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I’ve been doing the local usergroup circuit with this lately and have been asked to write it up.
In some ways this is old news, but in other ways…well, I think few realize how absolutely devastating and omnipresent this vulnerability can be. It is an attack vector available in every application I’ve ever seen that takes user input and allows administrators to bulk export to CSV.
That is just about every application.
Edit: Credit where due, I’ve been pointed to this article from 2014 by an actual security pro which discusses some of these vectors . And another one .Edit:
So let’s set the scene - imagine a time or ticket tracking app. Users enter their time (or tickets) but cannot view those of other users. A site administrator then comes along and exports entries to a csv file, opening it up in a spreadsheet application. Pretty standard stuff.
So we all know csv files. Their defining characteristic is that they are simple. These exports might look like this
Simple enough. Nothing dangerous there. Heck the even states:
CSV files contain passive text data that should not pose any risks.
So even by specification, it should all be fine.
Hey, just for fun let’s try something, let’s modify our CSV file to the following
Huh…well that’s odd. Even though that cell was quoted it seems to have been interpreted as a formula just because the first character was an
symbol. In fact - in Excel at least - any of the symbols
will trigger this behavior causing lots of fun times for adminstrators whose data just doesn’t seem to format correctly (this is actually what brought my attention first to the issue). That’s strange, but not downright
Well hold on, a formula is code that executes. So a user can cause code - even if its only formula code - to execute on an administrator’s machine in their user’s security context.
What if we change our csv file to this then? (Note the Description column on the last line)
What’s going to happen when we open up in Excel?
Yup, that’s right, the system calculator opens right on up.
Now to be fair, there is absolutely a warning . It’s just that the warning is a big block of text, which nobody is going to read. And even if they do, it explicitly recommends:
- Apr. 3rd 2018 1:30 pm ET
Electric vehicle startup NIOis emerging as a serious competitor in the EV space and illustrating that, the company opened its first service center right next to Tesla’s inBeijing as it’s about to deliver its first cars.
China’s demand for SUVs is increasing rapidly and it is extending to electric SUVs, which made Tesla’s Model X a very popular vehicle in the country despite its higher price due to import duties slapped on all of Tesla’s vehicles.
Now NIO, which is emerging as one of the most well-funded new Chinese EV startups, is bringing its first production vehicle to market, the NIO ES8, a cheaper all-electric SUV to try to capture some of that demand for electric SUVs.
They are about to deliver their firstNIO ES8 vehicles and they are opening their first service right next to Tesla’s inBeijing.
Here’s a gallery of images of the new facility (via JayinShanghai):
When NIO first launched theES8, theysaid that the vehicle isa full size 7-seater electric SUV with a 70 kWh battery pack enabling 355 km (220 miles) of NEDC-rated range, which should result in closer to 200 miles of real-world range.
The first 10,000 ES8 vehicles will be the “Founder Edition” with a starting price of RMB 548,000 (~$83,000 USD) before incentives.
But the price of those“Founder Edition” vehicles doesn’t matter much since NIO claims that they are already all sold out.
The standard ES8 starts at RMB 448,000 (~$68,000 USD) or RMB 375,400 ($57,000) after govt. incentives, which represents roughly half the price of the Tesla Model X in China.
But NIO also offers a battery renting structure, similar to Renault’s ZOE battery scheme, which lowers the upfront price of the vehicle to RMB 275,400 (~$42,000 USD).
The battery renting fee is not cheap at RMB 1,280 (~$2o0 USD) per month, but it also gives owner access to a battery swap system to get more range quickly.
We will follow the rollout and early customer response to theES8. If you are in line to get one or you know someone whois, let us know.
Fred is the Editor in Chief and Main Writer at Electrek.
You can send tips on Twitter (DMs open) or via email: [email protected]
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