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Researcher: Hackers Can Jam Traffic By Manipulating Real-Time Traffic Data

An anonymous reader writes "Hackers can influence real-time traffic-flow-analysis systems to make people drive into traffic jams or to keep roads clear in areas where a lot of people use Google or Waze navigation systems, a German researcher demonstrated at BlackHat Europe. 'If, for example, an attacker drives a route and collects the data packets sent to Google, the hacker can replay them later with a modified cookie, platform key and time stamps, Jeske explained in his research paper (PDF). The attack can be intensified by sending several delayed transmissions with different cookies and platform keys, simulating multiple cars, Jeske added. An attacker does not have to drive a route to manipulate data, because Google also accepts data from phones without information from surrounding access points, thus enabling an attacker to influence traffic data worldwide, he added.' 'You don't need special equipment for this and you can manipulate traffic data worldwide,' Jeske said."

27 of 102 comments (clear)

  1. Nothing new by xevioso · · Score: 3, Interesting

    There is nothing new about this. I once worked for a guy who bragged to me that as a kid in new Zealand, one of his first hacking exploits was to get into the Auckland traffic control systems and randomly change all the lights to red. He thought it was hilarious. He was an idiot.

    1. Re:Nothing new by pdabbadabba · · Score: 5, Insightful

      Better than changing them all to green, I suppose.

    2. Re:Nothing new by mlts · · Score: 4, Interesting

      AFAIK, lights have two sets of circuits in them to prevent a change to greens in more than one direction. If it does happen, the light switches to "oh crap" mode and starts flashing yellow or green.

      Of course, I've seen a traffic signal flashing green before all ways, but that was only once.

    3. Re:Nothing new by MightyYar · · Score: 2

      I'm always stunned by how many people cruise right through a disabled traffic light (that is, completely dark).

      --
      W..w..W - Willy Waterloo washes Warren Wiggins who is washing Waldo Woo.
    4. Re:Nothing new by i+kan+reed · · Score: 2

      Yep, any time I see a disabled light, I compulsively have to remind everyone I know that it means a all-way stop sign for the rest of the day. Kind of annoying of me, but I'd rather not see anyone dead(and I've seen some near misses when I was stopped at one before)

    5. Re:Nothing new by tlhIngan · · Score: 5, Informative

      AFAIK, lights have two sets of circuits in them to prevent a change to greens in more than one direction. If it does happen, the light switches to "oh crap" mode and starts flashing yellow or green.

      It's called a Conflict Monitor Unit and it's a required element for traffic lights per law. It basically does as you say - it looks at the outputs and if an invalid one crops up (two greens, say) then it immediately shuts down the traffic light and optionally returns a signal that could notify when this occurs.

      They're a bit more complex than just detecting two greens - they can even monitor things like are the lights cycling properly (green-yellow-red), how long red/yellow/green lights have been on and if red wasn't actually on for some reason.

    6. Re:Nothing new by Cro+Magnon · · Score: 2

      The other day, there was a power outage that caused several traffic lights in my neighborhood to go dark while I was driving with my GF. I uttered a word and she said it was no big deal, just treat it as a 4-way stop, and I said "Yeah, but what about all the idiots who don't know that".

      --
      Slow down, cowboy! It has been 4 hours since you last posted. You must wait another few hours.
    7. Re:Nothing new by Bearhouse · · Score: 2

      'Die Hard' reference, boys & girls...

    8. Re:Nothing new by SpaceMonkies · · Score: 2

      Now that I think about it, in some places, creating a traffic jam is not that hard. Here in Boston, traffic jams happen whenever it snows, whenever it rains, when the sky is clear and the sun is low in the sky (the traffic report calls it "solar glare"), when there's an accident (even in the opposite direction on an interstate highway: "curiosity delays"), whenever there's a Red Sox game or other event at Fenway Park, and when there's road construction. So based on the frequency of traffic jams and the diversity of causes, it does not seem to take much to cause a traffic jam around here. Rural Nebraska might be another story. Now, to use faked traffic data to *prevent* a traffic jam, that would be a truly noteworthy hack!

