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Ask HN: Google Doc email virus?

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Re: Ask HN: Google Doc email virus?

#151

Earlier quoted context omitted.

Passwords for authentication was just always a flawed idea, typing them into the DOM and sending them over the wire even more so.

I agree. However I have yet to see a better alternative. Are there any out there?

A technical alternative, yes, something like SRP. A usable alternative that is actually universally supported, well, no not really.

Re: Ask HN: Google Doc email virus?

#152

Earlier quoted context omitted.

I agree. However I have yet to see a better alternative. Are there any out there?

Absolutely! My favorite is usually referred to as passwordless authentication, and generally means that when a user gives you their email address/SMS/etc, you send a login link to their device. Here's an article: https://medium.com/@ninjudd/passwords-are-obsolete-9ed56d483...

Most people today authenticate their email account by typing their password into the DOM and sending it over the wire. It puts a ton of pressure on email providers to be secure. I consider my email password the absolute most important piece of information I have.

So although I do agree with you (and have created sites in the past that do passwordless login), the general password problem doesn't really get solved with this approach.

Re: Ask HN: Google Doc email virus?

#153
post #9

EDIT: According to a Google representative on the reddit thread, this application is now blocked. If your account was affected, you no longer need to do anything. If you fell for this, changing your password is not the right solution - you want to log into your google account and remove permissions from the application. https://myaccount.google.com/permissions?pli=1 should show a list of apps connected to your accoun…

> If your account was affected, you no longer need to do anything. How do you figure? An unknown actor presumably had full access to your email inbox for a non-zero amount of time and the proper remediation is "nothing"? If I was concerned this had affected me I would right now be changing my passwords to ____everything____.

Well change the passwords to everything except the google account that was compromised. I don't think you can recover the password of a google account through its own gmail inbox.

Although I guess if you had a circular recovery chain of this google account depending on a different email that depended on this google account, the attacker could use your email to recover the other email then use the other email to recover this google account. So it might be wise to change the passwords to everything.

Re: Ask HN: Google Doc email virus?

#154

Earlier quoted context omitted.

I agree. However I have yet to see a better alternative. Are there any out there?

Absolutely! My favorite is usually referred to as passwordless authentication, and generally means that when a user gives you their email address/SMS/etc, you send a login link to their device. Here's an article: https://medium.com/@ninjudd/passwords-are-obsolete-9ed56d483...

I really like that approach, but it's just shifting where a password is required, not eliminating it.

Re: Ask HN: Google Doc email virus?

#155
post #132
post #123

Earlier quoted context omitted.

It's really a question of how malicious the author was- if they set it up to download everything attached to the account as soon as it connected, it could still cause a lot of damage.

Even worst: The hacker could have taken a list of lets say the top 1000 banking (or any type of online service) websites accross the globe. The moment the hacker get access to your gmail account, he initiatite a password recovery request on each of those 1000 websites, get the password reset link from the email, reset the password, delete the email. he could now have access to any other online account you have that h…

Safe to assume that google could track such activity for affected accounts and notify if that was widespread?

(or is that somehow against the 'only our anonymized ad display program can scan your email' privacy policy?)

Re: Ask HN: Google Doc email virus?

#156
post #105

Earlier quoted context omitted.

> Each box has a 50 email limit (FIFO) which was immediately overwhelmed. That makes me think the malicious author didn't expect this to spread as wide as it did.

It's my guess that Mailinator is extremely irrelevant to their plan. They planned to propagate via BCC but they needed a "To:" address - preferably one that didn't bounce. So they hit the "h" key awhile, then added @mailinator.com

Why didn't they just send the email to the recipient? What does the BCC add in this context?

Re: Ask HN: Google Doc email virus?

#157

I reported this attack vector to Google back in 2012. They awarded a modest bounty, and then a few months later I heard this: > "We're deploying some abuse detection and reactive measures to deal with impostors that might try to abuse this sort of attack. Given this, we do not intend to perform validation that the URL matches the branding information." That last part was in reference to one of my proposed mitigations…

This was particularly effective because the app was registered as "Google Docs" - to not even filter names of your own products out seems ripe picking for imposter apps.

Nah... they can just say "Free unsubscribe service" or "Free ". And people will click like crazy. And you can make actually make VC fundable business using that technique.

Re: Ask HN: Google Doc email virus?

#158

Mailinator here: Yes, we sent the inbox to a blackhole but keep in mind, Mailinator does not and can not actually "Send" any email. It's a receive-only service. As always, any email "from" @mailinator.com has had it's reply-to forged (which is pretty trivial). Also - even before we blackholed the email, it's unlikely any email in that inbox (i.e. hhhh..) was read. Each box has a 50 email limit (FIFO) which was immedi…

I don't see a TXT record for _dmarc.mailinator.com. If you created a DMARC reject policy all the major webmail providers would block messages "from" mailinator.com

Re: Ask HN: Google Doc email virus?

#159
The bad thing about centralized internet is it makes some mail servers much juicer targets than the decentralized mail servers of old.

I decided gmail wasn't for me when I read they harvested your emails for ads. 1GB in 2004 sounded so enticing too!

If you are technically savvy and have access to a static IP, I highly recommend setting up postfix/dovecot and registering a domain. It's fairly straight forward for technical people. You can have it setup, soup to nuts in an hour or two. There's online docs everywhere.

It's probably not going to be as secure as a gmail, but it's a much smaller target. Most internet providers will give you a static for an extra $5 or so.

Re: Ask HN: Google Doc email virus?

#160

Earlier quoted context omitted.

It's my guess that Mailinator is extremely irrelevant to their plan. They planned to propagate via BCC but they needed a "To:" address - preferably one that didn't bounce. So they hit the "h" key awhile, then added @mailinator.com

Why didn't they just send the email to the recipient? What does the BCC add in this context?

BCC recipients can't see (or contact) each other to mitigate the spread. If you look at the source code, it BCCs 99 contacts from the infected account per message.
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