wireshark-users March 2010 archive
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wireshark-users: Re: [Wireshark-users] from the past

Re: [Wireshark-users] from the past

From: bart sikkes <b.sikkes_at_nospam>
Date: Wed Mar 24 2010 - 20:25:48 GMT
To: Community support list for Wireshark <wireshark-users@wireshark.org>

hi,

can you show us the capture? a screenshot with the actual username /
password removed or such?

i expect it just being a reauthentication action or something like
that. wireshark just captures what is transmitted so something is
transmitting this at the moment of capturing. a lot more happens below
the surface then one initially suspects (and many things will be send
plain text). the fact it ends up in the file is because that is how
wireshark usually works.

good luck finding it,
bart

On Wed, Mar 24, 2010 at 8:58 PM, Gianluca Varenni
<gianluca.varenni@cacetech.com> wrote:
>
>
> --------------------------------------------------
> From: "M K" <gedropi@gmail.com>
> Sent: Wednesday, March 24, 2010 12:45 PM
> To: "Community support list for Wireshark" <wireshark-users@wireshark.org>
> Subject: Re: [Wireshark-users] from the past
>
>> Sorry. I got called away.
>>
>> The etherXXXX tmp file doesn't appear to have timestamps. But within
>
> If it's a valid capture file, the packets must have a timestamp, if you open
> the file with wireshark.
>
> GV
>
>
>> WS, the LLC (Layer 2) & PPP LCP protocols are the first protocols to
>> show up in the trace at the time the login info is captured inside the
>> tmp file.
>>
>> I suspect that this info is being passed to the tmp file. Possible
>> suspects: the OS or networking appliances.
>>
>> Yes, the interface is: Adapter for generic dialup and VPN
>>
>> And thanks for this feedback and help.
>>
>> On 3/24/10, Gianluca Varenni <gianluca.varenni@cacetech.com> wrote:
>>> You didn't answer my questions:
>>>
>>> 1. what is the timestamp of those packets?
>>> 2. what interface are you capturing from?
>>>
>>> Are capturing from what is called "Adapter for generic dialup and VPN
>>> capture"?
>>>
>>> Have a nice day
>>> GV
>>>
>>>
>>>
>>> --------------------------------------------------
>>> From: "M K" <gedropi@gmail.com>
>>> Sent: Wednesday, March 24, 2010 9:25 AM
>>> To: "Community support list for Wireshark"
>>> <wireshark-users@wireshark.org>
>>> Subject: Re: [Wireshark-users] from the past
>>>
>>>> That is exactly what I am doing. I log onto my Windows machine, then
>>>> my ISP, then my proxy. Then maybe go to a few websites, for example.
>>>> Then maybe after a half hour, I may then start up a WS capture.
>>>> Still, even after all that time between logons and actually starting a
>>>> capture, the etherXXXXa tmp file still contains this private info.
>>>>
>>>> According to Jeff, the etherXXXXa file only captures what is not
>>>> encrypted. That makes this even more scary. That means that not only
>>>> is the info being captured but it isn't even being protected by even
>>>> low-grade encryption.
>>>>
>>>> On 3/24/10, Gianluca Varenni <gianluca.varenni@cacetech.com> wrote:
>>>>>
>>>>>
>>>>> --------------------------------------------------
>>>>> From: "M K" <gedropi@gmail.com>
>>>>> Sent: Wednesday, March 24, 2010 9:11 AM
>>>>> To: "Community support list for Wireshark"
>>>>> <wireshark-users@wireshark.org>
>>>>> Subject: Re: [Wireshark-users] from the past
>>>>>
>>>>>> That is the question. I am saying that some program (?) is capturing
>>>>>> my unsaved login info. Then at a later point, when I start a WS
>>>>>> capture, that login info from the past is put into that EtherxXXXXa
>>>>>> tmp file.
>>>>>
>>>>> What happens if you log into your ISP and proxy, wait let's say 5
>>>>> minutes
>>>>> and then start wireshark? Do those packets still show up? what is their
>>>>> tiemstamp?
>>>>>
>>>>> GV
>>>>>
>>>>>>
>>>>>> On 3/24/10, Gianluca Varenni <gianluca.varenni@cacetech.com> wrote:
>>>>>>> Are you saying that when you start Wireshark, wireshark itself starts
>>>>>>> capturing, *before* you click the start capture button on it?
>>>>>>> Which adapter is wireshark capturing from?
>>>>>>>
>>>>>>>
>>>>>>> Have a nice day
>>>>>>> GV
>>>>>>>
>>>>>>>
>>>>>>> --------------------------------------------------
>>>>>>> From: "M K" <gedropi@gmail.com>
>>>>>>> Sent: Wednesday, March 24, 2010 8:12 AM
>>>>>>> To: <wireshark-users@wireshark.org>
>>>>>>> Subject: [Wireshark-users] from the past
>>>>>>>
>>>>>>>> Jeff Morriss suggested that I pose this question to you folks.
>>>>>>>>
>>>>>>>> Here is what I wrote:
>>>>>>>> First:
>>>>>>>> I first log onto Windows machine
>>>>>>>> I log onto my Isp
>>>>>>>> I log into my proxy
>>>>>>>> Maybe do a few things online (eg. go to a few websites)
>>>>>>>> Then log into Wireshark
>>>>>>>>
>>>>>>>> Next:
