fields, which are aEacker controlled (serializable). Trigger Gadgets ini@ate the<br />

execu@on.<br />

Bypass Gadget is a class with (preferably) a "Magic Method" triggered during deserializa@on<br />

which leads to a "Nested Deserializa@on" with an unprotected OIS of aEacker-controllable<br />

bytes.<br />

Helper Gadget is a class with glues together other bonds of a gadget chain.<br />

Abuse Gadget is a class with a method implemen@ng dangerous func@onality, aEackers want<br />

to execute.<br />

Need for serializability is lijed when techniques like XStream are used by the target.<br />

34

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!