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LastPass autofill exploit

labs.detectify.com

21–30 of 443 posts

Re: LastPass autofill exploit

#21
post #11

People trusting a third party for their passwords boggles my mind.

Perhaps, but this particular exploit doesn't target the fact your passwords are stored in the cloud.

It targets the local autofill functionality in the browser, so it could conceivably have occurred in any password manager with browser/autofill integration. Including those that use a local password store.

Re: LastPass autofill exploit

#22
post #13

I've been using LastPass for about 3 years, and now I'm seriously thinking about all the times people told me about how storing passwords in someone else's cloud is bad. I've been defending LastPass and recommending it to everyone till today. Now I'm thinking about how I might have to 'pay' for a software vulnerability in some private (read:unauditable by me) code. All the comments about offline, local backups make s…

The post does point out that this would not work if multifactor authentication is on. I would never dream of using my LastPass account without that anyway.

Like with all decisions this is balancing risk/reward. The reward are all the points you have already expressed that I also love about LastPass. Currently I believe the risk is fairly minimal assuming you use 2 factor-authentication. Though I might turn off autofill now as an extra precaution.

Re: LastPass autofill exploit

#23
post #12

Please correct me if I am mistaken, but couldn't this have been implemented into an iframe that when ran could send the passwords to another remote server? If so, I am a little taken back by LastPass only offering $1,000 to the researcher that found and reported it for fixing. He or she could have taken a different path and resulted in this being used in some complex targeted attack against tech corporations via shor…

Yes, my thoughts exactly. He could had made 100x that money on the black market, so no wonder we still have problems with 0days traded there.

How long would you work for $1,000? Some days, a week, two? If you spend more than a week on this problem it seems not worth to report it... On the other hand, if you set the incentive for bug bounty too high I imagine all sorts of cranks pop up, that want to show off bugs that are not there, and resources will be bound to this task -- they have to be verified, and analyzed even if its a bogus report (and in the worst case it will not accomplish anything).

Where is the middle ground?

Re: LastPass autofill exploit

#25
post #13

I've been using LastPass for about 3 years, and now I'm seriously thinking about all the times people told me about how storing passwords in someone else's cloud is bad. I've been defending LastPass and recommending it to everyone till today. Now I'm thinking about how I might have to 'pay' for a software vulnerability in some private (read:unauditable by me) code. All the comments about offline, local backups make s…

I'd say some of the points could be easily covered by something like KeePass which, unlike cloud, doesn't have to depend on questionable security of third-party services.

For example. I use KeePass to store all my password. I keep my KeePass database in Google Drive, so any change to the file will be updated. because of that I can use KeePass on any machine that has access to Google Drive (I also keep executables for various systems in drive). Furthermore, there are number of free mobile applications for KeePass which can hook into GDrive and you can use KeePass on the phone too. And lastly - browser extensions which let you use your KeePass to automatically fill & save passwords (I don't use it, though).

Sure, KeePass requires a bit more of an effort compared to all-in-one solutions such as LastPass. That is the price you pay for not thinking about possible security breaches in the cloud.

Re: LastPass autofill exploit

#26
post #13

I've been using LastPass for about 3 years, and now I'm seriously thinking about all the times people told me about how storing passwords in someone else's cloud is bad. I've been defending LastPass and recommending it to everyone till today. Now I'm thinking about how I might have to 'pay' for a software vulnerability in some private (read:unauditable by me) code. All the comments about offline, local backups make s…

I do not use LastPass exactly because of what you describe. I use a KeePass Password safe without autofill. I use other software to sync the file. It used to be Dropbox, later I was using BitTorrent Sync, but what tool sync shouldn't really matter. As I see it: the tool only gets to see and sync an encrypted file. You could even use a USB stick and not sync at all. Or only sync on LANs. I love it how I get to decide…

Similar here, also using KeePass. Fairly happy to sacrifice some of the usability for more control and less "cloud".

Re: LastPass autofill exploit

#27
post #12

Please correct me if I am mistaken, but couldn't this have been implemented into an iframe that when ran could send the passwords to another remote server? If so, I am a little taken back by LastPass only offering $1,000 to the researcher that found and reported it for fixing. He or she could have taken a different path and resulted in this being used in some complex targeted attack against tech corporations via shor…

Seems like LastPass' bounty program is a joke. Their max reward is $1,000.

https://bugcrowd.com/lastpass

Re: LastPass autofill exploit

#28
post #13

I've been using LastPass for about 3 years, and now I'm seriously thinking about all the times people told me about how storing passwords in someone else's cloud is bad. I've been defending LastPass and recommending it to everyone till today. Now I'm thinking about how I might have to 'pay' for a software vulnerability in some private (read:unauditable by me) code. All the comments about offline, local backups make s…

> I've been using LastPass for about 3 years, and now I'm seriously thinking about all the times people told me about how storing passwords in someone else's cloud is bad.

This bug doesn't seem to have anything to do with the cloud.

FTA:

> The bug that allowed me to extract passwords was found in the autofill functionality.

Re: LastPass autofill exploit

#29
post #12

Please correct me if I am mistaken, but couldn't this have been implemented into an iframe that when ran could send the passwords to another remote server? If so, I am a little taken back by LastPass only offering $1,000 to the researcher that found and reported it for fixing. He or she could have taken a different path and resulted in this being used in some complex targeted attack against tech corporations via shor…

At the time I submitted this, they didn't even have a bug bounty. Considering that, I think $1,000 is great :)

Re: LastPass autofill exploit

#30
post #23
post #12

Please correct me if I am mistaken, but couldn't this have been implemented into an iframe that when ran could send the passwords to another remote server? If so, I am a little taken back by LastPass only offering $1,000 to the researcher that found and reported it for fixing. He or she could have taken a different path and resulted in this being used in some complex targeted attack against tech corporations via shor…

Yes, my thoughts exactly. He could had made 100x that money on the black market, so no wonder we still have problems with 0days traded there. How long would you work for $1,000? Some days, a week, two? If you spend more than a week on this problem it seems not worth to report it... On the other hand, if you set the incentive for bug bounty too high I imagine all sorts of cranks pop up, that want to show off bugs that…

"You agree not to disclose the full amount awarded you as part of this bug bounty award contract."
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