>>>>>>>> When launching WS, immediately the capture starts a DNS
>>>>>>>> authentication
>>>>>>>> trace
>>>>>>>> and an etherXXXXa* file with Windows & ISP usernames AND passwords
>>>>>>>> is
>>>>>>>> created.
>>>>>>>> Since I expect WS to be literal, I would expect that those actions
>>>>>>>> that
>>>>>>>> had
>>>>>>>> taken place in the past (logons & DNS authentication) would not be
>>>>>>>> captured
>>>>>>>> since WS had not been started when I logged on. That means that
>>>>>>>> this
>>>>>>>> information is being cached or worse somewhere. For my peace of
>>>>>>>> mind,
>>>>>>>> please
>>>>>>>> can you tell me about this security issue? Thank you.
>>>>>>>> ......................
>>>>>>>>
>>>>>>>> Here is what Jeff wrote:
>>>>>>>> Anyway, a brief answer: Wireshark on Windows relies on WinPCAP to do
>>>>>>>> the
>>>>>>>> capturing. I'm pretty sure WinPCAP won't start capturing until you
>>>>>>>> ask
>>>>>>>> it
>>>>>>>>
>>>>>>>> to
>>>>>>>> do so. And I'm pretty sure that the OS's TCP/IP stack isn't going
>>>>>>>> to
>>>>>>>> cache
>>>>>>>> stuff to give to WinPCAP after the fact.
>>>>>>>>
>>>>>>>> (BTW, the etherXXX file is just the temporary PCAP file that
>>>>>>>> contains
>>>>>>>> the
>>>>>>>> packets that were captured--and what Wireshark displays for you.
>>>>>>>> The
>>>>>>>> fact
>>>>>>>>
>>>>>>>> that
>>>>>>>> your password, etc., are in there just indicate that your password,
>>>>>>>> etc.,
>>>>>>>> were
>>>>>>>> sent over the wire unencrypted.)
>>>>>>>> ..............
>>>>>>>> What Jeff described is what I expected but I believe that I
>>>>>>>> understand
>>>>>>>> now what I am seeing. WS does its own DNS. So, that explains the
>>>>>>>> first question.
>>>>>>>>
>>>>>>>> The second issue, however, is still a big concern. The etherXXXXa
>>>>>>>> file always contains the complete (passwords included)
>>>>>>>> authentication
>>>>>>>> data plus more. Again, this unsaved (by me) login information was
>>>>>>>> sent over the wire in the past (PPP PAP), yet it is being saved (by
>>>>>>>> ?)
>>>>>>>> and put into this file in the present. How can I prevent this login
>>>>>>>> info from being saved? How can I encrypt this login info? This is a
>>>>>>>> security risk.
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> All that is necessary for evil to succeed is that good men do
>>>>>>>> nothing.
>>>>>>>>
>>>>>>>> ~Edmund Burke
>>>>>>>> ___________________________________________________________________________
>>>>>>>> Sent via: Wireshark-users mailing list
>>>>>>>> <wireshark-users@wireshark.org>
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>>>>>>>>
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>>>>>>>
>>>>>>> ___________________________________________________________________________
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>>>>>>> <wireshark-users@wireshark.org>
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>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> All that is necessary for evil to succeed is that good men do nothing.
>>>>>>
>>>>>> ~Edmund Burke
>>>>>> ___________________________________________________________________________
>>>>>> Sent via: Wireshark-users mailing list
>>>>>> <wireshark-users@wireshark.org>
>>>>>> Archives: http://www.wireshark.org/lists/wireshark-users
>>>>>> Unsubscribe: https://wireshark.org/mailman/options/wireshark-users
>>>>>>
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>>>>>
>>>>> ___________________________________________________________________________
>>>>> Sent via: Wireshark-users mailing list
>>>>> <wireshark-users@wireshark.org>
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>>>>>
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>>>>>
>>>>
>>>>
>>>> --
>>>> All that is necessary for evil to succeed is that good men do nothing.
>>>>
>>>> ~Edmund Burke
>>>> ___________________________________________________________________________
>>>> Sent via: Wireshark-users mailing list
>>>> <wireshark-users@wireshark.org>
>>>> Archives: http://www.wireshark.org/lists/wireshark-users
>>>> Unsubscribe: https://wireshark.org/mailman/options/wireshark-users
>>>>
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>>>
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>>>
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>>>
>>
>>
>> --
>> All that is necessary for evil to succeed is that good men do nothing.
>>
>> ~Edmund Burke
>> ___________________________________________________________________________
>> Sent via: Wireshark-users mailing list <wireshark-users@wireshark.org>
>> Archives: http://www.wireshark.org/lists/wireshark-users
>> Unsubscribe: https://wireshark.org/mailman/options/wireshark-users
>>
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>
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