I must confess that when I first heard about SCADA-related security issues, the first thing that came to my mind was some of the hype about the Millenium bug. It just seemed a bit too convenient that the people highlighting the issues were the people selling solutions to combat it. (SCADA refers to Supervisory Control and Data Acquisition, proprietary computer control networks used in a lot of industry, such as utilities and chemical plants, etc., etc.)
But Y2K was not all smoke, of course. In addition to providing a key trigger for the Indian consultancies, it prompted a lot of thinking about IT security, and some of it is relevant to SCADA. And we need to take this to the next level of depth.
If you saw Bruce Willis in Die Hard 4.0, you saw the bad guys hijack a lot of SCADA networks in order to generate pyrotechnics and chances for the hero to get out of DC. My understanding is that this is not at all realistic (What? A Hollywood action movie not realistic?) But we need to have this vetted.
My preliminary understanding of this is that security was not built into them when they were implemented and that organisations have been slow to build them in after the fact. As some of the functionality of SCADA networks migrated onto WANS and the Internet, network owners did not build in normal security protocols to protect from snooping, hacking and the same viruses and worms that bedevil all Internet users.
How correct is this preliminary understanding?
My casual reading of the literature suggests that precautions have been advised since 1999, that groups exist to highlight best practice and stimulate awareness of SCADA security issues, and that the problem is not so dire as to require the services of balding Yank action heroes.
Am I living in a dream world? Digital Bond, a security consultancy, would probably have you think so. This article in the August 22 issue of Forbes, the American business magazine, also expresses a level of concern that goes far beyond my preliminary assessment, talking about a successful penetration of a nuclear power plant’s SCADA network. IT Security expert Bruce Schneier wrote that he didn’t think SCADA was as much of a problem now as it would be in future, but in the same blog post he linked to a March 2007 story that detailed a serious hole found in the U.S. national infrastructure. I read this shortly after I blithely wrote on the Blindside wiki that I thought the maximum impact from SCADA issues was in the present, while solutions were being developed but adopted unevenly.
So which is it? Am I living in a dream world and ignoring a serious threat? Is SCADA security being over-egged by security vendors? Is the problem going to get worse?
We could use a little help on this one, folks.
Here’s what we wrote on the wiki.