Hi Randy,
Yes - you got the threat right.
The second thread that I mentioned was, if the AAA network
service has been compromised, then a sound MFD could
be used by an attacker (with stolen credentials) to send
OTHER users document data out through PSTN Fax.
Cheers,
- Ira
Ira McDonald (Musician / Software Architect)
Chair - Linux Foundation Open Printing WG
Blue Roof Music/High North Inc
email: blueroofmusic at gmail.com
winter:
579 Park Place Saline, MI 48176
734-944-0094
summer:
PO Box 221 Grand Marais, MI 49839
906-494-2434
On Fri, Aug 14, 2009 at 12:55 PM, Randy Turner<rturner at amalfisystems.com> wrote:
>> So if an MFP (with PSTN fax capability) has been compromised, then someone
> could possibly re-vector confidential documents to be printed (or being
> scanned) and send these to some remote fax recipient over the PSTN fax
> feature. Did I paraphrase the threat accurately?
>> Thanks!!
> Randy
>>>> On Aug 14, 2009, at 7:56 AM, Ira McDonald wrote:
>>> Hi Randy,
>>>> Not that I know of.
>>>> In my previous experience with government agencies,
>> the primary concern about PSTN Fax was that it could be
>> used *from a compromised system or by a rogue walkup
>> user* to export documents and system configuration
>> information invisibly, i.e., w/out passing through a firewall
>> and w/out any chance of detection by smart routers
>> (ones with embedded firewalls).
>>>> Cheers,
>> - Ira
>>>> Ira McDonald (Musician / Software Architect)
>> Chair - Linux Foundation Open Printing WG
>> Blue Roof Music/High North Inc
>> email: blueroofmusic at gmail.com>> winter:
>> 579 Park Place Saline, MI 48176
>> 734-944-0094
>> summer:
>> PO Box 221 Grand Marais, MI 49839
>> 906-494-2434
>>>>>>>> On Thu, Aug 13, 2009 at 9:55 PM, Randy Turner<rturner at amalfisystems.com>
>> wrote:
>>>>>> Are there any documents on the internet that you guys know about that
>>> describe existing attack vectors on PSTN/Analog Fax lines?
>>>>>> Randy
>>>>>>>>> On Aug 13, 2009, at 6:44 PM, Ira McDonald wrote:
>>>>>>> Hi Randy,
>>>>>>>> It's not that we don't care about IFax.
>>>>>>>> It's that all forms of Internet Fax have protocols and IP
>>>> ports that would be reported in HCD_Firewall_Setting.
>>>>>>>> But many businesses and government agencies ALSO
>>>> want to close the "back door" of PSTN Fax.
>>>>>>>> Cheers,
>>>> - Ira
>>>>>>>> Ira McDonald (Musician / Software Architect)
>>>> Chair - Linux Foundation Open Printing WG
>>>> Blue Roof Music/High North Inc
>>>> email: blueroofmusic at gmail.com>>>> winter:
>>>> 579 Park Place Saline, MI 48176
>>>> 734-944-0094
>>>> summer:
>>>> PO Box 221 Grand Marais, MI 49839
>>>> 906-494-2434
>>>>>>>>>>>>>>>> On Thu, Aug 13, 2009 at 9:02 PM, Randy Turner<rturner at amalfisystems.com>
>>>> wrote:
>>>>>>>>>> Hi All,
>>>>>>>>>> When we came up with this attribute, we include PSTN in the name, which
>>>>> means we only care about PSTN fax, and not internet-fax options such as
>>>>> T.38
>>>>> or other fully capable iFax features.
>>>>> Did we mean to do this? We only care about PSTN? Which I assume to mean
>>>>> analog fax?
>>>>>>>>>> Randy
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