Exploiting java deserialization vulnerabilities in crypto contexts - a java applet case-study

[RedTimmy Security <redazione () segfault it>]

Hi,

regardless of being a deprecated technology, there are still many legacy applications relying on java applets out 
there. A bit of time ago we were involved in an atypical web application penetration test.

The difficulty consisted in the fact that the java serialized payload responsible for triggerring the vulnerability was 
located inside the authenticated part of a digital certificate, signed client-side with a private key stored in a HSM 
module.

In case you are interested, the full story is here: 
https://www.redtimmy.com/web-application-hacking/how-we-invented-enumjavalibs-while-finding-a-java-deserialization-bug-and-achieving-rce/

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