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    • bobjonkman repeated a notice by lxo 28 October 2021
      RT @lxo funny thing, when I read stuff aloud, it's like DMA, it doesn't go through the CPU, and I can't recall what I've heard. I only retain what I read if I read it quietly
    • Favorite 28 October 2021
      bobjonkman favorited something by lxo: funny thing, when I read stuff aloud, it's like DMA, it doesn't go through the CPU, and I can't recall what I've heard. I only retain what I read if I read it quietly
    • New note by bobjonkman 26 October 2021
      Even with mass-energy equivalency, it is much easier to change mass into energy than the other way around. But as far as changing an object's *weight* by pressing a button, that should be possible. Weight is dependent on both on the mass and distance separating two (or more) objects, or the acceleration of an object. […]
    • bobjonkman repeated a notice by lxo 26 October 2021
      RT @lxo nah, it was entirely fictional AFAIK. Eureka was the fictional city of genius inventors in the series. no amount of internal motors could enable a ball to dynamically change its weight. though mass is energy, in day-to-day life you can most often assume it's conserved, which is why I found it so creative […]
    • Favorite 26 October 2021
      bobjonkman favorited something by lxo: nah, it was entirely fictional AFAIK. Eureka was the fictional city of genius inventors in the series. no amount of internal motors could enable a ball to dynamically change its weight. though mass is energy, in day-to-day life you can most often assume it's conserved, which is why I found […]
    • New note by bobjonkman 14 October 2021
      But this year it'll be different!
    • New note by bobjonkman 14 October 2021
      15 years?!? The Toronto Maple Leafs haven't won a Stanley Cup since 1967!
    • bobjonkman repeated a notice by hypolite 14 October 2021
      RT @hypolite ♲ @mbeisen@twitter.com: because of vaccine mandates we’re losing teachers who don’t believe in science, healthcare workers who don’t believe in medicine, and police who don’t believe in public safety…
    • Favorite 14 October 2021
      bobjonkman favorited something by hypolite: ♲ @mbeisen@twitter.com: because of vaccine mandates we’re losing teachers who don’t believe in science, healthcare workers who don’t believe in medicine, and police who don’t believe in public safety…
    • New note by bobjonkman 25 September 2021
      Maybe they don't have to quarantine, but they're *very very* close!

What to do about compromised Hotmail passwords

Posted by Bob Jonkman on November 18th, 2010

autoroute à emails

autoroute à emails by Biscarotte

I administer a number of e-mail systems, and I’ve been seeing a lot of spam coming from Hotmail accounts recently. And both friends and clients have been telling me that it’s not them who are sending spam from Hotmail (and ending up in my e-mail systems), their accounts have been hacked. One person asked me:

Is it just Hotmail? What else could I use? Can’t I just change my password?

Changing passwords is only an effective solution if the account was compromised by social engineering, eg. the legitimate user giving out the password in a phishing attempt or other direct means, or if a simple password was guessed or cracked.

There is evidence that Hotmail and Yahoo’s password recovery mechanism is flawed (eg. the Sarah Palin breach), so that malusers can acquire a new password for an account. I don’t think this is happening, because victims are not reporting being locked out of their accounts. Of course, if the service merely sends out the current password then this may be what is happening, and no amount of password complexity will protect the account.

If the passwords were compromised by an automated password cracker then I would expect only simple passwords to be breached, and accounts with strong passwords would be safe. I do not know what kind of passwords were in use by the people who have compromised accounts, but it is likely they were simple passwords.

While I have no evidence, I think the current rash of breaches is due to a more systematic attack by URL munging, or fuzzing the inputs on a POST request, or some other attack vector. These attacks do not require an authenticated login, and in that case no amount of password complexity will provide security either.

I haven’t heard of similar compromised accounts in Gmail, so that may be a suitable alternative for now. I’ve been recommending that people use the mail accounts provided by their ISPs, largely so that they can make use of the ISP’s technical support if their accounts do get compromised. And, of course, if they’re paying their ISP for a mail account then there may be immunity from liability (“My mail account was compromised and I was paying my ISP for security, so all this spam is their fault”).

–Bob.

Update 5 Feb 2012: I retract the first sentence in the last paragraph. E-mail Administrator friends have been telling me that Google Mail is just as vulnerable as Hotmail and Yahoo. Having just read “Hacked!” in The Atlantic I’m convinced the problem of compromised mail accounts is worse than I thought, and that no online providers (especially the “free” ones) adequately protect the e-mail of their users.

autoroute à emails by Biscarotte is used under a Creative Commons by-sa-v2.0 license.

 
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