    9. Re:Nothing new by Runaway1956 · · Score: 2

      This ^

      I always look both ways, to make sure that some fool isn't coming at me 50 mph. I've seen it happen, and there are videos on Youtube. The most recent video I watched, was a guy on a motorcycle running a red light. He went over the car, did a flip, and landed on his feet, looked around for a couple seconds wondering what happened, then collapsed on his broken leg.

      Had that motorcycle been a two ton truck instead, the driver who pulled into the intersection without looking would probably have died.

      --
      "Windows is like the faint smell of piss in a subway: it's there, and there's nothing you can do about it." - Charlie Br
    10. Re:Nothing new by ToddDTaft · · Score: 2

      Signs indicating which road has right-of-way are common in Finland and some of the nearby countries. While it's been a few years since I've driven there, the last time I was in Helsinki, many traffic signals were turned off (as in dark) late at night or on weekends. They also had a number of intersections where there was no Stop or Yield/Give Way signs in any direction. Drivers were expected to know the rules of the road and who had right-of-way.

    11. Re:Nothing new by __aaltlg1547 · · Score: 2

      Actually transactions per second increases as well - the trick of course is that there's an adjustment period. If you take a bunch of people accustomed to being told exactly what to do it may take weeks before they adjust to actually paying attention and figuring things out for themselves on an ongoing basis.

      Who said anything about cars going one at a time? - without any traffic signs you can pack that intersection just as full of cars as will fit - if for example someone is taking a left turn (wide for you non USers) all four incoming paths can also be making right turns simultaneously. And there's no reason the lane he's merging into can't be flowing as well. Even cross-traffic can keep flowing if there are suitable gaps to permit it. Chaotic? Yes, but also efficient so long as everyone is paying attention.

      The problem with it, and the reason that we have traffic signals, is that the success of an unregulated intersection relies on nobody making any mistakes in a complex and confusing situation.

  2. not too surprising by Trepidity · · Score: 4, Insightful

    The integrity of the crowdsourced traffic data depends entirely on trusting the client, in this case the Google-controlled Android software that sends back the data. If you figure out how to replay that, then you can pollute the data.

    1. Re:not too surprising by courteaudotbiz · · Score: 2, Interesting

      Anyways, traffic data is so unreliable, it is a joke. Actual traffic is often the exact opposite as the traffic data I get in my car. I don't know for the US, but in Canada, it is completely useless.

    2. Re:not too surprising by Trepidity · · Score: 2

      Yeah, if they could cross-reference the GPS-reported location with a rough bounding box from the ISP, that could greatly restrict the data spoofing. But I'm not sure how easy that is to do. Do ISPs even have a mechanism where they could report approximate locations of phones in real-time? Is it legal to do so? I know they can go through logs in response to law-enforcement requests, but not sure how real-time that ability is, or whether telecom laws restrict their ability to share the data.

  3. Not a problem. . . by smooth+wombat · · Score: 3, Insightful

    if you don't bother to use these systems.

    Considering the amount of time people spend checking to see which route is preferable, unless that route is at least 10 minutes shorter, there is no significant reason to alter your route.

    The obvious exception being total gridlock, highway construction and the like.

    It's like people who drive around looking for the cheapest gas not understanding they're burning fuel to save that 2 cents per gallon which negates their cost savings.

    --
    We will bankrupt ourselves in the vain search for absolute security. -- Dwight D. Eisenhower
    1. Re:Not a problem. . . by MightyYar · · Score: 2

      What are the odds that they are now or will eventually intentionally take you off the optimal route to view paid for advertising?

      Pretty low, or I'd stop using the app!

      I'm not sure I'd describe my use of the GPS as "blindly", either. The other day it tried to get me to make an illegal turn. Damned if I didn't survive it by, you know, ignoring the bad directions.

