this post was submitted on 21 Jul 2023
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What people don't understand is that satellies don't run traditional OS. They run simple state machine firmares and real-time software. Also, you don't interact with them with something like a command line and general shell commands. So even if a bug or vulnerability were to be found in some library, driver or firmware and it's far from a vector for attack.
A way more plausible way of gaining control is to attack the ground equipment. Anothr method will be learning the command and telemetry dictionary by careful observation of the communication (not trivial, but lets assume possible).
Now you have the problem of what to do with the control. The usual fanciful doomsday scenario is diverting the satellite to hit another one. this is extremely unlikely, manoeuvring satellites isn't like making a car take a turn, it take careful planning and execution. Even then it's not fast, the other satellite operator can see it coming and do a small manoeuver to be able to dodge. On top of all that, lots of nano and small satellites have a very limited propulsion system if at all.
The other alternative is to hurt it's ability to operate, which is a way more easy. But again, there are simpler and easier ways to that - mostly by jamming and disrupting communication.
In conclusion, not that I think cyber security in satellites shouldn't be a thing, but that article, based on an academic study of the code of 3 firmwares from amateur to research level small-sats, doesn't impress me much.
Are you speaking from first hand experience? I don't have experience with commercial satellites, but I can say from direct experience that scientific satellites and other spacecraft absolutely run a (real-time) traditional OS these days (and even a decade ago). That said, we do take serious measures to secure our vehicles. I don't think I want to say any more than that given the nature of the discussion.
I guess I wasn't clear, real time OS absolutely are in use (I just said real-time software). my point was that they aren't the same as what most people know and experience. attacking them isn't like attacking some random IoT device or "hacking" some random server or PC.
In my experience, people don't have a good idea of how satellites operate and articles like this one don't help.
btw, love your username!
I think the worst thing you could do if gaining control of a satellite would be to attempt to use it as a kinetic kill vehicle, after all buildings can't dodge and the trajectory calculation is relatively trivial by todays standards, especially since you can take your time figuring it out long in advance.
This became too long for me to grammar and spell check... apologies in advance.
If you are talking about raining satellites down on earth, rods from god style, than I can assure you the risk is theortic at best.
Lets, as it's said, start from the beginning. In order for a satellite to hit the surface of earth, it has to be big enough, massive enough and dense enough. Not a lot of satellites are in that category. probably non that can be turned into a proper kinetic energy weapon.
Then it needs the right trajectory. Too shallow and the speed fall will be gradual, the satellite will break up to small bits that will, in the worst case, fall out of the sky in their respective terminal velocity. Too steep of a trajectory and it will burn it's self completely.
Now lets say we have the perfect satellite and the perfect trajectory for reaching the target, on top of it being vulnerable to cyber attack. We reach the biggest hurdle - fuel. Satellite don't carry as much as you might think. The stuff is heavy and expensive. Satellites will typically use a lot of their fuel in their initial orbit insertion or will carry only what is needed to keep their said orbit as long as their mission dictates. Why is that important? because big changes in a satellite orbit are very costly in terms of energy, i.e. fuel.
Ok, ok, lets pretend we have a satellite with all the above criteria and has enough fuel. Now we need to make the manoeuver. oops, the satellite engines can't make it in one go. see, satellites use small thrusters to do most of their manoeuvring, as they mostly do station keeping or small orbital changes. So now we're talking about a series of maneuvers in order to carry out the deadly plan. and do it without the original owners getting control back.
But what if it did happen, you ask. Then I have more bad news. The satellite will be tracked, it's trajectory calculated and a warning would be issued. The damage would be light, but will generate lots of headlines.
Radar would be pick that up though and it would get shot down. We aren't blind at that level and it would be a very predictable thing to handle.
This is overall a very low risk scenario which is probably why these vulnerabilities are still on the systems.
This just sounds like a group of college students who think they struck gold when in fact the industry experts they're going for have long addressed these issues.