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  1. #1
    subj subj
    Siemens *35 and 45 series phones SMS Danial of Service
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    Siemens *35 and 45 series phones SMS Danial of Service



    Information:

    The name of vulnerability: Siemens *35-45 DoS SMS Lag
    To vulnerability are subject: All versions siemens *35 and *45.
    Official site: www.siemens-mobile.com
    Kind of vulnerability: Refusal in Service (Denial of Service).
    Type of vulnerability: Removed / local.
    Author: subj (r2subj3ct@dwcgr0up.com)
    Date: 02.03.2003
    Site: www.dwcgr0up.com

    Description of vulnerability:

    There is a local and remote vulnerability and
    Siemens *35 and *45 series phones.

    A message of the form "%String", where String is on of the
    languages from the phone language selection menu, will
    completely disable *35 series phones and result
    in a 2 minute read delay on *45 series phones. Note that
    the first letter of language should be capitalized and
    the quotation marks should be present in the message.

    The phone will try to read the message and then after 2 minutes
    return to the main menu. This happens every time the message is sent.
    After 10-15 messages the battery (NiMH) gets empty.

    There is a local vulnerability of the same kind. A message of the
    form "%some_word", where some_word is any lower case letter
    sequence will result in the same effects described above.

    Vulnerability exploiting:

    (for remote):
    We send on "phone - victim" the message:
    "%Deutsch"
    Or
    "%Polski" "%Magyar" "%English" "%Deutsch"
    (for local):
    "testedersecurity"

    Thanks:
    DHG, GipsHack, Netp0is0n, de1irium, r00tc0de, f0kp
    l0bster, r4ShRaY, D4rkGr3y, Moby, Orb, Foster, Owned, prior, dron
    (Ivanov Andrey)

  2. #2
    Jan Niehusmann
    Siemens *35 and 45 series phones SMS Danial of Service
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    Re: Siemens *35 and 45 series phones SMS Danial of Service

    --WIyZ46R2i8wDzkSu
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    On Mon, Mar 03, 2003 at 01:06:43AM -0000, subj subj wrote:
    > To vulnerability are subject: All versions siemens *35 and *45.

    [...]
    > languages from the phone language selection menu, will
    > completely disable *35 series phones and result
    > in a 2 minute read delay on *45 series phones. Note that


    Please note that this vulnerability isn't as serious as you describe it.
    At least on my S45, I am able to interrupt this 2 minute delay at any
    time by pressing the 'hang up' key (but I have to press it for about half a
    second instead of just hitting it), the message can be read by using
    'edit message' instead of 'read message', and it can be deleted without
    problems.

    So while this obviously is a bug, it can hardly be called a DoS.

    Jan


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  3. #3
    Andreas Hofmeister
    Siemens *35 and 45 series phones SMS Danial of Service
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    Thread Starter

    Re: Siemens *35 and 45 series phones SMS Danial of Service

    Jan Niehusmann wrote:

    >On Mon, Mar 03, 2003 at 01:06:43AM -0000, subj subj wrote:
    >
    >
    >> To vulnerability are subject: All versions siemens *35 and *45.
    >>

    <snip>

    > the message can be read by using
    >'edit message' instead of 'read message', and it can be deleted without
    >problems.
    >
    >So while this obviously is a bug, it can hardly be called a DoS.
    >


    An S35 locks up *completly* when one attemps to read the message -
    worse: you had to read the message (wich is not possible) before you
    could delete it, there is no edit option in the message list. Regarding
    the S35 it really is a DoS.

    Ciao
    Andreas




  4. #4
    Willis Johnson
    Siemens *35 and 45 series phones SMS Danial of Service
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    Thread Starter

    RE: Siemens *35 and 45 series phones SMS Danial of Service

    What happens if the string is sent repeatedly while the phone is turned
    on but is unattended or receives text messages silently? Is the battery
    drained as predicted?=20

    Willis

    -----Original Message-----
    From: Jan Niehusmann [mailto:jan@gondor.com]=20
    Sent: Monday, March 03, 2003 2:46 PM
    To: subj subj
    Subject: Re: Siemens *35 and 45 series phones SMS Danial of Service


    On Mon, Mar 03, 2003 at 01:06:43AM -0000, subj subj wrote:
    > To vulnerability are subject: All versions siemens *35 and *45.

    [...]
    > languages from the phone language selection menu, will completely=20
    > disable *35 series phones and result in a 2 minute read delay on *45=20
    > series phones. Note that


    Please note that this vulnerability isn't as serious as you describe it.
    At least on my S45, I am able to interrupt this 2 minute delay at any
    time by pressing the 'hang up' key (but I have to press it for about
    half a second instead of just hitting it), the message can be read by
    using 'edit message' instead of 'read message', and it can be deleted
    without problems.

    So while this obviously is a bug, it can hardly be called a DoS.

    Jan


  5. #5
    Robert Waldner
    Siemens *35 and 45 series phones SMS Danial of Service
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    Thread Starter

    Re: Siemens *35 and 45 series phones SMS Danial of Service

    ------------=_1046768028-557-47
    Content-type: text/plain; charset=iso-8859-1
    content-transfer-encoding: quoted-printable


    On Mon, 03 Mar 2003 23:46:09 +0100, Jan Niehusmann writes:
    >On Mon, Mar 03, 2003 at 01:06:43AM -0000, subj subj wrote:
    >> To vulnerability are subject: All versions siemens *35 and *45.

    >[...]
    >> languages from the phone language selection menu, will
    >> completely disable *35 series phones and result
    >> in a 2 minute read delay on *45 series phones. Note that


    >Please note that this vulnerability isn't as serious as you describe it.
    >At least on my S45, I am able to interrupt this 2 minute delay at any
    >time by pressing the 'hang up' key (but I have to press it for about half a
    >second instead of just hitting it), the message can be read by using
    >'edit message' instead of 'read message', and it can be deleted without
    >problems.
    >
    >So while this obviously is a bug, it can hardly be called a DoS.


    However, my S35i is _completely_ disabled, just as the original poster=20
    described, no luck with just pressing the "hang up"-key, one has to=20
    yank the battery out. Also, there is no "Edit Message" available until
    after one reads a message, and thus disables the phone.

    Please also note that if you append something to the "%String", the bug=20
    no longer hits (for my S35i, that is). Most web->sms - gateways append
    some signature to SMSs, and thus, by sheer luck, can't be used to exploit
    this.

    cheers,
    &rw
    --=20
    / Ing. Robert Waldner | Security Engineer | CoreTec IT-Security \
    \ <rw@coretec.at> | T +43 1 503 72 73 | F +43 1 503 72 73 x99 /



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