What the Fax!?

Presented at DEF CON 26 (2018), Aug. 12, 2018, 3 p.m. (45 minutes).

Unless you've been living under a rock for the past 30 years or so, you probably know what a fax machine is. For decades, fax machines were used worldwide as the main way of electronic document delivery. But this happened in the 1980s. Humanity has since developed far more advanced ways to send digital content, and fax machines are all in the past, right? After all, they should now be nothing more than a glorified museum item. Who on earth is still using fax machines?

The answer, to our great horror, is EVERYONE. State authorities, banks, service providers and many others are still using fax machines, despite their debatable quality and almost non-existent security. In fact, using fax machines is often mandatory and considered a solid and trustworthy method of delivering information.

What the Fax?! We embarked on a journey with the singular goal of disrupting this insane state of affairs. We went to work, determined to show that the common fax machine could be compromised via mere access to its fully exposed and unprotected telephone line -- thus completely bypassing all perimeter security protections and shattering to pieces all modern-day security concepts.

Join us as we take you through the strange world of embedded operating systems, 30-year-old protocols, museum grade compression algorithms, weird extensions and undebuggable environments. See for yourself first-hand as we give a live demonstration of the first ever full fax exploitation, leading to complete control over the entire device as well as the network, using nothing but a standard telephone line.

This talk is intended to be the canary in the coal mine. The technology community cannot sit idly by while this ongoing madness is allowed to continue. The world must stop using FAX!


Presenters:

  • Yaniv Balmas - Security Researcher, Check Point Software Technologies
    Yaniv Balmas is a software engineer and a seasoned professional in the security field. He wrote his very first piece of code in BASIC on the new Commodore-64 he got for his 8th birthday. As a teenager, he spent his time looking for ways to hack computer games and break BBS software. This soon led to diving into more serious programming, and ultimately, the security field where he has been ever since. Yaniv is currently leading the security research group at Check Point Software Technologies where he deals mainly with analyzing malware and vulnerability research. @ynvb
  • Eyal Itkin - Security Researcher, Check Point Software Technologies
    Eyal Itkin is a vulnerability researcher in the Malware and Vulnerability Research group at Check Point Software Technologies. Eyal has an extensive background in security research, that includes years of experience in embedded network devices and protocols, bug bounties from all popular interpreter languages, and an award by Microsoft for his CFG enhancement white paper. When not breaking PTP or I2P, he loves bouldering, swimming, and thinking about the next target for his research. @EyalItkin

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