Cachetalk is a proof-of-concept program that is able to read and write arbitrary bits using HTTP server-side caching.
It was released as part of the In Plain Sight: The Perfect Exfiltration talk given at Hack In The Box Amsterdam 2016 conference by Itzik Kotler and Amit Klein from SafeBreach Labs.
Slides are availble here
0.1.0
Cachetalk requires Python 2.7.x to run.
$ git clone https://github.com/SafeBreach-Labs/cachetalk.git
$ cd cachetalk
$ python cachetalk.py -hBSD 3-Clause