This Blog Is Not For Reading

A blog, just like any blog, only more so

  • Subscribe

  • Categories

  • RSS Bob Jonkman’s Microblog

    • Favorite 29 August 2020
      bobjonkman favorited something by eloquence: Disturbing reports that Google Play is threatening to kick out Mastodon apps. See:https://mastodon.social/@Gargron/104763960269049818https://toot.fedilab.app/@fedilab/104765191594914330App stores have a track record of acting capriciously & are also easy targets for gov't censors (including Trump). This is why alternatives like @fdroidorg are so important for user freedom.If unfamiliar: F-Droid is a free & open […]
    • bobjonkman repeated a notice by eloquence 29 August 2020
      RT @eloquence Disturbing reports that Google Play is threatening to kick out Mastodon apps. See:https://mastodon.social/@Gargron/104763960269049818https://toot.fedilab.app/@fedilab/104765191594914330App stores have a track record of acting capriciously & are also easy targets for gov't censors (including Trump). This is why alternatives like @fdroidorg are so important for user freedom.If unfamiliar: F-Droid is a free & open source app you […]
    • New note by bobjonkman 25 August 2020
      I do like the taste of onion bagels. When the other bagels in the bag acquire an onion flavour it's a poor experience at best, almost certainly leading to the purchase of a *real* onion bagel. #AOBFS #AcquiredOnionBagelFlavourSyndrome
    • bobjonkman repeated a notice by lnxw48a1 25 August 2020
      RT @lnxw48a1 @bobjonkman @blacksam Would that still be true if you actually liked onion bagels? Asking because, although I don't eat bagels at all, it seems to me that you're probably unusually sensitive to the flavor of onion ... which would likely be the case if you disliked that flavor.
    • New note by bobjonkman 24 August 2020
      If there is one onion bagel in a bag of bagels, they're *all* onion bagels...
    • bobjonkman repeated a notice by blacksam 24 August 2020
      RT @blacksam How come no matter what flavor bagel you buy from the bakery, it's always, to some extent, an onion bagel? #bagels #onions #wtf
    • Favorite 24 August 2020
      bobjonkman favorited something by blacksam: How come no matter what flavor bagel you buy from the bakery, it's always, to some extent, an onion bagel? #bagels #onions #wtf
    • Favorite 24 August 2020
      bobjonkman favorited something by lnxw48a1: #TIL: Gravity keyhole https://en.wikipedia.org/wiki/Gravitational_keyhole and Roche limit https://en.wikipedia.org/wiki/Roche_limit
    • Favorite 31 May 2020
      bobjonkman favorited something by atarifrosch: @bobjonkman: Das habe ich heute bekommen, wiederum 2 Monate später …
    • bobjonkman repeated a notice by fsf 24 May 2020
      RT @fsf Remote education has provided an unfortunate opportunity for privacy-invading proprietary software to invade students' lives. Learn how many people are fighting back: https://u.fsf.org/32h

Archive for November, 2010

What to do about compromised Hotmail passwords

Posted by Bob Jonkman on 18th November 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.

Tags: , , , , , , , , , , , ,
Posted in email, Internet, spam | 1 Comment »

 
Better Tag Cloud