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iPhone denial-of-service bug surfaces

updated 11:25 am EST, Thu February 7, 2008

iPhone DoS surfaces

An exploit for Apple's iPhone has surfaced that can crash the device when unsuspecting users visit a maliciously crafted Web page. SecurityFocus notes that successful attacks cause a kernel panic, crashing the iPhone which could ultimately lead to remote code execution. The firm states that iPhone firmware version 1.1.2 and 1.1.3 are both affected, and suggest that other versions may also be vulnerable.

Apple Mobile Safari 0 is vulnerable to the denial-of-service attack, which results from a failure to handle exceptional conditions. The security hole is currently unpatched, leaving iPhone owners vulnerable to potential attacks until Apple issues a security update.

by MacNN Staff





  1. WiseWeasel

    Joined: Dec 1969



    Yaaaay, proper exploit for 1.1.3, here we come!

  1. jhawk95

    Joined: Dec 1969


    The Sky Is Falling!!!!!

    The Sky is Falling! The Sky is Falling!!

    Here we go again! IF you visit a site, and IF you puch the one key and the off button at the same time, and IF you stand on your head and shout "I'm the kinkg of the world"..... then someone might take over your iPhone.

    Give us a site where this happens and tell us how many people have been affected by this or SHUT UP already!

  1. ViktorCode

    Joined: Dec 1969


    old stuff

    We've seen this stuff on 24 of January, first time the bug was discovered. The only news is "security experts" somehow got their hands on a locked iPhone, patched it to 1.1.3 and confirmed the bug works there as well.

    Just don't ask them why they couldn't provide a proof of concept exploit that is actually able to take over iPhone, not crash it.

  1. Feathers

    Joined: Dec 1969


    maliciously crafted...

    Just exactly what kind of pages are "maliciously crafted" as if we didn't know! If you choose to trawl the underbelly of the internet you're bound to find something unpleasant. It's classic parental advice..."Stay on the well lit streets"! I'm guessing the material found on such web-sites looks pretty good on the iPhone's screen. Does touching work?

  1. ajhoughton

    Joined: Dec 1969


    not a denial of service

    A denial of service is an ongoing attack that "denies service"; i.e. it prevents you from using something until the attack ceases. This does not do that, and it is therefore not a denial of service. It is a crash.

    "DoS" may *sound* cool, but it shouldn't be applied willy-nilly.

  1. Robb

    Joined: Dec 1969


    good to know...

    This article is actually pretty straight forward; DOS bug that can cause your iPhone to crash when visiting a malicious site, currently un-patched. No hype. No sensationalism. We've seen worse reporting.

  1. testudo

    Joined: Dec 1969


    Re: not a DOS

    A denial of service is an ongoing attack that "denies service"; i.e. it prevents you from using something until the attack ceases. This does not do that, and it is therefore not a denial of service. It is a crash.

    Actually, that's just one way to create a Denial of Service. By definition, a DOS attack/exploit is just that, an attack/exploit that makes the device unresponsive.

    The classic way is to pound a system with network traffic so valid traffic is unable to get through. But you can also create a DOS scenario by causing a computer to eat up CPU cycles, or just crash the system. If you've ever had a runaway process that makes the whole system virtually unusable, that's a DOS (though it may not be an attack).

    By crashing the phone (or computer, server, car, etc), you are, in affect, denying service of the device.

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