      --
      W..w..W - Willy Waterloo washes Warren Wiggins who is washing Waldo Woo.
  4. Traffic Jams? by ArcadeMan · · Score: 2

    Barf: The minute we move in they're gonna spot us on their radar.
    Lone Starr: Nuh-uh.
    Barf: Uh-huh.
    Lone Starr: Nuh-uh.
    Barf: Uh-uh.
    Lone Starr: Nuh-uh. Not if we jam it.
    Barf: Aha! You're right.
    Lone Starr: Down scope.
    Barf: Down scope.
    [puts down a periscope and targets the Spaceball 1's radar dish]
    Barf: Radar about to be "jammed."
    [then, a huge jar of "jam" smashes into the dish]

  5. Apple Data by fermion · · Score: 2

    As Apple says it collects data from iPhone, I wonder how easy it would be to simulate a lot of iphones in a particular area. As it is I find the Apple traffic to be a bit more reliable than Google. I remember two years ago being stuck in traffic jam that Google had told me was perfectly fine, even when I was stuck. Neither service is as reliable as my local traffic monitoring service that has supplements all data with cameras in addition to test cars listing drive times between points of travel.

    --
    "She's a scientist and a lesbian. She's not going to let it slide." Orphan Black
    1. Re:Apple Data by kannibal_klown · · Score: 2

      Anything is better than Sirius. That traffic system is horrible. It will often show me "Green" for a highway even though it's bumper-to-bumper for miles.

      In all of those situations, Google had already refreshed as the red/black criss-cross "DO NOT GO HERE" line

  6. Nice things by jklovanc · · Score: 3, Insightful

    This is another example why we can't have nice things. Some malicious person will find a way to screw it up for no better reason than fun.

  7. It worked! by AndyKron · · Score: 3, Funny

    I want to make a traffic jam in India. Look! It worked!!!

  8. Won't make a difference. by MaWeiTao · · Score: 2

    I can't imagine this would affect many people. Most people stuck in traffic don't have a choice, they're there because it's a part of their daily commute. I check traffic maps on a daily basis, but it's most just to confirm that, yes, it's as bad as it is every other day. I then proceed to go local.

    So the rarer instances where it's handy is if conditions are particularly severe or if there's a jam somewhere you normally wouldn't encounter one. However, even then, there aren't always viable alternatives. Take the New York City area. Unless you can circumvent the region altogether there's no viable alternative, it's all varying degrees of bad.

    Not that urban planners and traffic engineers need the help. Some of the decisions they make leave me wondering if they're mentally disabled or trolling the driving public. A couple of the major avenues across my city have light cycles that pretty much guarantee you're going to be stuck at every red if you're driving at or close to the speed limit. Secondary side streets are given far too much priority. Hackers could only improve things.

  9. Technically interesting, practically useless by dfm3 · · Score: 3, Insightful

    While I found the actual paper to be interesting (the researchers basically describe how they used a packet sniffer to capture data being sent to Google, then examined and reverse engineered the data to figure out exactly what was in the packets and what they could do with it), the idea of actually influencing real world trafic conditions using this method is a bit silly. First, only a very small percentage of drivers actually use live traffic data to make navigation decisions on the fly. Of those, some percentage either won't have an alternate route to choose from, or will simply stick to their route and tough it out. At best, you'd only trick a small percentage of drivers into avoiding a stretch of highway. As for "creating traffic jams", you'd have much better luck if you simply dropped a couple panes of glass off of the back of a truck or did something equally nefarious to cause an accident.

  10. In other news... by Black+Parrot · · Score: 3, Insightful

    assholes can use computers to aid and abet their assholery.

    --
    Sheesh, evil *and* a jerk. -- Jade
  11. Re:Yo Dawg by Kaenneth · · Score: 2

    "Traffic has me on the edge of taking a hostage."

    That way you can use the Carpool lanes.

  12. Depends on where you live by SirGarlon · · Score: 2

    Now that I think about it, in some places, creating a traffic jam is not that hard. Here in Boston, traffic jams happen whenever it snows, whenever it rains, when the sky is clear and the sun is low in the sky (the traffic report calls it "solar glare"), when there's an accident (even in the opposite direction on an interstate highway: "curiosity delays"), whenever there's a Red Sox game or other event at Fenway Park, and when there's road construction. So based on the frequency of traffic jams and the diversity of causes, it does not seem to take much to cause a traffic jam around here. Rural Nebraska might be another story.

    Now, to use faked traffic data to *prevent* a traffic jam, that would be a truly noteworthy hack!

    --
    [Sir Garlon] is the marvellest knight that is now living, for he destroyeth many good knights, for he goeth invisible.